CN105160091A - Earthquake resistant design system based on structural integrity - Google Patents
Earthquake resistant design system based on structural integrity Download PDFInfo
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- CN105160091A CN105160091A CN201510536120.8A CN201510536120A CN105160091A CN 105160091 A CN105160091 A CN 105160091A CN 201510536120 A CN201510536120 A CN 201510536120A CN 105160091 A CN105160091 A CN 105160091A
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Abstract
The present invention discloses an earthquake resistant design system based on structural integrity. The system mainly comprises a structural component setting unit, a model generation unit and an earthquake movable simulation unit. The structural component setting unit comprises a surface ground foundation setting module, an upper structural component setting module and a lower structural component setting module. The surface ground foundation setting module, the upper structural component setting module and the lower structural component setting module set condition of surface ground foundation, a upper structural component parameter and a lower structural component parameter separately according to non-linear characteristic or structure elastic-plasticity. The model generation unit sets conditions and parameters of an unit according to the structural component based on a structural component model stored in a structural component database and performs numerical modeling on integrity of an upper structure and a lower structure to generate an engineering structure model with an integral structure; The earthquake movable simulation unit sets earthquake intensity, and generates an analog earthquake wave which enters in the lower structural component through the surface ground foundation and then is transmitted to the upper structural component.
Description
Technical field
The present invention relates to seismic design field, particularly relate to the seismic design system of structure based integration.
Background technology
While China's Wenchuan earthquake betiding 2008 brings about great losses to national economy and people's lives and properties, also highlight the many short slab of China under rarely occurred earthquake condition in civil engineering structure thing seismic design.Wherein distinct issues are current antidetonation seismic design software systems or based on quasi-static model (evolution of works seismic response analysis can be roughly divided into: static method, response spectrum method, direct dynamic analysis method) the most, based on elastic calculation, verify by the strength of materials, and superstructure and basis are separated design.There are problems in the works adopting the method to design, cannot resist the attack of special violent earthquake, mainly come from following reason.
1) size of inertial force that earthquake motion can only cause by quasi-static model replaces with dead load simply, but can not consider the impact that dynamic load frequency component produces.Particularly when running into special violent earthquake, strong dynamic load causes significantly reducing of works rigidity and causes the growth of natural period, thus greatly has influence on the dynamic response of works, and the characteristic of this complexity cannot be taken in by quasi-static model.
2) works is under violent earthquake effect, and major part will enter the elastic-plastic deformation stage, and compared with elastic deformation, excessive plastic yield can make structure crack, and concrete comes off, and even destroys; But then, because the rigidity of structure of plastic stage reduces, the structure natural period increases, and changes the seismic response characteristic of structure, and stiff irrecoverable distortion can dissipate the seismic energy of input, Cong Er Minus small earthquake to structural damage; Under nonlinear state, whether structure destroys the ability by depending on plastic deformation ability or dissipation energy, and does not depend on intensity, and strength condition can not the shock resistance of evaluation structure rightly.
3) during earthquake, superstructure and basis integrally produce response.Seismic event enters basis by top layer foundation soil, thus be uploaded to superstructure and cause vibration and produce inertia dynamic load.And this process reverses by Quintic system Design Rule, first suppose the size of the horizontal direction earthquake load of superstructure as rainfall, seismic force transmits from top to bottom, and design of being come in basis and superstructure fractionation.Such design treatment, can not reflect resonance effects during earthquake objectively, particularly cut veneer of soil field, basis and superstructure between dynamic movement, greatly have impact on the rationality of design, reduce design accuracy.
In recent years along with the fast development of China's economic construction, there is various forms of bridge (the city intersection engineering as large span, Super Long Span Cable-stayed Bridges, suspension bridge, arch bridge and various complexity).Also great number of issues has been emerged in large numbers in Bridge Earthquake Resistance Design.From former years repeatedly gravely the he result of investigation of earthquake centre to bridge earthquake show, the destruction of present bridge occurs along along bridge to direction across bridge mostly, and especially serious to earthquake along bridge.Usually can observe that the form of bridge eaerthquake damage has following several typical case: bottom bridge pier, plastic hinge destroys, bearing large deformation shear failure, the beam that falls destroys, and foundation failure etc.Therefore, the seismic design of bridge more and more comes into one's own.But compared to many earthquake countries such as Japan, China is also immature to the application of the seismic design of bridge.Therefore, the application of further investigation seismic design in the middle of bridge and Problems existing thereof are also research directions highly significant.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the seismic design system of structure based integration is provided
,abandoned current Flexible Design method and adopted non-linear or Elastoplastic Method, design objective reflects the damage that special violent earthquake causes works intuitively by quantifying, and adopts different quantizating index to carry out accurate automatic Verification according to degree of injury.
The object of the invention is to be achieved through the following technical solutions: the seismic design system of structure based integration, it comprises one or more unit modules following.
1. component setup unit: comprise surface soil Slag setting module, upper component setting module and lower member setting module, surface soil Slag setting module, upper component setting module and lower member setting module set surperficial soil site base condition, upper component and lower member parameter according to nonlinear characteristic or structural elasto-plastic response respectively.
2. model generation unit: the component model stored in Component-Based Development database, the condition set by component setup unit and parameter, carry out numerical model process as a whole by superstructure and substructure, the engineering model of generating structure integration.
Described model generation unit adopts equivalent energy method to increase the stability of engineering model.
