JP2006323741A - Asset management support system, asset management support method, program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an asset management support system that supports planning for implementing repair/improvement measures and renewal measures involved in the maintenance of a plurality of structures such as bridges at timings optimum for each structure as meeting short, medium and long term budgets. <P>SOLUTION: The bridge asset management support system 1 comprises a computer system 3 and a database 5. A basic strategy planning support means 13 first supports budgeting and the like, and an individual bridge LCC calculation means 15 preliminarily selects one or more maintenance scenarios applicable to each individual bridge and calculates LCCs of the maintenance scenarios. A medium and long term budget planning means 17 decides medium and long term budget plans and a scenario for each bridge meeting total medium and long term budgets and leveling according to the preliminarily selected LCC calculation results, and a medium term business planning means 19 creates short and medium term maintenance renewal measures from the medium and long term budget plans as meeting short and medium term budgets. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an asset management support system for structures such as bridges, and, for a plurality of structures, repair / renovation work or renewal work accompanying maintenance management is performed at an optimal time for each structure, and in the medium and long term. The present invention relates to an asset management support system that supports creation of a plan for execution to meet a budget.

A concept called life cycle cost (LCC) has been introduced to maintain and manage structures such as bridges. LCC is the total cost for the maintenance of the structure during the period from the completion of the structure until the completion of service (service period).
LCC can be obtained by the development of simulation technology and the development of a database system for storing and managing data such as structure design data and inspection data. There is also a method for supporting the maintenance of buildings using LCC. Some have been proposed (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 2001-200355 JP 2004-259141 A

However, these maintenance support methods seek life cycle costs (LCC) for a single structure and attempt to optimally determine the repair, refurbishment, and renewal times associated with the maintenance of the structure. The overall budget is not considered.
Usually, the road manager maintains a plurality of structures such as bridges, and the maintenance must be performed so as to satisfy the short-term, medium-term, and long-term budgets.
Therefore, even when planning the timing and method of repair, refurbishment, and renewal for the best maintenance and management of individual structures as in the above two proposals, the budget for the multiple structures There is a problem that it cannot be satisfied and cannot be implemented as planned.

  The present invention has been made in view of such problems, and its purpose is to repair, repair, and renewal work accompanying maintenance for a plurality of structures such as bridges at the optimal time for each structure. In addition, it is to provide an asset management support system that supports creation of a plan for execution so as to satisfy the medium-term and long-term budgets.

  An asset management support system consisting of a database system and computer that maintains and updates multiple structures such as bridges, and calculates the maintenance update life cycle cost for each structure. Based on the maintenance management update life cycle cost data for each structure calculated by the cycle cost calculation means and the maintenance update life cycle cost calculation means, the maintenance update life cycle cost for all structures is calculated. Based on the medium- to long-term budget plan created by the medium- to long-term budget plan created by the medium-to-long-term budget plan created to satisfy the budget constraints, the repair and repair measures implemented in each fiscal year are updated. A medium-term business plan creation means for determining the contents of the countermeasure business, It is a support system.

  The maintenance management renewal life cycle cost calculating means calculates the maintenance renewal life cycle cost for each of the plurality of maintenance renewal scenarios selected according to the special circumstances, soundness, and importance of the structure. Here, in the maintenance management renewal scenario, an acceptable level of soundness is set as a maintenance management target, and appropriate measures are taken at predetermined times so that the soundness of members constituting the structure does not fall below the acceptable level. This is a scenario that defines that. The maintenance and renewal life cycle cost calculation method is based on the selected scenario, the future prediction data of soundness stored for each component, material, and degradation mechanism of the structure in the database system, and the measures set for each scenario. The maintenance and renewal life cycle cost for each year of the structure is calculated from data on the timing, countermeasure method and countermeasure cost.

  As described above, the maintenance management update life cycle cost for a plurality of maintenance management update scenarios is calculated for each structure by the maintenance management update life cycle cost calculation means. The plurality of maintenance management scenarios are selected so that a combination of scenarios that satisfy the medium- to long-term budget constraints described later can be selected later from the selected maintenance management scenarios.

The medium- to long-term budget plan creation means determines a combination of scenarios satisfying the medium- to long-term maintenance budget constraint or the update budget constraint from a plurality of scenarios selected for each structure.
Here, if the medium- to long-term maintenance budget has a leveling constraint that keeps the budget for each fiscal year constant, the maintenance management life cycle of all structures calculated by the maintenance management life cycle cost calculation means The cost is aggregated and the value divided by the number of years in the life cycle period that is the target of the medium- to long-term budget plan is defined as the annual budget. If the cost exceeds the annual budget for each fiscal year, the excess is carried forward to the next year. If the cost is lower than the annual budget, the next year is carried forward in order, and the leveling of the budget is determined depending on whether the amount carried over is within the delay limit of the countermeasure work required empirically.
At this time, the annual budget may be set to a stepwise value so that the total annual budget for the life cycle period is equal to the total amount of the maintenance management update life cycle cost for the life cycle period.
The medium- to long-term budget plan creation means selects scenarios according to the priorities set in advance for each structure as a combination of scenarios, calculates maintenance and renewal life cycle costs for all structures, and performs leveling decisions. If it is determined that the leveling is not achieved, the structure scenario is changed to satisfy the leveling determination.
When changing the scenario of a structure, the cost reduction effect before the fiscal year when the judgment of leveling is rejected is large, and the increase in the accumulated life cycle cost of structure maintenance management due to the scenario change is reduced It is desirable to change the scenario.

  The medium-term business plan creation means is determined by the medium-to-long-term budget creation means, and the first and second from the scenario and maintenance update lifecycle cost data determined for each structure stored in the database system The repair / repair measures and renewal measures to be implemented during the mid-term period are extracted by component type and construction type, and the order of measures is determined in descending order of necessity for the first mid-term and second mid-term periods. The implementation period is changed so that multiple measures that reduce costs when implemented simultaneously in the same structure are implemented, and the implementation year is determined according to the budget of each year.

  As described above, according to the first invention, the best maintenance satisfying the medium- to long-term budget constraints based on the calculation results of the maintenance management update life cycle costs for a plurality of maintenance management update scenarios selected for each structure. Obtain a combination of management renewal scenarios, and then extract repair / repair measures or renewal measures to be implemented within the first and second medium-term periods for each component type, and implement countermeasures in descending order of necessity. In addition, it is possible to determine the order of implementation, and to meet the budget for each fiscal year after changing the implementation period so that multiple measures can be implemented simultaneously that will reduce costs if implemented simultaneously with the same structure. It becomes possible.

  The second invention is an asset management support system comprising a database system and a computer for maintaining and updating a plurality of structures such as bridges, etc., and maintaining and updating life cycle costs for each structure. Medium- to long-term that integrates all structures based on the maintenance management life cycle cost calculation process and maintenance management update life cycle cost data for each structure calculated by the maintenance management life cycle cost calculation method Based on the medium- to long-term budget plan created by the medium- to long-term budget plan creation process and the medium- to long-term budget plan creation method, which calculates the maintenance management renewal life cycle cost and creates the medium- to long-term budget plan that satisfies the budget constraint A mid-term business plan creation process that determines the contents of repair / repair measures and renewal measures to be implemented in the fiscal year It is an asset management support method according to claim Rukoto.

  In this way, the second invention is based on the maintenance management update life cycle cost of each structure calculated by the maintenance management update life cycle cost calculation process. Then, create a medium- to long-term budget plan to meet the medium- to long-term budget constraints, and then, based on the medium- to long-term budget plan, the mid-term business plan creation process This is an asset management support method that decides to meet the annual budget.

  A third invention is a program for causing a computer to function as the asset management support system according to any one of claims 1 to 12.

  A program according to a third aspect is a program that causes a computer to function as the asset management support system according to any one of claims 1 to 12, and the program can be distributed via a network.

  A fourth invention is a recording medium on which a program for causing a computer to function as the asset management support system according to any one of claims 1 to 12 is recorded.

  The recording medium of the fourth invention records a program for causing a computer to function as the asset management support system according to any one of claims 1 to 12, and the storage medium can be distributed. This program can also be distributed via a network.

  With the asset management support system of the present invention, repair / renovation work and renewal work accompanying maintenance for multiple structures such as bridges, etc., satisfy the medium-term and long-term budget constraints at the optimal time for each structure. It becomes possible to support the creation of a plan for execution.

(1. Configuration)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a bridge asset management support system 1 according to the present embodiment. In the present embodiment, a bridge asset management support system for bridges will be described. However, the present invention is not limited to bridges, and structures that require asset management such as roads, tunnels, and lifelines. Any object can be used.

