CN114139413A - Large transport bridge traffic safety batch checking device based on MIDAS - Google Patents
Large transport bridge traffic safety batch checking device based on MIDAS Download PDFInfo
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Abstract
The invention discloses a MIDAS-based large transport bridge traffic safety batch checking device which comprises a database, a project management unit, a vehicle management unit, a main control data unit, an operation calculation unit and a result checking unit, wherein the database stores a finite element calculation model meeting the standard and corresponding parameters of the model, the project management unit selects and adds an MIDAS CIVIL model needing checking calculation, the vehicle management unit records the axle distance, the axle load and the wheel distance of a vehicle, the main control data unit determines whether to consider the load impact coefficient of the large transport vehicle, whether to release the load of the large transport vehicle and whether to perform various checking calculation load combination coefficients, the operation calculation unit establishes a new calculation model by using data filled in the vehicle management unit and the main control data unit for checking calculation, and the result checking unit can check the calculation result. The invention realizes the batch automatic creation and checking calculation of the MIDAS checking calculation model through an informatization method, improves the intellectualization of the checking calculation process and reduces the manual participation.
Description
Technical Field
The invention relates to the technical field of intelligent traffic, in particular to a device for checking and calculating the traffic safety of a large transport bridge in batches based on MIDAS.
Background
With the continuous development of road traffic industry and national industrial facility construction, large-scale equipment such as generators, transformers, reactors, oil storage tanks and the like are frequently transported, the transport tonnage is increased year by year, and the transported equipment is mostly related to national civilization and most of the transported equipment has mandatory trafficability. The 'notice of the office hall of the department of transportation on further optimizing the work of the cross-provincial major transport parallel permission service' puts forward the requirement of perfecting a highway 'database' on the basis of the cross-provincial major transport parallel permission, and promotes the intelligent and rapid evaluation of the safety of major transport bridges. At present, due to the fact that no clear checking and calculating standard exists, each province carries out checking and calculating according to different methods, standardization degree is low, efficiency is low, and the ever-increasing large piece transportation passing requirements cannot be met.
The large transport bridge traffic safety batch checking method based on the MIDAS is used for realizing batch automatic creation and checking of the MIDAS checking model through an informatization method on the basis of a two-stage large transport bridge traffic safety assessment method aiming at the manual and mechanical repeated operation of the large transport bridge traffic safety checking, improves the intelligence of the checking process and reduces the manual participation.
Disclosure of Invention
In order to solve the limitation and defect existing in the prior art, the invention provides a large transport bridge passage safety batch checking and calculating device based on MIDAS, which comprises a database, a project management unit, a vehicle management unit, a main control data unit, an operation calculating unit and a result checking unit;
the database is used for storing MIDAS CIVIL finite element calculation model mcc files meeting preset standards and corresponding parameters of the MIDAS CIVIL finite element calculation model, the MIDAS CIVIL finite element calculation model is automatically modified into a required live load effect comparison calculation model according to preset rules, and the MIDAS CIVIL finite element calculation model is converted into a required load capacity limit state checking calculation model and a normal use limit state checking calculation model after being combined with the corresponding parameters;
the project management unit is used for creating a checking project, determining an MIDAS CIVIL finite element calculation model needing checking according to the passing route information and the road section information, adding the MIDAS CIVIL finite element calculation model into the checking project, and supporting saving and opening the checking project;
the vehicle management unit is used for inputting wheel base data, axle load data and wheel base data of a vehicle and converting the wheel base data, the axle load data and the wheel base data into vehicle load data;
the main control data unit is used for determining whether the load impact coefficient of the large piece of transport vehicle is considered to be used for modifying the mobile load analysis control data, determining whether the load of the large piece of transport vehicle is released to be used for modifying the mobile load working condition coefficient, and determining whether the load combination coefficient subjected to various checking calculations is used for generating a result load combination;
the operation calculation unit is used for replacing preset contents in MIDAS CIVIL finite element calculation model mct files with data formed by the vehicle management unit and the main control data unit to form MIDAS CIVIL finite element calculation model mct files used for project safety checking calculation, operating MIDAS CIVIL software, importing newly generated files for calculation to form MIDAS CIVIL DESIGNER models, checking calculation by using the MIDAS CIVIL DESIGNER models, and exporting calculation results in EXCEL format;
the result checking unit is used for checking the checking result, and the checking result comprises a live load effect comparison result, a bearing capacity limit state checking result, a normal use limit state checking result and a summary result.
