JP2002131216A - System and method for evaluating degradation of concrete structure taking into consideration of meteorological environment and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for easily and efficiently evaluating a plurality of degradation factors of concrete structures using a computer, through the use of a geographical information system and a plurality of databases. SOLUTION: Topographical data 901 for display, main road data 903 for evaluation, railway line data 905 for evaluation, data 907 on representative points parts over the entire country for evaluation, meteorological environment data 909, regional characteristics data 911 on the mix proportion of concrete, etc., are stored in the database 9. A computer 3 is used by a user in the degradation evaluating system 1, in an interactive manner for evaluating the degradation of concrete structures in all parts of the region. When the user specifies a concrete structure to be evaluated, evaluated value and rank are computed for each evaluation item and are displayed on a display 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and a system for quantitatively evaluating deterioration of a concrete structure due to salt damage, neutralization, frost damage and cracking.

[0002]

2. Description of the Related Art Concrete structures constructed during the postwar high growth period have been deteriorating after more than 30 years and have become a social problem. In recent years, salt damage,
Attention has been paid to the relationship between degradation such as neutralization, frost damage and cracking and the weather environment, and much research has been conducted.

[0003] Regarding the relationship between the weather environment and the deterioration of concrete structures, weather environment conditions that are considered to affect the deterioration are arranged in the form of a paper map. For example,
"Durability Expert Committee Report D-1 Map of Factors Impairing Durability" compiled by the Japan Cement Association (April 1985
Month).

As an example of a study on the relationship between neutralization, salt damage and frost damage and the weather environment in concrete structures nationwide in Japan, see the Japan Concrete Institute Association, "Durability Design of Reinforced Concrete Structures." Concept ”(Research Committee on Durability Design of Reinforced Concrete Structures, 199
There is 1).

[0005]

However, in the paper map under the above-mentioned weather environment conditions, only the statistical values of the weather environment are arranged in the paper map. In this study, the deterioration of concrete structures is evaluated. Absent.

[0006] In the above-mentioned “Thinking about Durability Design of Reinforced Concrete Structure”, the research results show macro results on papers, and it is difficult to use them in practice. In addition, there is no practical method for evaluating the deterioration of concrete structures taking into account the complex environmental degradation in consideration of the complex environmental conditions.

A geographic information system (Geographic)
There is no case where the Hic Information System is used for deterioration evaluation of concrete structures.

The present invention has been made in view of such a problem, and an object of the present invention is to use a geographic information system and a plurality of databases to determine a plurality of deterioration factors of a concrete structure by a computer. It is to evaluate.

[0009]

According to a first aspect of the present invention, there is provided a database for storing weather environment data, regional characteristic data of concrete mix, and map data relating to topography, selecting a point, and selecting concrete. Means for calculating a concrete deterioration index based on the weather data, the regional property data of the concrete mix, the terrain data and the property data relating to the concrete structure when the property data relating to the structure is input. It is a deterioration evaluation system of a concrete structure characterized by comprising.

[0010] The deterioration evaluation system according to the first invention, when a user selects necessary data from a database in order to select a concrete structure to be evaluated and inputs characteristic data relating to the concrete structure, The deterioration index and the deterioration rank are calculated and displayed for each evaluation item.

A second invention is a recording medium on which a program for realizing the first invention is recorded.

A recording medium according to a second aspect of the present invention is a recording medium for implementing the system for evaluating deterioration of a concrete structure according to the first aspect. This recording medium can be distributed, and the program can be distributed via a network.

According to a third aspect of the present invention, there is provided a database for storing weather environment data, concrete characteristic area characteristic data and geographical map data. When a point is selected and characteristic data relating to the concrete structure is input, the data relating to the point is entered. A concrete structure deterioration evaluation method comprising calculating a concrete deterioration index based on weather environment data, concrete characteristic region characteristic data, topographical data, and the characteristic data relating to the concrete structure.

According to a third aspect of the present invention, there is provided a method for evaluating deterioration of a concrete structure, wherein a user selects necessary data from a database for selecting a concrete structure to be evaluated, and inputs characteristic data of the concrete structure. Calculate the deterioration index and deterioration rank of concrete structures for each evaluation item.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of a deterioration evaluation system 1 according to an embodiment of the present invention. The deterioration evaluation system 1 has a configuration in which a computer 3, a display 5, a printer 7, and a database 9 are connected.