  As shown in FIG. 1, the bridge asset management support system 1 includes a computer system 3, a database 5, a personal digital assistant (PDA: Personal Digital Assistance or Tablet PC) 7, and the like. As shown in FIG. 3, the computer system 3 includes a control unit 31 such as a central processing unit, an input unit 33 such as a keyboard, a mouse, and a scanner, a printing unit 35 such as a printer, and a display unit such as a CRT and a liquid crystal display device. 37, a storage unit 39 such as an HDD (Hard Disc Drive), a communication unit 41 such as a modem or a LAN board connected to a network, and a media input / output unit that reads and writes a storage medium (flexible disk, CD-ROM, etc.) 43, each connected to a system bus 45.

  The database 5 is constructed outside the computer system 3. For example, the database 5 is connected to the computer system 3 via the communication unit 41 or the system bus 45, and exchanges data with the computer system 3. Is possible. The database 5 may also be constructed in the storage unit 39 of the computer system 3. The portable information terminal 7 is connected to the computer system 3 via the communication unit 41 of the computer system 3.

The control unit 31 of the computer system 3 reads and executes a program stored in the storage unit 39. In the bridge asset management support system 1 of the present embodiment, the inspection support means 11, the basic strategy development support means 13, the LCC calculation means 15 for individual bridges, the medium- to long-term budget plan creation means 17, and the medium-term business plan creation means 19 are provided. Realized programs are respectively stored in the storage unit 39, and by executing these programs by the control unit 31, bridge asset management is implemented.
Each means will be described in detail later. To explain the outline, the inspection support means 11 is a means for supporting periodic inspection of each bridge, and the basic strategy development support means 13 is for short-, medium- and long-term budgets and targets. The means to support the setting and formulation of basic strategies, the LCC calculation means 15 for individual bridges, a means to select multiple maintenance management update scenarios for each bridge, and to calculate the LCC for each scenario, The long-term budget plan creation means 17 selects a combination of maintenance management update scenarios for each bridge that satisfies the medium- to long-term budget constraints formulated by the basic strategy development support means 13, and calculates a LCC for all bridges. The medium-term business plan creation means 19 is based on the medium- to long-term budget plan created by the medium-to-long-term budget plan creation means 17 and the basic strategy formulation support means for the maintenance and renewal measures implemented in each medium-term year Was developed by 3 is a means for determining to satisfy the annual budgets.

Data used in each program, data obtained as a result of executing each program, and the like are stored in the database 5.
For example, basic data of each bridge, for example, information such as construction information and environmental conditions is stored in the database 5 as a bridge basic database 51. The construction information is, for example, information such as the name of the structure, construction / service start time, scheduled service period, structure type, material of the member, shape and dimensions, and the environmental conditions are the annual average temperature and annual average humidity. Is input by the operator in an interactive format, or read from a file or the like and stored in the database 5.

  In addition, the database 5 includes an inspection database 23, basic strategy data 25, soundness weighting data 27, all bridge soundness data 29, all bridge importance data 47, all bridge scenario primary selection results 49, and a deterioration prediction formula database 51. , Soundness future prediction result 53, Scenario-specific countermeasure construction method database 55, Bridge / scenario-specific LCC calculation result 57, Medium- to long-term LCC calculation result 59, LCC leveling data 61, Medium- to long-term plan creation data 63, First medium-term, second Medium-term countermeasure bridge data 65, medium-term business plan creation data 67, and the like are stored, which will be described later.

(2. Inspection support means)
The inspection support means 11 is means for supporting inspection of each bridge and storing the inspection result in the inspection database 23 of the database 5.
The inspection is performed using the portable information terminal 7. The inspector carries the portable information terminal 7 at the time of patrol, daily inspection several times a year, or periodic inspection once every several years, and inspects each part of the bridge by visual inspection etc. and carries the inspection results. Input to the information terminal 7.

FIG. 3 is a display example of the portable information terminal 7.
As shown in FIG. 3A, when an inspection result is input to the portable information terminal 7, an inspection site is first selected. That is, in the figure, the inspection member is a road-P1-main girder. This part is visually inspected, and the type and degree of damage are input, or the soundness as shown in FIG. 3B is input.
The degree of soundness is expressed by a numerical value in the range of 5.5 to 0.5, indicating whether each part of the bridge maintains soundness or how much it deteriorates.
In other words, taking the soundness level of reinforced concrete due to salt damage as an example, the soundness level 5.5 to 4.5 shows no change in appearance and the latent period until the corrosion of the rebar occurs. 5 to 3.5, no change in appearance was observed, and the progress of corrosion of the reinforcing bar, soundness 3.5 to 2.5, cracking due to corrosion of the reinforcing bar occurred, In the first half of the acceleration period, the soundness of 2.5 to 1.5 is high, and in the second half of the acceleration period, where cracks due to corrosion of the reinforcing bars occur and partial peeling and peeling are seen, the soundness of 1.5 to 0.5 is It shows a deterioration period in which the width of cracks is large and large peeling and peeling are observed.
There are multiple indicators of soundness in combination of the types of members constituting the bridge, such as floor slabs, telescopic devices, superstructures, supports, substructures, etc., and types of deterioration mechanisms, such as salt damage, frost damage, etc. It is prepared.

  The data collected in the portable information terminal 7 is sent to the computer system 3 via the communication unit 41 of the computer system 3, and is displayed and printed by the inspection support means 11, stored in the inspection database of the database 5, and other Processing is executed. The inspection program executed on the portable information terminal 7 and the display contents of the portable information terminal 7 are held by the inspection support means 11 in the computer system 3 and sent to the portable information terminal 7 via the communication unit 41. .

Inspection data sent from the portable information terminal 7 via the communication unit 41 is processed by the inspection support means 11. That is, as shown in FIG. 4, the contents of inspection data are displayed on the display device connected to the computer system 3 via the display unit 37, or the inspection data is stored in the inspection database 23 of the database 5. I do.
The inspection data is stored in the inspection database 23 for each element in which each bridge is divided for each member, each bridge is divided into spans each having a certain length, and each span is divided into a plurality of parts.
That is, as shown in FIG. 4, the A bridge is divided into members such as floor slabs, supports, superstructures, substructures, etc., and further, span between P1P2, span between P2P3, span between P3P4, etc. Divided into spans of a certain length. Further, each span of each member is divided into meshes as shown in FIG. 5, and each mesh portion is an element, and inspection data exists for each element and is stored in the inspection database 23.

Fig.5 (a) has shown the example of an element in 1 span about the main girder of a superstructure, and a vertical girder.
That is, one span is divided into 5 in the direction of the bridge axis and 4 in the direction perpendicular to the bridge axis, and the main girder and vertical girder of one span are managed as a set of 20 elements. In particular, the end portion of the spar that is rapidly deteriorated due to water leakage from the telescopic device or the like is separately managed as an element different from the other spar portions (0101E to 0401E).
Similarly, the floor slab is divided into elements as shown in FIG. 5B and managed.
As in these examples, other members of the bridge are similarly set with elements suitable for the members, and management for each element is performed.

(3. Bridge asset management support system)
FIG. 6 is a flowchart showing the flow of processing of the bridge asset management support system of this embodiment. These processes are executed based on data such as the inspection database 5 stored in the database 5 shown in FIG.
First, a basic strategy is formulated (s100). Although details will be described later, in this process, a medium- to long-term budget for the plurality of bridges, a budget for each fiscal year, a soundness target, etc. are determined, and these data are stored in the database 5 as basic strategy data 25 ( Formulation of soundness target and budget target S110).

Next, LCC calculation of individual bridges is performed (s200). Although details will be described later, first, a plurality of scenarios applicable to each bridge are selected from a plurality of scenarios for maintaining and managing a bridge prepared in advance (primary scenario selection s210). In s210, the inspection database 23 and the health weighting data 27 stored in the database 5 are used, and the resulting bridge health data and importance data are the total bridge health data 29 and the total bridge importance, respectively. The data 47 is stored in the database 5.
Next, the deterioration prediction formula stored in the database 5 is referred to the deterioration prediction formula representing the relationship between the soundness level and the time for each member and each deterioration mechanism stored in the database 51, and selected for each bridge member. Based on the scenario and deterioration prediction, the future prediction of repair / renovation or renewal countermeasure timing and soundness is performed (primary scenario selection s220). Then, the soundness future prediction result 53 obtained as a result is stored in the database 5.
Subsequent to s220, the LCC is calculated for each bridge scenario (calculation of scenario-specific LCC s230). At this time, the scenario-specific countermeasure database 55 that is data relating to the cost of repair / repair or update measures is used. The calculated bridge / scenario-specific LCC calculation result 57 is stored in the database 5.