Optionally, the MIDAS CIVIL finite element calculation model has corresponding parameters including model name, relative path, whether to design checking calculation, design internal force calculation mode, design safety level of road bridge and culvert structure, component manufacturing method, component checking calculation type, environment setting, torsion resistance reduction coefficient, consideration of prestressed bent steel bar, consideration of whether to consider that the RC component adopts welded steel bar framework, the RC component adopts welded steel bar framework coefficient, and whether to generate effective width, the effective width proportionality coefficient, whether the section eccentricity is considered, the design load bending moment coefficient, the design load shear coefficient, the design load axial force coefficient, the design load displacement coefficient, the large piece transportation load bending moment coefficient, the large piece transportation load shear coefficient, the large piece transportation load axial force coefficient, the large piece transportation load displacement coefficient, the tensile strength design value and the compressive strength design value.
Optionally, when the item management unit determines the MIDAS CIVIL finite element calculation model needing checking calculation according to the passing route information and the passing road section information, the preset database is accessed, the preset bridge is determined according to the route information and the road section information, and the MIDAS CIVIL finite element calculation model needing checking calculation is obtained after the finite element calculation model corresponding to the preset bridge is removed in weight.
Optionally, the vehicle management unit is configured to enter wheel base data, axle load data, and wheel base data of the vehicle, and convert the wheel base data, axle load data, and wheel base data into corresponding command stream statements according to requirements of an mct file format.
Optionally, the master control data unit is configured to determine whether to consider a load impact coefficient of a large transport vehicle, determine whether to release a load of the large transport vehicle, determine whether to perform various checking load combination coefficients, and convert the load combination coefficients into corresponding command stream statements according to requirements of an mct file format.
Optionally, the operation calculation unit is configured to perform calculation of the MIDAS CIVIL finite element calculation model, derive a calculation result and corresponding parameters, replace the relevant content of the MIDAS CIVIL finite element calculation model mcct file with the command stream statement, form a new model, perform live load effect comparison calculation, and derive the calculation result and the corresponding parameters.
Optionally, the operation calculation unit is configured to derive a calculation result and corresponding parameters of the MIDAS CIVIL finite element calculation model, perform checking calculation of a bearing capacity limit state and checking calculation of a normal use limit state on the formed MIDAS CIVIL DESIGNER model, and derive the calculation result and the corresponding parameters.
Optionally, the result checking unit is configured to read live load effect comparison results of the models, where the live load effect comparison results include at least one of ratios of a maximum positive bending moment, a maximum negative bending moment, a maximum shear force, a maximum axial force, a cable force of the cable, and a maximum vertical displacement.
Optionally, the result checking unit is configured to read a bearing capacity limit state checking result of each model, where the bearing capacity limit state checking result includes at least one of whether the positive section bending resistance bearing capacity checking can pass and a safety factor, and whether the oblique section shearing resistance bearing capacity checking can pass and a safety factor.
Optionally, the result checking unit is configured to read a normal use limit state checking result of each model, where the normal use limit state checking result includes at least one of a calculated value, an allowable value, and a passing possibility of the calculated value, a calculated value, and a passing possibility of the calculated value of the normal section bending resistance, the oblique section shearing resistance, the maximum compressive stress of the concrete in the compression zone, the main compressive stress of the concrete, the maximum tensile stress of the prestressed reinforcement in the tension zone.
The invention has the following beneficial effects:
the invention realizes the determination of the passing bridge according to the passing route and the road section and further determines the MIDAS CIVIL model needing checking calculation through the intercommunication with the database, thereby simplifying the complicated process of manually determining and searching the passing bridge according to the map. The key parameters are defined and then converted into the related content of the mct file to generate a new calculation model, and the mechanized repeated operation of manually modifying the checking calculation model is replaced. The invention forms the checking result table through the automatic derivation and the automatic reading of the calculation result and the related parameters, and replaces the mechanized repeated operation of manually reading the calculation result through a model. Meanwhile, a plurality of checking models are added simultaneously through project management, batch checking is achieved, a checking method of a standardized fixed flow is formed, accuracy and timeliness of checking results are improved, and bridge structure safety and transportation safety are indirectly guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a mass transit bridge transit safety batch checking device based on MIDAS according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method for batch checking and calculating transit safety of a large transportation bridge based on MIDAS according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the mass transit bridge transit safety batch checking device based on MIDAS provided by the present invention is described in detail below with reference to the accompanying drawings.