The user operates the deterioration evaluation system 1 and extracts necessary data from the database 9 in an interactive manner in accordance with an instruction displayed on the display 5 of the computer 3 to obtain characteristic data of the concrete structure to be evaluated. Enter The deterioration evaluation system 1 performs deterioration evaluation of a concrete structure according to a user's instruction, and prints the evaluation result and the like by the printer 7 as necessary.

The database 9 includes display terrain data 90.
1. The main road data 903 for evaluation, the railway line data 905 for evaluation, the national representative point data 907 for evaluation, the weather environment data 909, the regional characteristic data 911 of concrete mix, and the like are stored.

The display terrain data 901 is data of a geographic information system, and is data for displaying terrain on a screen.

Main road data 903 for evaluation, railway line data 905 for evaluation, national representative point data 90 for evaluation
7 is the data of the concrete structure to be evaluated. For example, FIG. 6 shows an example in which railway lines and main concrete structures on the lines stored in the railway line data 905 for evaluation are displayed. The main concrete structures are piers and tunnels. Also, FIG.
An example is shown in which the main concrete structures of the national representative points stored in the national representative point data 907 for evaluation are displayed.
The main concrete structure is a building or the like.

The weather environment data 909 includes an average temperature for 5 years, 10 years, and 20 years, and an average temperature for 5 years, 10 years, and 20 years when the daily maximum temperature is 0 ° C. or more and the daily minimum temperature is −5 ° C. or less. Days, 5 years, 10 years, 20 years average daily range, 5 years, 10 years, 20 years average minimum and average humidity, 5 years, 10 years, 20 years average sea breeze and average wind speed, 5 years, Average illumination time for 10 years, 20 years,
Average rainfall for 5 years, 10 years, 20 years, 5 years, 1
The average snowfall for 0 years and 20 years is recorded as map data. As reference data, latitude and longitude coordinates of the National Meteorological Office and AMeDAS observation points nationwide, which are observation points of weather environment data, are stored in a database.

Regional characteristic data 911 of concrete mix
Is a constant or the like depending on the region of the concrete mixture used in the deterioration index calculation described later.

FIG. 2 is a diagram showing a processing procedure of the deterioration evaluation system 1. Before explaining the procedure of the concrete structure deterioration evaluation, first, the database 9 of the deterioration evaluation system 1 is used.
The function of displaying the data recorded in the memory will be described with reference to FIGS.

The user operates the deterioration evaluation system 1. FIG. 3 is a diagram showing a map data display setting screen.
By pressing a map data display button 45 on the screen 31, a map data display setting screen 51 is developed.

The user inputs various characteristic data of the concrete structure to be evaluated into the concrete-related parameter input section 33 of the screen 31. The characteristic data of the concrete structure include cover thickness, cement type, water-cement ratio, unit cement amount, orientation, elapsed years, and the like.
The evaluation target input unit 35 selects whether the evaluation target is an arbitrary point, a route representative point, or a national representative point. If the evaluation target is an arbitrary point, the user sets the evaluation point setting unit 39
Enter the latitude / longitude or specify the evaluation point on the map. Further, when the calculation initial setting button 37 is pressed, the initial setting of the deterioration evaluation calculation can be performed (the description of the initial setting is omitted). When the calculation execution button 41 is pressed, the evaluation calculation of the set concrete structure is executed. As for the evaluation calculation result of the concrete structure at an arbitrary point, the evaluation value and the rank are displayed for each evaluation item in the potential evaluation result display section 43.

On the map data display setting screen 51 developed after pressing the map data display button 45, a background figure setting section 53, a representative point setting section 55, and an evaluation data setting section 57 are displayed. The user can set map data to be displayed by checking the check button.

The background map setting section 53 sets map display contents of the display topographic data 901 of the database 9. For example, it is possible to set whether or not to display a shoreline, whether or not to display a river, and the like.

In the representative point setting section 55, the concrete structure to be evaluated is selected from among the main road data 903 for evaluation, the railway line data 905 for evaluation, and the national representative point data 907 for evaluation in the database 9. Set whether it is data. The user checks the corresponding check button. If not checked, the evaluation target will not be displayed on the map.