Next, based on the bridge / scenario-specific LCC calculation result 57 calculated in s200 and the basic strategy data 25, a medium- to long-term budget plan creation (s300) for all bridges is executed.
Although details will be described later, first, one scenario is selected according to the priority set for each bridge (s310), and LCCs for all bridges are calculated (s320). Then, compared with the medium- to long-term budget constraint in the basic strategy data 25 (s330), when the medium-to-long-term budget is satisfied (yes in s330), the medium- to long-term budget is determined together with the combination of the scenarios (medium-to-long-term budget Decision s340). On the other hand, when the medium- to long-term budget constraint is not satisfied (no in s330), the process returns to s310, the scenario of each bridge is replaced, and the processes in s320 and s330 are executed. The processing from s310 to s330 is repeated until the LCCs of all the bridges satisfy the medium- and long-term budget constraints.
The determined scenario s310, the LCC leveling data 61 used for the LCC calculation s320 of all the bridges, and the determined medium to long-term plan creation data 63 are stored in the database 5.

A medium-term business plan is created based on the scenario of each bridge and the medium- to long-term budget plan obtained above (s400). In the medium-term business plan, repair / renovation or renewal measures to be implemented in each year of the first and second medium-term are determined.
Details will be described later, but first, the repair / repair measures to be implemented in the first and second mid-terms are listed according to the scenario of each bridge determined in the medium- to long-term budget plan creation s300, and the data are stored in the database 5 in the first and second 2 Stored as mid-term countermeasure bridge data 63 (extract countermeasure bridge s410).
Next, when there are multiple repair / repair measures for different parts on the same bridge, adjustments such as changing the implementation time to simultaneously implement multiple measures that reduce costs when two or more measures are implemented simultaneously And the execution order is determined (priority determination s420). Then, repair / repair work is arranged according to the determined order, and the implementation year of each work is determined according to the annual budget.

With the above processing, a scenario determined for each bridge and measures that satisfy the medium- to long-term budget can be determined for each year of the first and second medium-term.
Hereinafter, basic strategy formulation s100, individual bridge LCC calculation s200, medium- and long-term budget plan creation s300, and medium-term business plan creation s400 will be described in detail.
FIG. 7 is a display example of the main menu of the entire system on the display screen when the bridge asset management support system of this embodiment is started.
The overall main menu 71 is provided with four selection buttons in accordance with the processing flow (basic strategy formulation 101, individual bridge LCC calculation 201, medium- to long-term budget plan creation 301, medium-term business plan creation 401), Clicking one of them starts the corresponding process. Also, a selection button (system end 73) for ending the system is prepared, and this selection button may be clicked when the bridge asset management support system is ended.

(3-1. Basic strategy formulation)
When the basic strategy formulation 101 is selected in the overall main menu 71, for example, a basic strategy formulation support screen 75 as shown in FIG. 8 is displayed.
In formulating the basic strategy, the system user inputs numerical values of the soundness target and the budget target according to the instructions on the screen.
In order to quantify the goal of soundness (1) to eliminate old bridges, (2) to eliminate poorly sound bridges, and (3) to improve the soundness of all bridges ( In 1), enter the number of years to eliminate the old bridge, in (2) enter the soundness threshold and the number of years, and in (3) enter the target average soundness value in □.
The budget target is inputted separately for the renovation / update budget (4), which is a budget for the reconstruction of old bridges or bridges with low soundness, and the maintenance budget (5). When the “details” button (77, 78) on the right side is clicked, a table 79 for inputting the renovation update budget and the maintenance budget for each year is displayed. For example, 2 billion yen is entered in the maintenance budget for fiscal 2005, and 1 billion yen is entered in the maintenance budget for each subsequent fiscal year. In addition, the renovation and renewal budget is input in increments of 2.5 billion yen in 2010 and 2011, and 2.5 billion yen in 2015 and 2016.
When the “store in database” selection button 81 is clicked, the data (1) to (5) are stored in the database 5 as the basic strategy data 25.
When the formulation of these basic strategies is completed, the selection button 83 of “return to the whole main menu” is clicked. As a result, the entire main menu of FIG. 7 is displayed.

(3-2. LCC calculation of individual bridges)
Next, when the selection button 201 for “LCC calculation of individual bridge” on the display screen of the overall main menu 71 is clicked, a main menu 85 of LCC calculation of the individual bridge in FIG. 9 is displayed.
The main menu 85 includes selection buttons (91, 93, 95) for selecting the scenario primary selection, soundness future prediction, scenario-specific LCC calculation, which are LCC calculation procedures for individual bridges, It comprises a bridge selection menu 87 and the like for selecting a bridge for calculating.
For example, as shown in FIG. 9, a desired bridge can be selected by clicking on the fifth bridge name A row. Information about the selected bridge is displayed at the top of the screen (contents of selected bridge 89). If there are many target bridges, the next page of the bridge selection menu 87 may be displayed by clicking the “next page” selection button 97.
When a bridge to be processed is selected from the bridge selection menu 87 and the process selection buttons (91, 93, 95) on the right side are clicked, the respective processes are started. However, if the upper processing is not completed for each bridge, the lower processing cannot be executed. For example, “prediction of future soundness” for bridge A cannot be executed unless “primary selection of scenario” is completed for bridge A. In consideration of such a case, if the previous process is not completed, an error display to that effect may be output on the screen.

(3-2-1. Primary selection of scenario)
Next, the scenario primary selection process will be described. In FIG. 9, this process is activated by selecting a bridge from the bridge selection menu 87 and clicking a selection menu 91 of “primary scenario selection”.
First, the scenario will be described. FIG. 10 is a list showing types of maintenance management scenarios that can be selected. Here, eight types of scenarios are set. Six of these scenarios, namely preventive maintenance types -1 and -2 (scenarios A1 and A2), post maintenance types -1, -2, -3, and -4 (scenarios B1, B2, C1, and C2), This is a scenario where the current bridge is maintained while repairing and repairing it. On the other hand, the remodeling and updating type (scenario RW) and the partial updating types -1 and -2 (scenarios RS and RD) are scenarios in which all or part of the bridge is remodeled. For the scenarios (A1, A2, B1, B2, C1, C2) for extending the service life, maintenance management is performed based on the maintenance budget (5) formulated in the basic strategy formulation (s100) shown in FIG. . On the other hand, the renewal scenario (RW, RS, RD) is renewed based on the renewal update budget (4) shown in FIG.

As shown in FIGS. 10 and 11, the scenario is set with the soundness level as an index.
That is, in the scenarios A1 and A2, when the soundness level is lowered to 4, repair / repair measures are implemented and the soundness level is restored to 5 or more.
In the case of scenarios B1 and B2, when the soundness level drops to 3, the soundness level is restored to 4 to 5 by repair / repair measures. In the case of scenarios C1 and C2, the soundness level is reduced to 2 and repaired.・ Repair measures will be taken to restore the soundness level to 3-5.
As shown above, scenarios A1 and A2 are for early repair / repair measures, while scenarios B1 and B2, and C1 and C2 are repair / recovery that restores soundness after a certain degree of deterioration. It is intended to implement remedial measures.
Scenario numbers 1 and 2 have the same level of soundness, but there are options when there are two or more countermeasure methods. 1 is a high-grade grade with a high recovery level or the same recovery level. However, this is a scenario that adopts a method with a slow deterioration rate after countermeasures, and 2 is a scenario that adopts a standard method for standard grades.
Usually, it may be considered that A <B <C as the cost for repair / repair measures.
On the other hand, the remodeling / updating scenario RW is to perform the entire renewal, that is, the bridge replacement work, when the soundness level decreases to 1.

In the scenario primary selection process, one or more suitable scenarios are selected for each bridge.
FIG. 12 is a flowchart showing a flow of scenario primary selection processing, and FIG. 13 is a display example 501 of scenario primary selection. When the selection button 91 of “primary selection of scenario” is clicked in the main menu 85 of the LCC calculation of the individual bridge in FIG. 9, FIG. 13 is displayed.
The primary scenario selection s210 includes scenario selection in consideration of the environment around the bridge and the special circumstances of the bridge (scenario selection 505 based on special conditions such as the environment), scenario selection 507 based on the soundness of the bridge, and scenario selection 509 based on the importance evaluation of the bridge. The three selection methods are combined and performed. The three selection methods may be performed in any order.

As shown in FIG. 13, the bridge information 503 for the primary selection of the scenario at the top of the display shows the bridge from which primary selection will be performed.
In system selection 505 (s211) based on special conditions such as the environment, the maintenance manager, who is the user of this system, is technically in need of replacement and large-scale repair / renovation work, depending on the bridge installation location and environmental conditions. If it is difficult, or if a huge expense is required for replacement, it is determined for each bridge and the scenarios that are candidates for selection are limited. That is, in the former case, the preventive maintenance type scenario A1 or A2 is a candidate, and in the latter case, the update type scenario (RW, RS, RD) is excluded and the preventive maintenance scenario A1, A2, or the post-maintenance scenario is excluded. Let B1, B2, C1, and C2 be candidates.
FIG. 14 is an example of display display during the primary selection (s211) process of the scenario. As shown in the figure, the user of this system, for example, “a huge replacement cost due to special conditions such as the environment → excluding renewal scenarios (RW, RS, RD) → A1, A2, B1, B2, C1, By clicking the button to the left of “C2”, the update-type scenario can be excluded.