Example one
The embodiment provides a large transport bridge traffic safety batch checking and calculating device based on MIDAS, which comprises a database, a project management unit, a vehicle management unit, a main control data unit, an operation calculating unit and a result checking unit.
The database stores MIDAS CIVIL finite element calculation model mcc format files meeting the standard and corresponding parameters of the model, the model serving as a basic model can be automatically modified into a required live load effect comparison calculation model according to rules, and the model can be converted into a required bearing capacity limit state checking calculation model and a normal use limit state checking calculation model after being combined with the corresponding parameters.
The project management unit creates a checking calculation project, determines an MIDAS CIVIL model needing checking calculation according to the information of the passing route and the road section, adds the model into the checking calculation project, and supports saving and opening the project.
The vehicle management unit records the wheel base, the axle load and the wheel base of the vehicle and can convert the wheel base, the axle load and the wheel base into user-defined vehicle load data.
The main control data unit determines whether the load impact coefficient of the large piece of transport vehicle is considered to be used for modifying the analysis control data of the moving load, determines whether the load of the large piece of transport vehicle is released to be used for modifying the working condition coefficient of the moving load, and determines the load combination coefficients of various checking calculations to be used for generating a result load combination.
The operation calculation unit replaces relevant contents in the finite element calculation model mct format file with data formed by the vehicle management unit and the main control data unit to form a finite element calculation model mct format file used for project safety checking calculation, software is automatically opened MIDASCIVIL, a newly generated file is imported to perform calculation, then a MIDAS CIVIL DESIGNER model is automatically generated, checking calculation is completed, and a calculation result in an EXCEL format is exported.
The result checking unit can check checking results including live load effect comparison results, carrying capacity limit state checking, normal use limit state checking results and summary results.
In this embodiment, the finite element calculation model mcct format file in the database MIDAS CIVIL meets the following main requirements:
1) the main beam units needing checking calculation are divided according to the longitudinal beams and respectively defined as different structure groups, and 2) the structure groups are sequentially named as 'calculating unit 1' and 'calculating unit 2 … …';
3) the automobile load lane is arranged according to the middle load, and is named as 'middle load 1', middle load 2 'and middle load 3 … …' respectively;
4) the trailer load lane is arranged according to the intermediate load and is named as a trailer;
5) the large transport load lanes are arranged according to weight and are named as 'large transport vehicles';
6) the mobile load working conditions are defined as 2 automobile load working conditions and trailer load working conditions;
7) the vehicle is defined as a standard vehicle load or a lane load;
8) and finishing the span information setting.
In this embodiment, the corresponding parameters of the database model include: the method comprises the steps of model name, relative path, whether design check calculation is carried out or not, design internal force calculation mode, design safety level of a highway bridge and culvert structure, component manufacturing method, component check calculation type, environment setting, torsion resistance reduction coefficient beta t, prestress bending reinforcing steel bar consideration _ h, whether a welding reinforcing steel bar framework is adopted by an RC component or not, whether a welding reinforcing steel bar framework coefficient is adopted by the RC component or not, whether effective width is generated or not, whether section eccentricity is considered or not, design load bending moment coefficient, design load shearing coefficient, design load axial force coefficient, design load displacement coefficient, large piece transport load bending moment coefficient, large piece transport load shearing coefficient, large piece transport load axial force coefficient, large piece transport load displacement coefficient, tensile strength design value and compressive strength design value.
In this embodiment, when the item management unit determines the MIDAS CIVIL model to be checked according to the information of the passing route and road section, the item management unit may access the database of the "bridge and tunnel intelligent control platform", determine the relevant bridge according to the route and road section, and determine that the finite element calculation model corresponding to the relevant bridge is the MIDAS CIVIL model to be checked after the finite element calculation model is removed.
In this embodiment, the vehicle management unit records the wheel base, the axle load, and the wheel base of the vehicle, and automatically converts the wheel base, the axle load, and the wheel base into corresponding command stream statements according to the requirements of the mct file format.
In this embodiment, the main control data unit determines whether to consider the load impact coefficient of the large transport vehicle, whether to release the load of the large transport vehicle, and various checking load combination coefficients, and automatically converts the load combination coefficients into corresponding command stream statements according to the requirements of the mct file format.