The evaluation data setting section 57 sets the contents of the data display recorded in the weather environment data 909 of the database 9. For example, "Temperature 20" is an average temperature distribution map for 20 years, and "Precipitation 10" is an average precipitation distribution map for 10 years.

When the user checks the "temperature 20" check button on the map data display setting screen 51 and presses the OK button 59, the map data display setting screen 51 shown in FIG. 3 is closed and shown in FIG. A map is displayed.

FIG. 4 shows an example of a screen display of the weather environment data 909 of the database 9. Here, an average temperature distribution map for 20 years is displayed on the map display section 73. Legend display section 71
Shows the display color or display pattern for each range of the average temperature, and the number of target records in each range is shown in parentheses. FIG. 4 shows a state where the average temperature distribution is not displayed on the map display unit 73.

As described above, the user can store various data recorded in the database 9 (display terrain data 901, main road data 903 for evaluation, railway line data 905 for evaluation, nationwide representative point data 907 for evaluation). , Weather environment data 909, etc.) can be displayed by operating the deterioration evaluation system 1.

Subsequently, the deterioration evaluation system 1 will be described with reference to FIG.
5 to 13 will be described with reference to the screen display of the deterioration evaluation system, the method of evaluating the deterioration of concrete, the display of the evaluation result, and the like, while explaining the processing procedure of FIG.

First, the user operates the deterioration evaluation system 1 and selects an object to be evaluated for a concrete structure (step 201). For example, FIG. 5 shows a case where a concrete structure at an arbitrary point is evaluated. Evaluation target input unit 35
Then, "arbitrary point" is selected from "arbitrary point", "route representative point", and "national representative point". After selecting an arbitrary point, input the east longitude and the north latitude, or indicate the evaluation point on the screen. The computer 3 inputs east longitude and north latitude together with necessary data from the display terrain data 901 in the database 9 or pulls out a point designated on the screen to display the data.
To be displayed.

Next, the user inputs the characteristic data of the concrete structure to be evaluated into the concrete-related parameter input section 33 (step 202). The characteristic data of the concrete structure include cover thickness, cement type, water-cement ratio, unit cement amount, orientation, elapsed years, and the like.

When the user presses the calculation execution button 41 in FIG. 5, the deterioration evaluation system 1 extracts the weather environment data 909, the regional characteristic data 911 of the concrete mix, etc. from the database 9 and formulates a calculation formula for each evaluation item. Then, a concrete deterioration index (evaluation value) is calculated (step 203). The salt damage caused by flying salt, salt damage caused by snow melting agent, neutralization, freezing damage, and cracking, which are the evaluation items shown in the potential evaluation result display part 43 in FIG. 5, are respectively the salt damage deterioration caused by the flying salt in step 203 in FIG. 204, salt damage deterioration 205 due to snow melting agent, deterioration 206 due to neutralization,
This corresponds to deterioration 207 due to freezing and thawing and crack deterioration 208.

The method of calculating the evaluation value for each evaluation item will be described later. The deterioration index in step 203 is obtained by using the weather environment data 909 relating to the point selected in step 201 and the regional characteristic data 91 of the concrete mix.
1 or calculated based on the characteristic data of the concrete structure input in step 202. The calculated concrete deterioration index (evaluation value) is normalized by a constant determined for each evaluation item and classified. In FIG. 5, the evaluation values are divided into five ranks, and are ranked A, B, C, D, and E in the order of decreasing concrete deterioration, and are displayed together with the evaluation values on the potential evaluation result display section 43. (Step 209).

That is, assuming that the point selected as the “arbitrary point” is 76 in FIG.
Deterioration indexes such as salt damage caused by flying salt, snow damage caused by snow melting agent, neutralization, frost damage, cracks, and the like are displayed on the potential evaluation result display section 43.

Next, a case where a route representative point is selected as an evaluation target point in step 201 will be described with reference to FIGS. The user inputs the evaluation target input unit 35 shown in FIG.
Then, "route representative point" is selected from "arbitrary point", "route representative point", and "national representative point". Further, the evaluation route setting unit 63 selects a route type. In FIG. 6, “railroad 1” is selected and the screen display button 65 is pressed, so that the map display unit 77 displays the railway lines and the main concrete structures 78 on the routes.