Next, scenario selection 507 based on bridge soundness will be described.
First, when the “Calculate Bridge Health” selection button 513 is clicked, the bridge health for the selected bridge is calculated (s212).
FIG. 15 is a flowchart illustrating the flow of the bridge health level calculation process.
First, inspection data on the selected bridge is read from the inspection database 23 in the database 5 (s217). Thereby, the soundness of each element of each member of the selected bridge is read.
Next, an average soundness level is obtained for each member constituting the bridge, that is, for example, an upper work, a lower work, and a floor slab (s218). Here, the average soundness level D of the slab, the average soundness level S of the superstructure, and the average soundness AP of the substructure are obtained.
Finally, in order to consolidate the overall soundness of one bridge, the soundness of each member previously determined (average slab D for the slab, average health S for the superstructure, and average health AP for the substructure) Is multiplied by a weighting factor and averaged to calculate the overall soundness of the bridge (s219).
The weighting coefficient is set in advance based on the importance of each member such as a floor slab of 30%, an upper work of 50%, and a lower work of 20%, and is stored in the database 5 as soundness weighting data 27. .

FIG. 16 shows another example of the weighting coefficient.
A weighting coefficient can be determined by combining the weights for the respective parts of the members.
The weighting method 1 is based on the weight of each part of each member devised by New York City, and the weighting method 2 is based on the weight devised by Professor Oshima of Kitami Institute of Technology.
In the case of the weighting method 1, the upper work 46%, the lower work 38%, the floor slab 16%, and in the case of the weighting technique 2, the upper work 54%, the lower work 22%, and the floor slab 24%. In consideration of such cases, a weighting factor that is considered optimal may be stored in advance as the soundness weighting data 27.

By clicking the “Calculate Bridge Soundness” selection button through the above processing, the soundness of the selected bridge is calculated and displayed as shown in FIG. 14 (527 in FIG. 14). Here, it is 3.84.
For example, when the soundness level is 1 or less, the soundness level is remarkably low. Therefore, it is desirable to select an update-type scenario such as replacement. In such a case, the button at the left end of 507 is clicked. As a result, the update-type scenario is set as a primary selection candidate (s213). If the soundness level is extremely low, the update scenario (
RW, RD, RS) may be selected.
In this embodiment, the scenario selection based on the soundness level is intended only when the soundness level is extremely low. However, a different scenario may be selected depending on the level of the soundness level.

Next, scenario determination (509) based on importance evaluation will be described. This is a scenario decision that takes into account the impact of traffic restrictions associated with repair / repair work and renewal work. In other words, it is desirable to refrain from large-scale construction as much as possible and to carry out small-scale construction on bridges designated as emergency transport routes or bridges with heavy traffic because they are greatly affected by traffic closure and traffic restrictions. That is, a preventive maintenance scenario is desirable. Scenario candidates are selected in consideration of the importance of each bridge.
First, when the “importance calculation” selection button 517 is clicked, importance calculation processing s214 is executed.

FIG. 17 is a score table used for importance calculation.
The evaluation items include, for example, automobile traffic volume, large vehicle traffic volume, presence / absence of a detour, bus route, erection position (large river, small river, overpass, overpass), wide area emergency traffic route designation, and the like. For each bridge, the score obtained by adding the scores of the above evaluation items becomes the importance score.
Bridge A is over 10,000 vehicles (6 points), over 5,000 large vehicles (15 points), over 10 minutes detour (10 points), bus route (10 points), installation In the case of a position small river (10 points) and wide area emergency traffic route designation 1 (20 points), the importance evaluation score is 71 points in total.
This result is displayed in the importance display portion 529 for scenario selection by importance evaluation. Based on this result, scenario candidates are narrowed down. That is, if the importance evaluation score is 75 points or more, scenario A1 or A2, 50 points to 74 points, scenario A1, A2, or B2, 30 points to 49 points, scenario A2, B1, or B2 If the number is 29 points or less, the scenario is A2, B1 to B3.
The user of the system clicks one of the four options depending on the importance displayed in the display portion 529. Thereby, a primary scenario candidate based on the importance score is determined (s215). In the case of the A bridge with 71 importance score, scenarios A1, A2, and B1 are candidates.

  At this time, when the selection button 519 of the “all bridge importance degree data list” is clicked, importance degree data for all bridges (the bridges calculated so far) as shown in FIG. 18 is displayed. The importance data of all bridges shown in FIG. 18 is stored in the database 5 as all bridge importance data 47. In addition, regarding the soundness level, by clicking the selection button 515 of “all bridge soundness data list”, a list of soundness levels for all bridges (bridges calculated so far) can be displayed in the same manner. The soundness data 29 of all the bridges is stored in the database 5.

Finally, final decision s216 for scenario primary selection is performed that combines three selection methods: primary scenario selection 505 based on special conditions such as the environment, scenario selection 507 based on bridge health, and scenario selection 509 based on importance evaluation. This is executed by clicking a selection button 521 of “final decision of scenario primary selection”.
In the final decision processing, for example, the scenario selection result (505) based on special conditions such as the environment, the scenario selection result based on the bridge soundness level (507), and the scenario selection result based on the importance evaluation (509) are combined to perform primary selection. .
That is, when a scenario is limited by scenario selection 505 based on special conditions such as the environment (selecting preventive maintenance scenario or excluding update-type scenario), in addition to this, by limiting by scenario selection 509 based on importance evaluation, This is the final primary scenario selection result.
In addition, if the scenario is not limited by the scenario selection 505 based on special conditions such as the environment, and the update type scenario is selected in the scenario selection 507 based on the bridge soundness level, the update type scenario (RW, RS, RD) is selected as the selection result. To do.
When scenarios are not limited by scenario selection 505 based on special conditions such as environment and scenario selection 507 based on bridge soundness, the result of scenario selection 509 based on importance evaluation is set as the final selection result.

The final scenario primary selection result is displayed as a scenario primary selection result 531.
In addition, when the selection button 523 of “all bridge scenario primary selection result list” is clicked, the final scenario primary selection result for all bridges (the bridges determined so far) is displayed as shown in FIG. Is done. In FIG. 19, the finally selected scenario is shaded. That is, in the case of the bridge AAA, the scenarios A1 and A2 are selected, and in the case of the bridge AA, the scenarios A1, A2, and B1 are selected.
Further, as shown in FIG. 19, data regarding three selection methods that are the basis for primary scenario selection may be displayed simultaneously.
As a result, in the case of the bridge BB, it is indicated that the scenarios A1 and A2 are selected as the preventive maintenance designation due to special conditions such as the environment. In the case of the bridge CC, it can be seen that A2, B1, and B2 are selected by the importance evaluation after excluding the update scenario. In the case of the bridge CB, the soundness level is remarkably low at 1.21, and since the scenario is not limited by the selection based on special conditions such as the environment, the maintenance scenario RW for the entire update (replacement) is selected. .

Through the above processing, the primary selection result of the determined scenario is stored in the database 5 as the primary scenario selection result 49 of all bridges (determined bridges).
When the scenario primary selection of one bridge is completed, a selection button 525 of “To main LCC calculation menu for individual bridge” at the bottom of the scenario primary selection screen 501 in FIG. 14 is clicked. Thereby, the LCC calculation main menu 85 of the individual bridge of FIG. 9 is displayed.
Select another bridge from the bridge selection menu 87, click the “Select primary scenario” button 91, and repeat the primary scenario selection process according to the procedure described above to select the primary scenario for all bridges. It is possible to execute.

(3-2-2. Future prediction of soundness)
Next, the future prediction (s220 of FIG. 6) of the soundness degree performed about the bridge which completed the scenario primary selection is demonstrated.
The future prediction of the soundness level is performed based on the deterioration prediction formula database 51 stored in the database 5 and the scenario primary selection result 49 selected by the primary selection of the scenario and stored in the database 5.
First, the deterioration prediction formula will be described.
The degradation prediction methods are roughly classified into a theoretical degradation prediction method and a method based on field data, but it is difficult to apply theoretical degradation prediction to all members. In the bridge asset management support system of this embodiment, based on the theoretically elucidated deterioration mechanism and expert knowledge, based on the five-stage soundness evaluation, create a deterioration prediction estimation formula for each deterioration mechanism, Based on this, deterioration prediction is performed, and a method of improving the accuracy of the deterioration prediction estimation formula by accumulating inspection results is adopted.