In this embodiment, the operation calculation unit automatically performs calculation of the basic MIDAS CIVIL model, derives a calculation result and related parameters, and then replaces the related contents (MOVE-Ctrl (CH), VEHICLE, MVLDCASE (CH), and LOADCOMB) of the mct file of the basic MIDAS CIVIL model with the command stream statements to form a new model for live load effect comparison calculation, and derives a calculation result and related parameters.
In this embodiment, the calculation result and the related parameters derived by comparing the live load effect include:
A. and (3) pretreatment results: the sectional area A and the strength of the truss unit;
B. comparing data results of the design model and the large part-load effect;
a) designing a bending moment Md of the target beam unit under the action of load;
b) designing a shearing force Qd of the target beam unit under the action of load;
c) designing an axial force Nd of the target beam unit under the action of a load;
d) designing the deflection delta of the target beam unit under the action of load;
e) designing a seven-degree-of-freedom effect of the target unit under the action of load;
f) designing the internal force Sd of a target truss and cable unit under the action of load;
g) bending moment M of the target beam unit under the action of large load;
h) shearing force Q of the target beam unit under the action of large load;
i) the axial force N of the target beam unit under the action of the large load;
j) the deflection delta of the target beam unit under the action of large load;
k) the seven-degree-of-freedom effect of the target unit under the action of the large piece load;
l) internal force S of the target truss and cable unit under the action of large load.
When the bridge is designed according to general Specification for Highway bridge and culvert design (JTJ 021-89), the internal force of the target unit under the action of the designed load is divided into two moving loads, namely an automobile load and a trailer load, and the two moving loads are combined and output.
In this embodiment, after the MIDAS CIVIL model calculation result and the related parameters are derived, a MIDAS CIVIL DESIGNER model is automatically generated to perform checking calculation of the bearing capacity limit state and checking calculation of the normal use limit state, and the calculation result and the related parameters are derived.
In this embodiment, the calculation results derived from the checking calculation of the load-bearing capacity limit state and the checking calculation of the normal use limit state include:
C. checking and calculating the limit state of the bearing capacity;
a) combining the target load with a finite element model to obtain a bending resistance checking calculation result;
b) combining the target load with a finite element model shear proof checking calculation result;
D. normal use limit state;
a) combining the calculation results of the tensile stress (deduction prestress) of the right section of the finite element model of the target load;
b) calculating the result of the prestress of the right section of the target load combined finite element model;
c) the target load combination finite element model right section crack resistance checking calculation result and the safety coefficient;
d) the oblique section crack resistance checking calculation result and the safety factor of the target load combination finite element model;
e) checking the result and the safety factor of the compressive stress of the positive section of the target load combined finite element model;
f) checking and calculating results and safety factors of the main compressive stress of the oblique section of the target load combined finite element model;
g) checking a result and a safety factor of the target load combined finite element model for the crack width;
h) and (4) combining the tensile stress checking calculation result and the safety factor of the tensile steel bar of the finite element model with the target load.
In this embodiment, the result checking unit may read the data in the calculation result file to automatically calculate live load effect comparison results of the models, that is, ratios (large transportation load effect/design load effect) of the maximum positive bending moment, the maximum negative bending moment, the maximum shear force, the maximum axial force, the cable force of the cable, and the maximum vertical displacement.
In this embodiment, the result checking unit may read data in the calculation result file to automatically calculate the checking result of the extreme state of the bearing capacity of each model, that is, whether the bending resistance bearing capacity of the right section can pass or not and the safety factor, and whether the shearing resistance bearing capacity of the oblique section can pass or not and the safety factor.
In this embodiment, the result checking unit may read data in the calculation result file to automatically calculate the checking result of the normal use limit state of each model, that is, the calculated values, the allowable values and the passing/failing values of the bending resistance of the front section in the use stage, the shearing resistance of the oblique section in the use stage, the maximum compressive stress of the concrete in the compression zone, the main compressive stress of the concrete, and the maximum tensile stress of the prestressed reinforcement in the tension zone.
In order to make the technical problems, technical solutions and advantageous effects required to be solved by the present embodiment more clearly apparent, the present embodiment is further described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a mass transit bridge transit safety batch checking device based on MIDAS according to an embodiment of the present invention. As shown in fig. 1, the present embodiment provides a mass transit bridge passage safety batch checking device based on MIDAS, which includes a database, a project management unit, a vehicle management unit, a main control data unit, an operation calculation unit, and a result checking unit.