FIG. 7 shows an evaluation result of the evaluation target in FIG. After displaying the railway lines and the main concrete structures on the routes (FIG. 6), the user inputs the characteristic data of the concrete structures into the concrete-related parameter input unit 3.
3 (step 202). When the user presses the calculation execution button 41, the deterioration evaluation system 1 retrieves the weather environment data 909, the regional characteristic data 911 of the concrete mix, and the like from the database 9 and uses the calculation formula for each evaluation item to calculate the concrete deterioration index (evaluation). Is calculated (step 203). The calculated concrete deterioration index (evaluation value) is normalized by a constant determined for each evaluation item, and is classified (here, five levels of A to E).

In FIG. 7, the result distribution diagram display setting section 67
The evaluation item is selected in the display item setting section 68 (here, “neutralization” is selected), and the result distribution map display button 69 is selected.
By pressing, the ranked evaluation targets are displayed on the map display section 79 (step 209). The legend display section 81
Indicates the classification of the neutralization evaluation rank.

That is, as shown in FIG. 7, the neutralization of the railway line to the main concrete structure is evaluated and displayed.

Next, a case where a national representative point is selected as an evaluation target point in step 201 will be described with reference to FIGS. The user inputs the evaluation target input unit 35 shown in FIG.
Then, "national representative point" is selected from "arbitrary point", "route representative point", and "national representative point".

Next, the user inputs the characteristic data of the concrete structure to the concrete-related parameter input section 33 (step 202). The map display unit 83 in FIG.
Before performing the deterioration evaluation, the main concrete structures in the area subject to the deterioration evaluation are displayed. When the user presses the calculation execution button 41, the deterioration evaluation system 1 retrieves the weather environment data 909, the regional characteristic data 911 of the concrete mix, and the like from the database 9, and uses a calculation formula for each evaluation item to determine the concrete deterioration index (evaluation). Is calculated (step 203). The calculated concrete deterioration index (evaluation value) is normalized by a constant determined for each evaluation item, and is classified (here, five levels of A to E). Further, when the result distribution map display button 69 is pressed, the result of the evaluation item selected by the display item selection unit 68 is displayed on the map display unit 83 (in FIG. 8, the result distribution diagram display button 6).
Since 9 is not pressed, the main concrete structures in the Kanto region that are subject to deterioration evaluation are displayed.)

FIG. 9 shows the evaluation results of deterioration (deterioration of salt damage 204 due to flying salt) at national representative points (here, Kyushu, Shikoku and Chugoku regions). When the user selects an evaluation item in the display item setting section 68 of the result distribution map display setting section 67 (here, “salt damage caused by flying salt” is selected) and presses a result distribution map display button 69, a map display is performed. The evaluation target ranked is displayed in the section 85 (step 20).
9). In the legend display section 87, the ranking of the salt damage evaluation rank based on the incoming salt is displayed.

Similarly, FIG. 10 shows an evaluation result of deterioration (salt damage 205 due to snow melting agent) at a representative point in the whole country.
The display item setting section 68 selects "salt damage caused by snow melting agent". FIG. 11 shows an evaluation result of deterioration at a national representative point (deterioration due to neutralization 206). The display item setting section 68 selects “neutralization”. FIG. 12 shows an evaluation result of deterioration (deterioration by freezing and thawing 207) at national representative points. The display item setting section 68 selects “frost damage”.

Next, a method of calculating a deterioration index (evaluation value) of a concrete structure will be described for each evaluation item. Evaluation items are salt damage deterioration 204 due to incoming salt,
Deterioration due to salt due to snow melting agent 205, degradation due to neutralization 20
6, degradation 207 due to freezing and thawing, and crack degradation 208. Note that, in calculating the deterioration index, data input by the user to the concrete-related parameter input unit 33 and various data provided in the database 9 are used.