FIG. 20 is an example of a deterioration prediction estimation formula.
The deterioration prediction formula is created for each type of member (for example, a steel member for superstructure) and a deterioration mechanism (for example, salt damage, neutralization, etc.). FIG. 20 is a deterioration prediction formula for coating film deterioration and corrosion of steel members. Also, even in one deterioration prediction formula, the deterioration rate varies depending on the environmental conditions, so that a plurality of deterioration prediction estimation formulas can be set.
In the figure, in a general environment, the soundness of 5.5 at the time of construction drops to less than 4.0 in 20 years, about 2.5 in 30 years, and 1.5 in 40 years. It shows that the soundness level drops very quickly as 3.5 in 10 years and 1.5 in 15 years.
Such a degradation prediction estimation formula is stored in the database 5 as the degradation prediction formula database 51 for each type of member and degradation mechanism.

In the LCC calculation s200 of the individual bridge, after the primary selection s210 of the scenario, the future prediction of the soundness is performed using the data of the deterioration prediction estimation formula database 51 (s220).
In the LCC calculation main menu 85 of the individual bridge shown in FIG. 9, when the selection button 93 of “Future prediction of soundness” is clicked, the future prediction processing s220 of soundness is started, and the future prediction of soundness shown in FIG. The screen 531 is displayed. Here, it is assumed that the bridge A is selected in the main menu 85.
The scenario primary selection result is displayed on the upper portion of the screen 531 together with the information 533 of the location of the selected bridge A and the service start time (535).
When the soundness future prediction process s220 is activated, it automatically executes a future prediction of the soundness of all members constituting the bridge. Here, a floor slab will be described as an example.

When a floor slab is selected in the member menu 537, a deterioration prediction estimation formula relating to a member (concrete floor slab) and a deterioration mechanism (floor fatigue deterioration) is read from the deterioration prediction estimation formula database 51. Which deterioration prediction estimation formula is to be read is determined based on the data and inspection data of the bridge basic database 21 stored in the database 5, for example. That is, the material name of each member constituting the bridge is stored in the bridge basic database 21. Here, the member data of the floor slab of the bridge A is read from the bridge basic database 21, and further the deterioration mechanism is determined from the inspection data. A deterioration prediction estimation formula can be determined by reading that the slab fatigue.
In addition, it is also possible to determine the severity of the environment from data on the environment of the bridge stored in the bridge basic database 21 and to determine the deterioration rate of the deterioration prediction estimation formula to be applied.

In FIG. 21, the general environment degradation prediction estimation formula 541 is selected and displayed.
For example, from the inspection data of 2004, the 2004 soundness level regarding the element of the floor slab can be known. The soundness data is read from the inspection database 23 of the database 5.
In FIG. 21, the soundness level based on the inspection data is 3.7. Bridge A started in service in 1985, and 2004 was 19 years after the start of service. According to the degradation prediction estimation formula 541, the soundness reached 3.7 in the 26th year. From this difference, it can be seen that the floor slab of Bridge A is deteriorating at a faster rate than originally expected.
Based on the difference between the deterioration prediction estimation formula and the soundness evaluation result at the time of inspection, the deterioration prediction estimation formula is corrected to obtain a corrected deterioration prediction formula 543.

When the corrected deterioration prediction formula 543 is obtained, it is possible to estimate the timing for taking countermeasures more accurately.
For example, in the case of the bridge A, if the scenario A2 is selected, the allowable soundness level is 4, so the countermeasure is taken at a soundness level of 4.0 or less. The soundness of the selected element has already fallen below the allowable soundness, and countermeasures will be implemented at the earliest possible time, for example, in fiscal 2005 (20 years after the start of service). On the other hand, if scenario B1 or B2 is selected, since the allowable soundness level is 3, measures will be taken 24 years after the start of service when the soundness level drops to 3.0.

FIG. 22 is future prediction data of soundness, taking as an example the case where scenario B1 is selected.
In scenario B1, measures are taken when the soundness level becomes 3 (24 years after the start of service), and the soundness level is restored to 4.5. Thereafter, the soundness level again decreases in the same manner, so that the second measure is implemented 35 years after the start of service when the soundness level becomes 3.0 again, that is, 11 years after the first measure. Furthermore, similarly, it is understood that the third countermeasure may be implemented 46 years after the start of service, that is, 11 years after the second countermeasure.
The data obtained as described above is stored in the database 5 as the soundness future prediction result 53. That is, for example, bridge A-slab-scenario B1- countermeasure period: 24 years, 35 years, and 46 years after the start of operation are stored as the soundness future prediction result 53.

  Although the case of scenario B1 of the floor slab of bridge A has been described, the same processing is performed for other scenarios, that is, scenario A2 and scenario C1, and the obtained soundness future prediction result 53 is stored in the database 5. Similar processing is performed for all selected scenarios of all bridges.

(3-2-3. Calculation of LCC by scenario)
After executing the soundness future prediction process s220, click the selection button 545 of the “LCC calculation main menu for individual bridge” at the bottom of the soundness future prediction screen 531 in FIG. Return to the menu (FIG. 23). When the “scenario-specific LCC calculation” selection button 95 in the main menu 85 of FIG. 23 is selected, the scenario-specific LCC calculation process s230 is activated.

FIG. 24 is a flowchart showing a flow of scenario-specific LCC calculation processing.
First, the bridge basic database 21 is read from the database 5 for the target bridge for which the scenario-specific LCC is obtained (s231). This is because the data on the area and volume of each element, the data on the scaffold area, and the like in the basic bridge database 21 are used when calculating the LCC.
Next, referring to the primary selection result 49 of all bridge scenarios in the database 5, the scenario primary selection result of the target bridge is read, the number of selected scenarios is K, the kth scenario is S (k), k = 1 to K is set (s232). Further, 1 is substituted for n used as a pointer (s233).

First, the LCC for the first scenario is calculated (s234 to s236). That is, the countermeasure year for the scenario S (n) of the target bridge is read from the soundness future prediction result 53 stored in the database 5 (s234). That is, in the case of the scenario B1 of the bridge A described above, data indicating that countermeasures will be implemented for the floor slab in 24, 35, and 46 years after the start of operation is stored in the soundness future prediction result 53. .
The LCC for the scenario S (n) of the target bridge is calculated (s235). At this time, a scenario-specific countermeasure construction method database 55 which is data obtained by classifying the unit cost of the construction cost required for the countermeasure by member, deterioration mechanism, and scenario is read from the database 5.
FIG. 25 is an example of data registered in the scenario-specific countermeasure construction method database 55. The countermeasure method and unit price for materials (superstructure) and deterioration mechanism (salt damage) are shown for each scenario. That is, in the case of scenario A1, a surface treatment is performed as a countermeasure method, and the unit price per unit area is, for example, 10,000 yen, and in A2, it is 5000 yen. Further, in scenario B1, a small-scale cross-sectional repair and reinforcing steel bar are implemented, and the unit cost and the unit price are shown for each scenario such as a unit price of 50,000 yen.

The LCC is the total of the direct construction cost, indirect cost and management cost for implementing the countermeasure method. The direct construction cost was calculated by multiplying the unit cost of the countermeasure method read from the scenario-specific countermeasure method database 55, the cost of the target member multiplied by the quantity such as the area read from the basic bridge database 21, and the scaffold unit price by the scaffold area. Calculate by adding the scaffolding cost.
The indirect costs are calculated as a times the direct construction costs (a is a predetermined coefficient), and the management costs are calculated as b times the sum of the direct construction costs and the indirect costs (b is a predetermined coefficient).
Life cycle cost for scenario S (n) of the target bridge by adding direct construction cost, indirect cost, and management cost for each countermeasure year when scenario S (n) is selected for all members of the target bridge Is calculated by year (s235). When implementing measures for a plurality of members in the same year, costs for the plurality of members are added. When the life cycle cost for scenario S (n) is calculated for all members, the result is stored as bridge / scenario-specific LCC calculation result 57 in database 5 (S236).

Next, when n is incremented by 1 and n is less than K (no in s238), the processing of S234 to S236 is performed for the next scenario S (n) of the target bridge, and the scenario S ( The cost of the countermeasure year corresponding to n) is calculated and stored in the database 5.
The processes of s234 to s238 are repeated for the number of scenarios selected for the target bridge (K). When n = K in s238, the obtained LCC calculation result is displayed (s239), and the process is terminated.

FIG. 26 is an example of the LCC calculation result stored in the bridge-scenario-specific LCC calculation result 57. For one scenario selected for the target bridge, the breakdown of direct construction costs (measure construction materials and scaffolding costs), indirect costs, and management costs are shown by year.
FIG. 27 is an example of a display screen of the LCC calculation result (s239).
For the scenario primary selection results (A2, B1, B2, C1) for the bridge AB, the LCC for each scenario, the cumulative amount comparison, and the breakdown are shown.
In the scenario-specific LCC, the cost for each year is shown as a bar graph, and the accumulated amount is shown as a line graph. It can be seen that the year in which countermeasures are implemented differs for each scenario, and the cumulative amount of LCC varies depending on the scenario. Generally, preventive maintenance scenarios such as scenarios A1 and A2 cost a lot in the initial stage, but the LCC cumulative amount is small, and the post-conservation scenarios B1 to C1 have a low initial cost, but the LCC cumulative amount Will be more.