The database stores MIDAS CIVIL finite element calculation model mcc format files meeting the standard and corresponding parameters of the model, the model serving as a basic model can be automatically modified into a required live load effect comparison calculation model according to rules, and the model can be converted into a required bearing capacity limit state checking calculation model and a normal use limit state checking calculation model after being combined with the corresponding parameters.
The project management unit creates a checking calculation project, determines an MIDAS CIVIL model needing checking calculation according to the information of the passing route and the road section, adds the model into the checking calculation project, and supports saving and opening the project.
The vehicle management unit records the wheel base, the axle load and the wheel base of the vehicle and can convert the wheel base, the axle load and the wheel base into user-defined vehicle load data.
The main control data unit determines whether the load impact coefficient of the large piece of transport vehicle is considered to be used for modifying the analysis control data of the moving load, determines whether the load of the large piece of transport vehicle is released to be used for modifying the working condition coefficient of the moving load, and determines the load combination coefficients of various checking calculations to be used for generating a result load combination.
The operation calculation unit replaces relevant contents in the finite element calculation model mct format file with data formed by the vehicle management unit and the main control data unit to form a finite element calculation model mct format file used for project safety checking calculation, software is automatically opened MIDAS CIVIL, a newly generated file is imported to perform calculation, then a MIDAS CIVIL DESIGNER model is automatically generated, checking calculation is completed, and a calculation result in an EXCEL format is exported.
The result checking unit can check checking results including live load effect comparison results, carrying capacity limit state checking, normal use limit state checking results and summary results.
In this embodiment, the finite element calculation model mcct format file in the database MIDAS CIVIL meets the following main requirements:
1) the main beam units needing checking calculation are divided according to the longitudinal beams and respectively defined as different structure groups, and 2) the structure groups are sequentially named as 'calculating unit 1' and 'calculating unit 2 … …';
3) the automobile load lane is arranged according to the middle load, and is named as 'middle load 1', middle load 2 'and middle load 3 … …' respectively;
4) the trailer load lane is arranged according to the intermediate load and is named as a trailer;
5) the large transport load lanes are arranged according to weight and are named as 'large transport vehicles';
6) the mobile load working conditions are defined as 2 automobile load working conditions and trailer load working conditions;
7) the vehicle is defined as a standard vehicle load or a lane load;
8) and finishing the span information setting.
In this embodiment, the corresponding parameters of the database model include: the method comprises the steps of model name, relative path, whether design check calculation is carried out or not, design internal force calculation mode, design safety level of a highway bridge and culvert structure, component manufacturing method, component check calculation type, environment setting, torsion resistance reduction coefficient beta t, prestress bending reinforcing steel bar consideration _ h, whether a welding reinforcing steel bar framework is adopted by an RC component or not, whether a welding reinforcing steel bar framework coefficient is adopted by the RC component or not, whether effective width is generated or not, whether section eccentricity is considered or not, design load bending moment coefficient, design load shearing coefficient, design load axial force coefficient, design load displacement coefficient, large piece transport load bending moment coefficient, large piece transport load shearing coefficient, large piece transport load axial force coefficient, large piece transport load displacement coefficient, tensile strength design value and compressive strength design value.
In this embodiment, when the item management unit determines the MIDAS CIVIL model to be checked according to the information of the passing route and road section, the item management unit may access the database of the "bridge and tunnel intelligent control platform", determine the relevant bridge according to the route and road section, and determine that the finite element calculation model corresponding to the relevant bridge is the MIDAS CIVIL model to be checked after the finite element calculation model is removed.
In this embodiment, the vehicle management unit records the wheel base, the axle load, and the wheel base of the vehicle, and automatically converts the wheel base, the axle load, and the wheel base into corresponding command stream statements according to the requirements of the mct file format.
In this embodiment, the main control data unit determines whether to consider the load impact coefficient of the large transport vehicle, whether to release the load of the large transport vehicle, and various checking load combination coefficients, and automatically converts the load combination coefficients into corresponding command stream statements according to the requirements of the mct file format.