The indicator of salt damage deterioration due to flying salt is expressed as chloride ion concentration P _SD1 (kg / m ³ ). The chloride ion concentration P _SD1 (kg / m ³ )
From the surface chloride ion C ₀ (k
g / m ^3), the concrete head thickness C (mm), the concrete structure of the characteristic data and chloride diffusion coefficient obtained from the local characteristic data 911 of the concrete mix D _R (cm ² / year), the elapsed time t (Year) and can be obtained from equation (1). (Reference: Japan Society of Civil Engineers Concrete Standard Specification [Construction], 1999)

[0048]

(Equation 1)

Deterioration potential (rank of evaluation value)
Is a value obtained by normalizing the chloride ion concentration P _SD1 by a limit chloride ion concentration (for example, 1.2 kg / m ³ ) and classifies the value into five ranks.

The surface chloride ion amount C in the formula (1)₀
(Kg / m^Three) Indicates elapsed time t (years), sea breeze rate and wind speed
Salt content A calculated from_b(Mg / dm^Two/ Year), average
Temperature H _t(° C.) and is calculated from equation (2).
(References: Yamada / Oshiro / Tanigawa / Ibe, flying salt content and
Study on salt infiltration process into concrete, concrete
Annual Report of REIT Engineering, Vol. 17, No. 1,
1995; others)

[0051]

(Equation 2)

In equation (2), a is the average temperature H _t (°
It is a constant determined from C).

In the formula (1), the chloride diffusion coefficient D _R (c
m ² / year) is calculated from equation (3) using the characteristic data of the concrete structure such as the cement type and the water-cement ratio and the regional characteristic data of the concrete mix. (References: Yamamoto, A., Motohash
i, K. et al, "Propose Durabil
ity Design for RC Marine
Structures, "Concrete Unde
r Severe Conditions Envir
onment and looking, Vol. 1,
pp 544-553, CONSEC '95 .1995)

[0054]

(Equation 3)

In equation (3), β is the average temperature H _t (°
C) and a constant determined from the average humidity (%), a, b,
c and d are constants determined from the type of cement. Also,
n and m are constants determined from the location conditions of the concrete structure (the orientation and the situation facing the seamount).

The error function erf in the equation (1) is
Equation (4) is obtained.

[0057]

(Equation 4)

Next, the salt damage deterioration index due to the snow melting agent is expressed as a chloride ion concentration P _SD2 (kg / m ³ ). The formula for calculating the chloride ion concentration P _SD2 is the same as the formula (1) for calculating the chloride ion concentration P _SD1 based on the incoming salt, but the calculation of the surface chloride ion amount C ₀ (kg / m ³ ). The evaluation formula of the salt content A _b (mg / dm ² / year) in the formula is different. Elapsed time t (year), daily average snowfall H _Swi (cm),
With H _Swi snowfall days D _Swi (day), A _b is determined from equation (5). A _b = a · H _SW1 · D _SW1 · (t ₁ +1) + b · H _SW2 · D _SW2 · (t ₂ +1) +... (5) In equation (5), a, b. It is a constant representing the amount of the snow melting agent sprayed corresponding to the amount H _Swi . Further, a t _1, t ₂ ... scatter period constants a, b ... snow melting agent corresponding to (year). The deterioration potential (evaluation value rank) is a value obtained by normalizing the chloride ion concentration P _SD2 with a limit chloride ion concentration (for example, 1.2 kg / m ³ ) into five ranks.

Next, the deterioration index due to neutralization is expressed as a neutralization rate coefficient P _ND (mm / (year) ^1/2 ). The neutralization rate coefficient P _ND is calculated from equation (6). (Reference: Japan Society of Civil Engineers, Concrete Standard Specifications [Construction] 19
99; Japan Society of Civil Engineers, Standard Specifications for Concrete [Construction]
Durability control type-revised data, 1999) P _ND = β _e (−3.57 + 9.0 × W / (C + k + A _d )) (6) where W is the mass of water per unit volume (Kg), C coefficient determined by the type of cement mass per unit volume (Kg), k is admixtures, a _d is an admixture mass per unit volume (Kg), regional characteristics of characteristic data and concrete mix of the concrete structure Determined from data.