FIG. 27 shows the LCC calculation result for one bridge. The above-described scenario-specific LCC calculation process s230 is repeated for all bridges, and the LCC is calculated for each selected scenario for all bridges. Stored in the database 5 as the LCC calculation result 57 by bridge / scenario.
With the above processing, the individual bridge LCC calculation processing s200 is completed. When the processing is finished, the screen returns to the main menu 85 for calculating the LCC of the individual bridge shown in FIGS. 9 and 23, and the selection button 99 for “to the whole main menu” in the lower left is clicked to enter the whole main menu 71 of FIG. Return.

(3-3. Preparation of medium- to long-term budget plan)
After completing the LCC calculation of the individual bridges for all the bridges, the medium- to long-term budget plan creation process S300 is executed. The medium- to long-term budget plan creation process S300 is started by selecting a “medium-to-long-term budget plan creation” selection button 301 in the overall main menu 71.
As shown in the flowchart of FIG. 6, when the medium- to long-term budget plan creation process s300 is started, a scenario is first selected (s310). This is a process for selecting one scenario for all bridges. In the first stage, the LCC calculation result 57 for each bridge and scenario in the database 5 is referred to, and the accumulated amount of LCC is minimized for each bridge. Select a scenario.
Next, for the selected scenario, the LCC calculation results of all the bridges are taken out from the database 5.

FIG. 28 is a display example of medium- and long-term budget creation.
First, as a first step, a scenario that minimizes the accumulated amount of LCC is selected for each bridge. Then, a value obtained by dividing the accumulated life cycle cost by the number of years in the life cycle period for the life cycle period (for example, 30 to 50 years) that is a target of the medium- to long-term budget plan is set as the annual budget.
Compare this year's budget with the cost of all bridges in each year. If this cost exceeds the annual budget, the excess is carried over to the next fiscal year, and if it is below the annual budget, the next year is carried forward. For example, if the annual budget is 1 billion yen and the cost for the first year is 2 billion yen, the excess 1 billion yen is carried over to the second year. Then, for example, 500 million yen, which was the cost of the second year, is carried over to the third year. Such work is repeated.
At this time, the carry-over amount is limited. In other words, the delay limit at which repair / repair measures can be performed using the same method can be determined empirically. If this is three years, the work described above is performed for the entire medium- to long-term, and the amount carried over is the delay limit. In other words, if the budget is within the three-year budget, it is determined that the budget has been leveled. Furthermore, if the total life cycle cost is within the range of the medium-term budget target, it is judged that the mid- to long-term budget is consistent (yes in s330), and measures are taken according to the combination of scenarios for each bridge initially set. In such a case, the “Mid-to-long term budget determination” selection button 555 at the lower right of the screen is selected, and the creation of the medium to long term budget is completed (s340). When the medium- to long-term budget preparation is finished, the determined setting scenario for all bridges is stored in the database 5 as the medium-to-long-term plan preparation data 63.

On the other hand, if the carry-over amount exceeds the delay limit, it is determined that the combination of the previous scenarios cannot achieve the leveling of the medium- to long-term budget and cannot be matched with the medium- to long-term budget (no in s330).
That is, as shown in Figure 28, if the annual budget is 1 billion yen and the cost for the first year of fiscal 2005 is 3 billion yen, the amount carried over to the second year is 2 billion yen and the allowable carry-over amount is 3 billion yen It can be carried over to the second year. If the cost for the second year is 1.5 billion yen, the amount carried over to the third year will be 2.5 billion yen, which can also be carried over to the third year. However, if the cost in the third year is 1.6 billion yen, the amount carried over to the fourth year will be 3.1 billion yen, exceeding the allowable carry-over amount of 3 billion yen (budget for three years).
Therefore, it is judged that the mid- to long-term budget cannot be leveled with this scenario combination.
In such cases, one of the bridge scenarios needs to be changed to fit within the budget. A selection button 553 for “reselect scenario” is clicked, the scenario is changed, and the scenario is reselected (return to s310).

The number of bridges can be as high as several hundred, and for each bridge, multiple scenarios are selected in the primary scenario selection. Therefore, the medium- to long-term LCC is calculated for all combinations of scenarios for all bridges. The amount of calculation is enormous and not realistic.
Therefore, a rule for changing the scenario is created, and this is changed efficiently. Here, as an example of a rule, a period before the year when the amount carried forward is the maximum is set as the cost reduction target period, and a scenario in which the amount of cost reduction during this period is large and the cumulative cost of LCC is small is selected in order. A method of changing will be described. That is, the cost reduction amount during the cost reduction target period due to the scenario change is set as B, the increase amount of the accumulated LCC cost is set as C, and the scenario change in which the value of B / C becomes large is selected.

FIG. 29 is a flowchart showing a flow of scenario change index calculation processing.
First, the bridge number pointer i is set to 1 (s301). Further, the scenario primary selection number for the bridge i is M (i) (s302). Further, a pointer m indicating the priority order of a plurality of scenarios selected in the scenario primary selection is set to 1 (s303).
Next, a cost reduction amount B for the cost reduction target period due to the scenario change is obtained. That is, for the bridge i, the difference (reduction amount) in the cost reduction target period when the currently selected scenario with the first priority and the scenario (m + 1) is used is obtained as B (i). (S304).
Next, an increase C in the accumulated amount of LCC is obtained. That is, for the bridge i, the increase amount of the scenario-specific LCC when the scenario with the first priority and the scenario (m + 1) is used is obtained and set as C (i) (s305).
Then, the value of B (i) / C (i) is obtained and set as F (i, m) (s306). Thus, the ratio of the cost reduction amount B and the LCC increase C in the cost reduction target period when the scenario is changed to the priority (m + 1) th scenario is calculated and stored as F (i, m).

If m is incremented by 1 (s307) and the value of m is less than the primary scenario selection number M (i) of the bridge i (no in s308), the process returns to s303, and B / C for all primary selection scenarios. Is determined as F (i, m).
If B / C has been obtained for all primary selection scenarios of bridge i (yes in s308), the value of i is incremented by 1 (s309), and if processing has not been completed for all bridges (no in s311) , Returning to s302, the process (s302 to s308) for obtaining the value of B / C is repeated for all the changes in the primary selection scenario. If B / C is calculated for the primary selection scenario of all bridges in s311 (yes), the obtained B / C (F (i, m)) is rearranged in descending order (G (j), j = 1) ~) (S312), the value of G (j) and the corresponding F (i, m) are displayed (s313).

FIG. 30 is a display example of a scenario change for medium- to long-term budget creation.
In the upper part of the display, B / C values calculated by the above-described scenario change index calculation processing (s301 to s313) are displayed in descending order, and the corresponding bridge numbers and the scenarios before and after the change are displayed. (563). As shown in the figure, when the scenario of the bridge with the bridge number 6 is changed from A1 to A2, it can be seen that B / C is 5 and the maximum.
The scenario change that maximizes the B / C is considered to be the best. For example, when the user of the system clicks the column with the B / C value of 5 in the scenario change index list 563, In particular, a process for changing the scenario of bridge number 6 from A1 to A2 is started. That is, first, the total bridge LCC is recalculated (s320). Then, the value obtained by dividing the LCC cumulative amount of all bridges by the number of years in the life cycle period is used as the annual budget. The cost and the annual budget for each fiscal year are compared and carried forward and forwarded. A leveling determination is performed as to whether or not the delay limit is satisfied (s330).

As shown in FIG. 30, the LCC leveling result 565 due to the scenario change is displayed at the bottom of the table 563 of the scenario change index B / C.
In the figure, due to the change in the scenario, the cost for FY2005 was 2.5 billion yen, which resulted in a 2 billion carry-over amount of 2 billion yen and a 3rd year carry-over amount of 2.6 billion yen, which were within the limits of delay. Settled. Clicking the “Leveling determination” selection button 559 to determine whether or not the leveling process can be realized over the entire medium- to long-term period, the carry-over amount falls within the delay limit over the entire life cycle period. If leveling is possible to the right of the selection button 559, it may be displayed that the leveling is completed.
If leveling cannot be performed within the delay limit, leveling is impossible (no in s330), and the process returns to the scenario selection process (s310) again until the above process can be leveled. repeat.

  Based on the engineering knowledge that the rules for leveling by carrying over and moving forward are relatively slow and the degree of application soundness of countermeasure work varies to some extent. ing. In general, the service life of members constituting a bridge is considered to be 50 years or more. When 50 years are divided into five deterioration (soundness) stages, the period of one stage is 10 years on average. Since the countermeasure method can be applied to one or more deterioration stages, if the countermeasure period determination in the LCC calculation is set to the intermediate period of the deterioration stage, the same countermeasure can be applied even if the countermeasure implementation is delayed by five years. You can think about it. Based on such engineering knowledge, even if there is a delay in construction for several years due to over budget, the same measures can be taken, but a slight over budget is allowed. It is required, and it is necessary to finally confirm its validity at the mid-term business plan stage.