In this embodiment, the operation calculation unit automatically performs calculation of the basic MIDAS CIVIL model, derives a calculation result and related parameters, and then replaces the related contents (MOVE-Ctrl (CH), VEHICLE, MVLDCASE (CH), and LOADCOMB) of the mct file of the basic MIDAS CIVIL model with the command stream statements to form a new model for live load effect comparison calculation, and derives a calculation result and related parameters.
In this embodiment, the calculation result and the related parameters derived by comparing the live load effect include:
A. and (3) pretreatment results: the sectional area A and the strength of the truss unit;
B. comparing data results of the design model and the large part-load effect;
a) designing a bending moment Md of the target beam unit under the action of load;
b) designing a shearing force Qd of the target beam unit under the action of load;
c) designing an axial force Nd of the target beam unit under the action of a load;
d) designing the deflection delta of the target beam unit under the action of load;
e) designing a seven-degree-of-freedom effect of the target unit under the action of load;
f) designing the internal force Sd of a target truss and cable unit under the action of load;
g) bending moment M of the target beam unit under the action of large load;
h) shearing force Q of the target beam unit under the action of large load;
i) the axial force N of the target beam unit under the action of the large load;
j) the deflection delta of the target beam unit under the action of large load;
k) the seven-degree-of-freedom effect of the target unit under the action of the large piece load;
l) internal force S of the target truss and cable unit under the action of large load.
When the bridge is designed according to general Specification for Highway bridge and culvert design (JTJ 021-89), the internal force of the target unit under the action of the designed load is divided into two moving loads, namely an automobile load and a trailer load, and the two moving loads are combined and output.
In this embodiment, after the MIDAS CIVIL model calculation result and the related parameters are derived, a MIDAS CIVIL DESIGNER model is automatically generated to perform checking calculation of the bearing capacity limit state and checking calculation of the normal use limit state, and the calculation result and the related parameters are derived.
In this embodiment, the calculation results derived from the checking calculation of the load-bearing capacity limit state and the checking calculation of the normal use limit state include:
C. checking and calculating the limit state of the bearing capacity;
a) combining the target load with a finite element model to obtain a bending resistance checking calculation result;
b) combining the target load with a finite element model shear proof checking calculation result;
D. normal use limit state;
a) combining the calculation results of the tensile stress (deduction prestress) of the right section of the finite element model of the target load;
b) calculating the result of the prestress of the right section of the target load combined finite element model;
c) the target load combination finite element model right section crack resistance checking calculation result and the safety coefficient;
d) the oblique section crack resistance checking calculation result and the safety factor of the target load combination finite element model;
e) checking the result and the safety factor of the compressive stress of the positive section of the target load combined finite element model;
f) checking and calculating results and safety factors of the main compressive stress of the oblique section of the target load combined finite element model;
g) checking a result and a safety factor of the target load combined finite element model for the crack width;
h) and (4) combining the tensile stress checking calculation result and the safety factor of the tensile steel bar of the finite element model with the target load.
In this embodiment, the result checking unit can read the data in the calculation result file of claim 8 to automatically calculate the live load effect comparison result of each model, that is, the ratio of the maximum positive bending moment, the maximum negative bending moment, the maximum shear force, the maximum axial force, the cable force of the cable, and the maximum vertical displacement (large transportation load effect/design load effect).
In this embodiment, the result checking unit can read the data in the calculation result file of claim 10 to automatically calculate the checking result of the extreme state of the bearing capacity of each model, that is, whether the positive section bending resistance bearing capacity can pass or not and the safety factor, and whether the oblique section shearing resistance bearing capacity can pass or not and the safety factor.
In this embodiment, the result checking unit can read the data in the calculation result file of claim 10 to automatically calculate the checking result of the normal use limit state of each model, i.e. the calculated values, the allowable values and the passing/failing values of the normal use limit state of the used stage normal section bending resistance, the used stage oblique section shearing resistance, the concrete maximum compressive stress of the compression zone, the concrete main compressive stress, the prestressed reinforcement maximum tensile stress of the tension zone.