Β _e is an environmental coefficient calculated from humidity, air temperature, etc., elapse time t (year), average humidity H _m
(%) And the average temperature _Ht (° C), and is calculated from the equation (7). (References: Jung, Hirai, and Mihashi, experimental study on the effect of temperature and humidity on the mortar carbonation rate,
Journal of Concrete Engineering, Vol. 1, No. 1,19
90) β _e = a · H _m ² + b · H _m + c · H _t + d (7) In the equation (7), a, b, c, and d are constants.

Incidentally, the degradation potential (rank of the evaluation value)
Is a limit neutralization rate coefficient obtained by dividing a limit neutralization depth (cover-C _a (mm)) by a square root of elapsed time t (year), and a neutralization rate coefficient P _ND (mm / (Year) ^1/2 )
Is obtained by classifying the normalized values into five ranks. However, the value of C _a, depending on the salinity degradation potential, for example, a value of 10 to 25 mm.

Next, the deterioration index due to freeze-thaw is represented as the number of freeze-thaw cycles P _FD (times) within the elapsed time. The number of freezing and thawing times P _FD (times) is calculated by using the average annual number of days H _f that satisfies the daily maximum temperature of 0 ° C. or more and the daily minimum temperature of −5 ° C. or less, and the elapsed time t (year), using the equation (8) ). P _FD = H _f × t (8) The degradation potential (evaluation rank) is obtained by limiting the number of freeze-thaw cycles P _FD within the elapsed time to the limit value (for example, the average number of freeze-thaw days 75 days elapsed t). The value normalized by (multiplied value) is classified into five ranks.

Next, an index of deterioration due to initial cracks is expressed as a water evaporation amount P _CD (liter / m ² / hour). Moisture evaporation P _CD is temperature around the concrete structure, humidity, the use of concrete surface temperature is calculated by FIG. 13, for example. That is, in FIG.
When the temperature is 7 ° C (64F), the humidity is 40%, the concrete surface temperature is 16 ° C, and the wind speed is 32 km / hr, the graph is traced in the order of the dotted lines. First, trace upward from the outside air temperature of 17 ° C (64F), trace rightward from the intersection with the graph of humidity of 40%, trace downward from the intersection with the graph of concrete surface temperature of 16 ° C, and finally wind speed of 32 km / hr. Follow the intersection with the graph to the left. As a result, the value of the water evaporation amount P _CD is obtained as 0.12 lb / sqft / hr (0.6 liter / m ² / hour). (Reference: ACI
Commotte 308, Standard Pr
action for Curing Concrete
e (ACI 308-92), ANSI / ACI 30
8-92,1993) Note that the degradation potential (rank evaluation) is a limit value the water evaporation amount P _CD (e.g., 1.5
(Liter / m ² / hour)) are classified into five ranks.

As described above, according to the present embodiment, the deterioration state of the concrete structure can be quantitatively and easily determined using the map data such as the weather environment data, the regional characteristic data of the concrete mix, and the topographic data. Can be evaluated. Further, by changing the input parameters together with the deterioration evaluation of the concrete structure at the present time, it is possible to easily predict the future deterioration progress.

Further, since deterioration evaluation of a large number of concrete structures can be performed at the same time, relative comparison between structures can be easily performed, which can be utilized for prioritization of deterioration measures and the like.

The distribution of weather information in various parts of the country and the state of deterioration of concrete structures at arbitrary evaluation points can be displayed on a computer screen as map information, and can be printed and stored. Deterioration status of facilities and the like can be easily grasped.

Here, the configuration in which the computer 3 extracts necessary information from the connected database 9 has been described. However, the computer 3 is connected to a network such as the Internet, and the required database is used via the network. You can also.

[0068]

As described above in detail, according to the present invention, a plurality of deterioration factors of a concrete structure can be easily and efficiently evaluated by a computer using a geographic information system and a plurality of databases. can do.

[Brief description of the drawings]

FIG. 1 is a deterioration evaluation system 1 according to an embodiment of the present invention.
Diagram showing the configuration of

FIG. 2 is a diagram showing a processing procedure of a deterioration evaluation system.

FIG. 3 is a diagram showing a map data display setting screen;

Fig. 4 Example of screen display of weather environment database

FIG. 5 is a screen display example of an arbitrary point selection and deterioration evaluation result

FIG. 6 is a screen display example of a typical railway line and a main concrete structure on the line.