As described above, the combination of scenarios satisfying the medium- to long-term budget is determined from the primary scenarios selected in the LCC calculation of the individual bridge s200 for all the bridges by the medium- to long-term budget creation s300 (s340). The determined combination of scenarios is stored in the database 5 as medium- and long-term budget plan creation data 63.
When the creation of the medium- and long-term budget plan is completed, the selection button 557 of “Return to overall main menu” in the lower left of the screen of FIG. 30 is clicked to return to the overall main menu 71 of FIG.
Next, in order to create a medium-term business plan, a “medium-term business plan creation” selection button 401 in the overall main menu 71 is clicked. Thereby, the medium-term business plan creation process s400 is started.

(3-4. Medium-term business creation process)
When the medium-term business plan creation process s400 is started, first, a main menu 565 for a medium-term business plan as shown in FIG. 31 is displayed. The medium-term business plan creation process s400 includes extraction of measures s410 scheduled to be implemented in the first medium-term and second medium-term, and determination of priority of measures satisfying the medium-term budget (s420 to s440).
As shown in FIG. 31, for example, a selection button 567 for “extracting first and second medium-term countermeasure bridges” and a selection button 569 for “measure order determination processing” are provided on the main menu screen of the medium-term business plan. It is done.
(3-4-1. Extraction of countermeasure bridges)
When the selection button 567 (“extraction of first and second medium-term countermeasure bridges”) is clicked, countermeasure bridge extraction is executed (s410). That is, referring to the medium- to long-term plan creation data 63 created in the medium-to-long-term budget plan creation s300 and stored in the database 5, the countermeasure bridge planned to be implemented in the first two medium-terms, that is, the first mid-term and the second mid-term Is extracted from it.
Then, for example, as shown in FIG. 32, bridge countermeasures (list) to be implemented in the first medium term and the second medium term are displayed (573). In the figure, the name of the bridge scheduled to be implemented in the first medium term and the second medium term, the countermeasure year, the countermeasure contents, the construction cost, etc. are displayed as a list 575. As the countermeasure contents, the name of the member to which the countermeasure is taken and the countermeasure construction method are displayed.
In addition, a “display by bridge” selection button 577 is provided in order to display the countermeasure bridges in the first and second medium periods by bridge. A selection button 579 for “to mid-term business plan main menu” below is a selection button for returning to the main menu 565 of the medium-term business plan in FIG. 31.

When the selection button 577 (“display by bridge”) is selected, for example, as shown in FIG. 33, the countermeasure bridges in the first medium period and the second medium period are displayed by bridge (581). On the screen, a bridge selection menu 583 for selecting a bridge to be displayed is displayed. By clicking a bridge name to be displayed, measures to be implemented for the selected bridge in the first medium term and the second medium term are as follows. Each member is displayed as a graph and a numerical value (585).
In the figure, for the A bridge, for the slab, superstructure, substructure, and others, the costs for each year of the first medium term and the second medium term are displayed in numerical values and graphs, and the total amount is displayed in numerical values.
By selecting a selection button 587 for “to medium-term business plan main menu”, the display returns to the main menu 565 of the medium-term business plan in FIG.

(3-4-2. Countermeasure ranking determination process)
Next, the countermeasure order determination processes s420 to s440 are started by clicking the “measure order determination process” selection button 569. First, the countermeasure order determination process s420 is executed.
The countermeasure order determination gives an early countermeasure order to countermeasures for which countermeasure costs are recorded at an early stage in the first medium term and the second medium term. Therefore, the countermeasure order is obtained as follows.
FIG. 34 is a diagram showing a flowchart of the measure ranking calculation process used for determining the measure ranking, and FIG. 35 is an explanatory diagram of the measure ranking calculation.
First, a pointer i indicating a bridge number is set to 1 (s421). Next, for each member (floor slab, superstructure, substructure,...), The total countermeasure costs for the first medium term and the second medium term were calculated, and Ti (floor slab), Ti (superstructure), Ti (substructure),... (S422). In the explanatory diagram of FIG. 35, the total amount of the floor slab is 1100, the upper work is 800, the lower work is 600, and the others are 200.
Next, a value of 50% of each Ti is obtained and set as Ti ₅₀ (s423). In the explanatory diagram of FIG. 35, T ₅₀ is the floor slab 550, the upper work 400, the lower work 300, and the other 150.

Then, the number of years until the Ti ₅₀ is reached is calculated and set as the countermeasure rank Yi ₅₀ (s424).
That is, when the deck of Figure _35, since more than 550 _{T 50} at 1 _{year, Y 50} is 1, _{Y 50} since superstructure exceeds the 7 year 7, substructure is _Y 50 = 2, Other Becomes Y ₅₀ = 8.
This process (s422-424) is performed about all the bridges extracted as a countermeasure bridge of the 1st middle term and the 2nd middle term. That is, when i is incremented by 1 (s425) and the countermeasure rank is not calculated for all the bridges (no in s426), the process returns to s422, the countermeasure rank calculation processing is executed, and the countermeasure rank calculation for all the bridges is performed. When the processing is completed (yes in s426), the countermeasure ranking Y value is small, that is, sorted and displayed in the order of countermeasures in the early countermeasure ranking (s427).
FIG. 36 is an example of a display showing the contents of countermeasures sorted in descending order of countermeasure order. As shown in the figure, the countermeasure contents (members and construction method), bridge name, and countermeasure rank Y values are displayed in descending order of the countermeasure rank, that is, in ascending order of the countermeasure rank Y (591).

In the above processing, the order of measures is determined by paying attention only to the timing of occurrence of the measure costs, and measures for different bridges are mixed and arranged. There are cases where countermeasures can be carried out using a common scaffold, or cases where construction is done together leads to cost reduction. With respect to such countermeasure construction, processing for changing the countermeasure order so that construction can be performed simultaneously is executed next.
The user of the system refers to a countermeasure order table 591 as shown in FIG. 36, searches for a work that is desired to be put together, clicks a countermeasure work to be put together, and drags it to a position to be moved.
That is, in the case of FIG. No. 6 A bridge expansion and contraction device is No.6. No. 1 because it will lead to cost reduction if installed together with the floor slab of No. 1 (steel plate adhesion). Click on the row 6 Drag below 1

As a result, the screen changes as shown in FIG. That is, no. The telescopic device for Bridge A, which was 6, was No. It has been moved to position 2, and 5 → 1 is displayed in the measure ranking item. Subsequent countermeasures will be postponed.
It is possible to move any number of countermeasures that should be performed at the same time.
In FIG. Click on the support for Bridge C of No. 7, Drag under the 4 digit paint. As a result, the screen changes as shown in FIG. That is, no. No. 7 is the support for Bridge C. 5 and the contents of the countermeasure after that are deducted, and 5 → 3 is displayed in the item of countermeasure order.

(3-4-3 Mid-term budget alignment)
When all the transfer of countermeasure work that should be performed at the same time is completed, the mid-term countermeasure cost calculation s430 and the matching s440 are executed.
When a “medium term budget matching” selection button 593 on the right side of the screen of FIGS. 36 to 38 is clicked, medium term budget matching processing (s430 to s440) is started.
As shown in FIG. 38, the construction cost of the countermeasure work is totaled in the order of the final countermeasure order, and the year in which the countermeasure contents are implemented is determined so as to satisfy the annual budget. That is, no. The construction cost for countermeasure work will be added in order from 1, and if it exceeds the annual budget, it will be implemented in the next fiscal year.
FIG. 39 is a display example showing the mid-term budget matching processing result. No. The planned implementation year is entered in order from 1 (597).

In the above processing, since the order of countermeasures for countermeasures that are cheaper when constructed at the same time is raised, the order of countermeasures for other countermeasures is lowered. Therefore, a time limit determination process is performed to determine whether the construction period of the countermeasure work to be performed in the first medium period and the second medium period is not too late. It is activated by clicking a “time limit determination” selection button 599 on the right side of the screen of FIG.
FIG. 40 is a flowchart showing the flow of time limit determination processing.
The time limit is a year when a certain percentage (α%) of the member elements to be subjected to the countermeasure work to be constructed in the first medium term and the second medium term is less than the allowable soundness level. α is determined in advance, for example, 10%.
First, 1 is added to the countermeasure work number i (s441). Next, a year in which α% (for example, 10%) of all elements that are the target of the countermeasure work i falls below the allowable soundness level of the selected scenario is calculated and set as a time limit year L (s442).
When the construction year of the countermeasure work i is later than the time limit year L (yes in s443), the time limit year L is displayed on the screen to prompt the system user to reconsider the countermeasure order (s444). When construction is performed earlier than the time limit year L, i is incremented by 1, and the processing from s442 to s444 is repeated for the next countermeasure construction i. When the time limit determination of all countermeasure works is completed (yes in s446), the process is terminated.