Fig. 2 is a flowchart of a method for batch checking and calculating transit safety of a large transportation bridge based on MIDAS according to an embodiment of the present invention. As shown in fig. 2, the method for batch checking and calculating the transit safety of the major transit bridge based on the MIDAS provided by the embodiment includes:
step S1: creating a finite element calculation model mcc file meeting the standard as a basic model according to the main requirements of the model;
step S2: associating the basic model created by the S1 with a specific bridge in a database of the bridge and tunnel intelligent management and control platform;
step S3: selecting a passing route and a passing road section in project management, and automatically and sequentially determining a passing bridge, an associated basic model and an object of checking calculation in a bridge and tunnel intelligent control platform database by the system;
step S4: the axle load, the wheel base and the wheel base of the large transport vehicle are recorded in vehicle management according to the axle load distribution (derived from a vehicle profile) of the large transport vehicle;
step S5: selecting whether the load impact coefficient of the large transport vehicle is considered or not in the master control data, filling the load amplification coefficient (more than or equal to 1.0) of the large transport vehicle, filling various checking load combination coefficients, selecting a corresponding basic model parameter setting file, and selecting a storage position of a calculation result;
step S6: starting the calculation in the running calculation:
step S6-1: calculating MIDAS CIVIL a basic model, and deriving a corresponding calculation result;
step S6-2: automatically replacing relevant contents (MOVE-CTRL (CH), VEHICLE, MVLDCASE (CH) and LOADCOMB) of the mct file of the basic MIDAS CIVIL model to form a checking model, calculating, exporting corresponding calculation results and forming live load effect comparison analysis results;
step S6-3: converting into MIDAS CIVIL DESIGNER checking calculation model, calculating, deriving corresponding calculation result, and forming checking calculation of bearing capacity limit state and checking calculation analysis result of normal use limit state;
step S7: and sequentially checking live load effect comparison analysis results, bearing capacity limit state checking and calculation results, normal use limit state checking and calculation analysis results and summary results in the checking results.
The embodiment provides a large transport bridge traffic safety batch checking device based on MIDAS, which comprises a database, a project management unit, a vehicle management unit, a master control data unit, an operation calculation unit and a result checking unit, wherein the database stores a finite element calculation model meeting the standard and corresponding parameter settings of the model, the project management unit selects and adds MIDAS CIVIL models needing checking, the vehicle management unit records the axle distance, the axle load and the wheel distance of a vehicle, the master control data unit determines whether to consider the load impact coefficient of the large transport vehicle, whether to release the load of the large transport vehicle and whether to perform various load combination coefficients of checking, the operation calculation unit establishes a new calculation model by using data filled in the vehicle management unit and the master control data unit to check, and the result checking unit can check the calculation result. The method aims at the manual and mechanical repeated operation of the large transport bridge traffic safety check calculation, and realizes the automatic batch creation and check calculation of the MIDAS check calculation model through an informatization method on the basis of the two-stage large transport bridge traffic safety evaluation method, so that the intelligence of the check calculation process is improved, and the manual participation is reduced.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A large transport bridge traffic safety batch checking and calculating device based on MIDAS is characterized by comprising a database, a project management unit, a vehicle management unit, a main control data unit, an operation calculating unit and a result checking unit;
the database is used for storing MIDAS CIVIL finite element calculation model mcc files meeting preset standards and corresponding parameters of the MIDAS CIVIL finite element calculation model, the MIDAS CIVIL finite element calculation model is automatically modified into a required live load effect comparison calculation model according to preset rules, and the MIDAS CIVIL finite element calculation model is converted into a required load capacity limit state checking calculation model and a normal use limit state checking calculation model after being combined with the corresponding parameters;
the project management unit is used for creating a checking project, determining an MIDAS CIVIL finite element calculation model needing checking according to the passing route information and the road section information, adding the MIDAS CIVIL finite element calculation model into the checking project, and supporting saving and opening the checking project;
the vehicle management unit is used for inputting wheel base data, axle load data and wheel base data of a vehicle and converting the wheel base data, the axle load data and the wheel base data into vehicle load data;
the main control data unit is used for determining whether the load impact coefficient of the large piece of transport vehicle is considered to be used for modifying the mobile load analysis control data, determining whether the load of the large piece of transport vehicle is released to be used for modifying the mobile load working condition coefficient, and determining whether the load combination coefficient subjected to various checking calculations is used for generating a result load combination;
the operation calculation unit is used for replacing preset contents in MIDAS CIVIL finite element calculation model mct files with data formed by the vehicle management unit and the main control data unit to form MIDAS CIVIL finite element calculation model mct files used for project safety checking calculation, operating MIDAS CIVIL software, importing newly generated files for calculation to form MIDAS CIVIL DESIGNER models, checking calculation by using the MIDAS CIVIL DESIGNER models, and exporting calculation results in EXCEL format;
the result checking unit is used for checking the checking result, and the checking result comprises a live load effect comparison result, a bearing capacity limit state checking result, a normal use limit state checking result and a summary result.