FIG. 7 is a screen display example of deterioration (neutralization) evaluation results of typical railway lines

FIG. 8: Screen display example of major concrete structures at national representative points

FIG. 9 is a screen display example of evaluation results (deterioration of salt damage 204 due to flying salt) at national representative points

FIG. 10 is a screen display example of evaluation results of deterioration (salt damage caused by snow melting agent 205) at national representative points

FIG. 11 is a screen display example of the evaluation result of deterioration (deterioration due to neutralization 206) at a national representative point

FIG. 12 is a screen display example of evaluation results of deterioration (deterioration by freeze-thaw 207) at representative points in the whole country.

FIG. 13 is a diagram for calculating the moisture evaporation amount P _CD is the initial crack index

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Deterioration evaluation system 3 ... Computer 5 ... Display 7 ... Printer 9 ... Database 33 ... Concrete related parameter input part 35 ... Evaluation target input part 37 ... Initial calculation Setting button 39 ・ ・ ・ Evaluation point setting part 41 ・ ・ ・ Calculation execution button 43 ・ ・ ・ Potential evaluation result display part 51 ・ ・ ・ Map data display setting screen 53 ・ ・ ・ Background figure setting part 55 ・ ・ ・ Representative point setting Unit 57 ... evaluation data setting unit 59 ... OK button 61 ... cancel button 63 ... evaluation route setting unit 65 ... screen display button 67 ... result distribution map display setting unit 68 ... Display item selection section 69 Result distribution diagram display buttons 71, 81, 87 Legend display sections 73, 75, 77, 79, 83, 85, 89, 9 1, 9
3 Map display part 76 Arbitrary point 78 Concrete structure

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Mizobuchi 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Inside Kashima Construction Co., Ltd. (72) Kumiko Suda 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (72) Inventor Junji Masukawa 1-2-7 Moto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Yasunori Hirayama 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (72) Inventor Yusuke Arima 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Junhiro Ueda 1-2-Chome Moto-Akasaka, Minato-ku, Tokyo No. 7 F-term in Kashima Construction Co., Ltd. (reference) 2G050 AA02 BA01 BA02 BA03 BA10 CA02 DA02 EA01 EA02 2G075 CA03 DA15 FB16 FC14 GA15 GA16 5B046 AA03 CA04 DA01 GA01 GA02 JA01 JA07 KA05

Claims (8)

[Claims] 1. A database for holding weather environment data, regional characteristic data of concrete mix and map data on topography, and selecting a point and inputting characteristic data relating to a concrete structure.
Means for calculating a concrete deterioration index on the basis of regional characteristic data of the concrete mix, topographical data, and the characteristic data relating to the concrete structure, and a deterioration evaluation system for the concrete structure. 2. The database according to claim 1, wherein the database holds the weather environment data, the regional characteristic data of the concrete mix, the topographic data, the main road data, the railway line data, or the representative point data of the whole country. The described deterioration evaluation system for concrete structures. 3. The concrete structure deterioration evaluation system according to claim 2, wherein the selection of the point selects any one of an arbitrary point, a route representative point, and a national representative point. 4. The concrete structure according to claim 1, wherein the characteristic data relating to the concrete structure includes a cover thickness, a cement type, a water-cement ratio, a unit cement amount, a direction, an elapsed age, and the like. Deterioration evaluation system. 5. The concrete structure according to claim 1, wherein the evaluation items are salt damage deterioration due to flying salt, salt damage deterioration due to a snow melting agent, deterioration due to neutralization, deterioration due to freezing and thawing, or crack deterioration. Object deterioration evaluation system. 6. The system for evaluating deterioration of a concrete structure according to claim 1, further comprising display means for displaying the deterioration index by ranking. 7. A recording medium storing a program for realizing the concrete structure deterioration evaluation system according to claim 1. 8. A database which stores weather environment data, regional characteristic data of concrete mix, and map data relating to topography. When a point is selected and characteristic data relating to a concrete structure is input, the weather environment data relating to the point is obtained.
Regional characteristics data, topographic data and
A deterioration evaluation method for a concrete structure, comprising calculating a deterioration index of the concrete based on the characteristic data relating to the concrete structure.