FIG. 41 is a display example of a screen that displays the time limit year L and prompts reconsideration.
On the right side of the planned construction year of countermeasure work, the time limit year is displayed for the countermeasure work that exceeds the time limit year, and reconsideration is encouraged (601).
In FIG. The time limit year of the expansion device for the 8 F bridge is displayed as 2005.
The user of the system refers to the display of the time limit year, and after reconsideration, to change the construction time, click the line and drag it to the destination.
FIG. 42 shows the construction time of the extension device for the F bridge that exceeded the time limit year. The example which moved to the position of 3 is shown. The planned fiscal year has been raised from 2008 to 2005.

If the construction year of the countermeasure work is moved due to the excess of the time limit year, the matching process with the medium-term budget is executed again. When the “Mid-term budget alignment” selection button 593 on the right side is selected, it is determined whether or not the annual budget is satisfied in the same process as the above-described medium-term budget alignment process. The process is carried forward by one year.
With the above processing, the construction sequence of repair / repair measures construction that satisfies the medium- to long-term budget and satisfies the medium-term budget and the annual budget is determined for each year of the first medium-term and second medium-term.

The present invention is not limited to the embodiment described above, and various modifications are possible, and these are also included in the technical scope of the present invention. For example, although the present embodiment has been described for a bridge, the present invention is not limited to a bridge, and can be used for a business plan for maintaining and updating various structures belonging to prefectures, municipalities, and the like. In addition, we did not explain the contents of measures for renovation and renewal, but in case of renovation and renewal, we decided on remedial work to satisfy the renovation and renewal budget for the medium- to long-term, medium-term, and fiscal year using the same procedure and similar processing. Is possible.
Further, the display content, display method, process selection method, and the like of the screen are not limited to the method of the present embodiment, and various expressions, selection methods, and the like are possible.

The block diagram which shows the structure of the bridge asset management support system 1 concerning embodiment of this invention Configuration diagram of computer system 3 Display screen example of portable information terminal 7 Display screen example of inspection database 23 Illustration of bridge element Flow chart showing the processing flow of the bridge asset management support system Overall main menu screen of the bridge asset management support system Basic strategy support screen Main menu screen for LCC calculation of individual bridges List of maintenance management scenarios Illustration of maintenance scenario Flow chart showing the flow of scenario primary selection process Scenario primary selection screen Scenario primary selection screen (2) Flow chart showing the flow of bridge health calculation processing Table explaining the weighting method for each member Scoring chart for importance evaluation All bridge importance data list screen Screen of primary scenario selection results for all bridges Explanatory drawing of degradation prediction estimation formula Soundness future prediction screen Illustration of soundness future prediction Main menu screen for LCC calculation of individual bridges Flow chart showing the flow of scenario-specific LCC calculation processing Explanatory diagram of countermeasure method data by scenario Illustration of LCC calculation results Screen display example of LCC calculation results Sample screen for creating a medium- to long-term budget plan Scenario change process flowchart Medium- to long-term budget planning-leveling screen display example (1) Example of main menu screen for medium-term business plan Sample screen of countermeasure work list Sample screen of countermeasure work list (by bridge) Flow chart of countermeasure order calculation processing Explanatory diagram of countermeasure order Sample screen of measure ranking calculation results Sample screen for changing the order of countermeasures (1) Sample screen for changing the order of countermeasures (2) Sample screen for medium-term budget alignment Time limit judgment process flowchart Screen example of time limit judgment (1) Screen example of time limit judgment (2)

Explanation of symbols

1 ……… Bridge asset management support system 3 ……… Computer system 5 ……… Database 11 ……… Inspection support means 13 ……… Basic strategy development support means 15 ……… Individual bridge LCC calculation means 17… …… Medium-to-long-term budget plan creation means 19 ……… Medium-term business plan creation means

Claims (14)

An asset management support system consisting of a database system and a computer for maintaining and updating multiple structures such as bridges.
Maintenance update life cycle cost calculation means for calculating maintenance update life cycle cost for each structure,
Based on the maintenance and renewal life cycle cost data for each structure calculated by the maintenance and renewal life cycle cost calculation means, the maintenance renewal life cycle cost for all structures is calculated and the budget constraint is satisfied. Medium- to long-term budget plan creation means to create a medium- to long-term budget plan,
Based on the medium- to long-term budget plan created by the medium- to long-term budget plan creation means, medium-term business plan creation means for determining the contents of the repair / repair measures business and update measures business to be carried out in each year;
An asset management support system characterized by comprising:   The maintenance management renewal life cycle cost calculation means calculates the maintenance renewal life cycle cost for each of the plurality of maintenance renewal scenarios selected according to the special circumstances, soundness and importance of the structure. The asset management support system according to claim 1, wherein:   The maintenance management renewal scenario defines an acceptable level of soundness as a maintenance goal, and implements appropriate measures at a predetermined time so that the soundness of members constituting the structure does not fall below the allowable level. 3. The asset management support system according to claim 2, wherein the scenario is a defined scenario.   The maintenance management update life cycle cost calculation means is set for each selected scenario, health deterioration prediction data stored in the database system for each structural part, material, and deterioration mechanism of the structure, and for each scenario. 3. The asset management support system according to claim 1, wherein the maintenance management renewal life cycle cost of each year of the structure is calculated from data on the countermeasure period, countermeasure method and countermeasure cost.   The medium- to long-term budget plan creation means determines a combination of scenarios satisfying a medium- to long-term maintenance budget constraint and an update budget constraint from a plurality of scenarios selected for each structure. 2. The asset management support system described in 2.   If the medium- to long-term maintenance budget has a leveling restriction that keeps the budget for each fiscal year constant, the maintenance management update life cycle costs of all structures calculated by the maintenance management update life cycle cost calculation means are aggregated. If the cost exceeds the annual budget in order from the first year, the excess is carried forward to the next year. If it is lower, we will sequentially carry out the work for bringing forward the next fiscal year ahead of time, and determine whether the carry-over amount is within the delay limit of countermeasure construction required empirically to determine budget leveling. 6. The asset management management support system according to claim 4 or 5, characterized in that:   The said annual budget is set to a stepwise value so that the total amount of the life cycle period of the said annual budget may become equal to the total amount of the maintenance management renewal life cycle cost of a life cycle period. The asset management support system described.   The medium- to long-term budget plan creation means calculates a maintenance update life cycle cost for all structures by selecting a scenario according to a priority set in advance for each structure as a combination of the scenarios, and the leveling 8. The scenario according to claim 6, wherein when it is determined that leveling is not achieved, the scenario of the structure is changed to search for a combination of scenarios that passes the leveling determination. Asset management support system.   9. The asset operation management support system according to claim 8, wherein the priority order is a priority order with a minimum maintenance management update life cycle cost.   When changing the scenario of the structure, the cost reduction effect before the fiscal year when the judgment of leveling is rejected is large, and the increase in the accumulated life cycle cost of maintenance and renewal of the structure due to the scenario change is small 9. The asset management support system according to claim 8, wherein the scenario is changed so that   The medium-term business plan creation means includes first, second from the scenario determined by the medium- to long-term budget creation means and determined for each structure stored in the database system and maintenance management update life cycle cost data. The repair / renovation measures and renewal measures to be implemented in the second medium-term period are extracted by type of material and construction, listed in the order of maintenance management measures to be implemented early in the first and second medium-term periods, and the same structure. 3. The implementation year is determined in accordance with a budget for each fiscal year by changing the implementation period so that a plurality of maintenance management renewal measures that simultaneously reduce the number of maintenance and renewal measures are implemented. Asset management support system. In an asset management support system consisting of a database system and a computer that performs maintenance management and update management of multiple structures such as bridges.
Maintenance management renewal rifle cycle cost calculation process for calculating maintenance renewal lifecycle cost for each structure,
Based on the maintenance management renewal life cycle cost data for each structure calculated by the maintenance renewal life cycle cost calculating means, a medium- to long-term maintenance renewal life cycle cost for all structures is calculated, and the budget is calculated. A medium- to long-term budget planning process to create a medium- to long-term plan that satisfies the constraints;
Based on the medium- to long-term budget plan created by the medium- to long-term budget plan creation means, a medium-term business plan creation step for determining the content of maintenance management update measures to be implemented in each medium-term year,
An asset management management support method characterized by comprising:   A program for causing a computer to function as the asset management support system according to any one of claims 1 to 12. A recording medium recording a program for causing a computer to function as the asset management support system according to any one of claims 1 to 12.

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