2. The MIDAS-based large transportation bridge passage safety batch checking and calculating device as claimed in claim 1, wherein the corresponding parameters of the MIDAS CIVIL finite element calculation model comprise model name, relative path, whether design checking and calculation is performed or not, design internal force calculation mode, design safety level of highway bridge and culvert structure, component manufacturing method, component checking and calculation type, environment setting, torsion resistance reduction coefficient, consideration of prestress bending reinforcing steel bar, consideration of whether welding reinforcing steel bar framework is adopted by RC component, consideration of welding reinforcing steel bar framework coefficient by RC component, generation of effective width, effective width proportionality coefficient, consideration of section eccentricity, design load bending moment coefficient, design load shear coefficient, design load axial force coefficient, design load displacement coefficient, large transportation load bending moment coefficient, large transportation load shear coefficient, large transportation load axial force coefficient, mass load stress coefficient, mass stress coefficient, and the like, At least one of the large transportation load displacement coefficient, the design value of tensile strength and the design value of compressive strength.
3. The MIDAS-based large transportation bridge traffic safety batch checking and calculating device as claimed in claim 1, wherein when the item management unit determines MIDAS CIVIL finite element calculation models needing checking and calculating according to traffic route information and road section information, the item management unit accesses a preset database, determines preset bridges according to the route information and the road section information, and obtains MIDAS CIVIL finite element calculation models needing checking and calculating after the finite element calculation models corresponding to the preset bridges are de-duplicated.
4. The MIDAS-based large transportation bridge passage safety batch checking device as claimed in claim 1, wherein the vehicle management unit is used for inputting wheel base data, axle load data and wheel base data of the vehicle, and converting the wheel base data, the axle load data and the wheel base data into corresponding command stream statements according to requirements of an mct file format.
5. The MIDAS-based large transportation bridge passage safety batch checking device as claimed in claim 1, wherein the main control data unit is used for determining whether to consider the load impact coefficient of a large transportation vehicle, determining whether to release the load of the large transportation vehicle, determining whether to perform various checking load combination coefficients, and converting the load combination coefficients into corresponding command stream statements according to the requirements of the mct file format.
6. The MIDAS-based large transportation bridge passage safety batch checking device as claimed in claim 1, wherein the operation computing unit is configured to perform computation of the MIDAS CIVIL finite element computation model, derive computation results and corresponding parameters, replace relevant contents of the MIDAS CIVIL finite element computation model mct file with the command stream statements, form a new model for live load effect comparison computation, and derive computation results and corresponding parameters.
7. The MIDAS-based large transportation bridge traffic safety batch checking and calculating device as claimed in claim 1, wherein the operation calculating unit is used for deriving the calculation result and the corresponding parameters of the MIDAS CIVIL finite element calculation model, carrying out the load-bearing capacity limit state checking and the normal use limit state checking on the formed MIDAS CIVIL DESIGNER model, and deriving the calculation result and the corresponding parameters.
8. The MIDAS-based large transportation bridge traffic safety batch checking and calculating device as claimed in claim 1, wherein the result checking unit is used for reading live load effect comparison results of each model, and the live load effect comparison results comprise at least one of ratios of maximum positive bending moment, maximum negative bending moment, maximum shearing force, maximum axial force, guy cable force and maximum vertical displacement.
9. The MIDAS-based large transportation bridge traffic safety batch checking device as claimed in claim 1, wherein the result checking unit is used for reading the checking result of the bearing capacity limit state of each model, and the checking result of the bearing capacity limit state comprises at least one of whether the positive section bending resistance bearing capacity can be checked and the safety factor, whether the oblique section shearing resistance bearing capacity can be checked and the safety factor.
10. The MIDAS-based large transportation bridge passage safety batch checking device as claimed in claim 1, wherein the result checking unit is used for reading the checking result of the normal use limit state of each model, and the checking result of the normal use limit state comprises at least one of the calculation values of normal section bending resistance in the use stage, oblique section shearing resistance in the use stage, the maximum compressive stress of concrete in a compression zone, the main compressive stress of concrete, the maximum tensile stress of prestressed reinforcements in a tension zone, an allowable value and the passing possibility.
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