3. earthquake synthesis unit: Enactive earthquake force intensity, produces seismic wave in analog, will enter lower member by seismic wave in analog, then be uploaded to upper component from lower member by veneer of soil Slag, makes superstructure cause vibrations to produce inertia dynamic load.
4. resist and push over resolution unit, described resisting pushes over resolution unit for the nonlinear characteristic according to component and ground, pushes over section power and the distortion that analytical Calculation goes out each component, generate load-deflection curve, and determine the natural period of equal value of each component by anti-.
5. lesion quantification unit, described lesion quantification unit is used for the design maximum displacement conversing component according to energy conservation principle, and index reflects the faulted condition that simulated earthquake causes engineering structure by quantifying.
6. antidetonation checks unit, and described antidetonation is checked unit and is used for deformation state corresponding in simulated earthquake with it for the design maximum displacement of component to check; Different quantizating index is adopted to carry out automatic Verification according to faulted condition, the roadholding of quantitative evaluation upper component damage performance and lower member;
7. displacement control unit, described displacement control unit is used in simulated earthquake, controls the displacement of upper component, avoids the actual displacement of upper component under the effect of seismic force comparatively large and produces destruction.
8. shear failure checking computations unit, by concrete component shear failure algorithm, the shear resistance of checking computations needed for component.
9. human-computer interaction interface, described human-computer interaction interface has been used for parameter setting operation, and when representing simulated earthquake, veneer of soil Slag, dynamic movement between substructure and superstructure, complete the operation of antidetonation forecast assessment.
10. monitoring management database, for storing the data that each unit module produces, so that the data call of final-period management analysis and external interface.
The invention has the beneficial effects as follows:
The present invention has abandoned current Flexible Design method and has adopted non-linear or Elastoplastic Method, design objective reflects the damage that special violent earthquake causes works intuitively by quantifying, and adopt different quantizating index to carry out accurate automatic Verification according to degree of injury, realize accurate laborsaving design, finally reach the object that scientific payoffs is converted to yield-power.Present system has captured a following difficult problem.
1) considering that the structure-integrated of structural nonlinear characteristic calculates because being subject to the impact that stiffness variation is large, not easily restraining and easily dispersing.For avoiding occurring this phenomenon, improve computational accuracy by model generation unit reasonable set engineering model, reduce convergence error.Meanwhile, for the calculating instability problem that rigidity too softening (slope planarization) causes, equivalent energy method is adopted to increase the stability of engineering model calculating.
2) adopt the cumulative load mode of displacement anti-pushing in parsing, analytical Calculation goes out section power and the distortion of each component, generates load-deflection curve, and determines the natural period of equal value of each component.
3) be used in simulated earthquake by displacement control unit, control the displacement of upper component, avoid the actual displacement of upper component under the effect of seismic force comparatively large and produce and destroy, as bridge pier column flexing, Luo Liang, component such as to collide mutually at the destruction.
4) for avoiding because the serious cracking and spalling of ambassador's concrete is crossed in flexural deformation, cause concrete damaging by pressure, the strength test results of concrete component should be considered, improve the check precision of component damage performance, to guarantee that bending resistance component has enough ductile performance.
5) according to the lesson of earthquake disaster in the past, the shear failure of concrete component is the most fatefulue, is the shear resistance needed for prediction pier stud, avoids stirrup deficiency under axle power and Moment and the shear failure that causes.Check unit by shear failure, adopt concrete component shear failure algorithm, the shear resistance of checking computations needed for component.
Accompanying drawing explanation
Fig. 1 is the system chart of seismic design system of the present invention;
Fig. 2 is the workflow schematic diagram of present system.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, the seismic design system of structure based integration, it comprises one or more unit modules following.
1. component setup unit: comprise surface soil Slag setting module, upper component setting module and lower member setting module, surface soil Slag setting module, upper component setting module and lower member setting module set surperficial soil site base condition, upper component and lower member parameter according to nonlinear characteristic or structural elasto-plastic response respectively.
2. model generation unit: the component model stored in Component-Based Development database, the condition set by component setup unit and parameter, carry out numerical model process as a whole by superstructure and substructure, the engineering model of generating structure integration.
Described model generation unit adopts equivalent energy method to increase the stability of engineering model.
3. earthquake synthesis unit: Enactive earthquake force intensity, produces seismic wave in analog, will enter lower member by seismic wave in analog, then be uploaded to upper component from lower member by veneer of soil Slag, makes superstructure cause vibrations to produce inertia dynamic load.
4. resist and push over resolution unit, described resisting pushes over resolution unit for the nonlinear characteristic according to component and ground, pushes over section power and the distortion that analytical Calculation goes out each component, generate load-deflection curve, and determine the natural period of equal value of each component by anti-.
Special violent earthquake must cause the sharply decline of stiffness of structural member so that its constitutive relation to enter " negative slope " region, softization (shearing rigidity decline) or the significantly anxious of foundation bearing capacity caused of liquefying of adding foundation soil subtract, structural integrity will be caused to surrender, and load-deflection curve is occurred, and bearing capacity decline conjugates " negative slope " phenomenon of increasing.The extraordinary constitutive relation that this load reduces but to be increased along with displacement causes because Giant Bullous load causes structure severe injury.
Therefore, adopt the cumulative load mode of displacement anti-pushing in parsing, analytical Calculation goes out section power and the distortion of each component, generates load-deflection curve, and determines the natural period of equal value of each component.
5. lesion quantification unit, described lesion quantification unit is used for the design maximum displacement conversing component according to energy conservation principle, and index reflects the faulted condition that simulated earthquake causes engineering structure by quantifying.
This seismic design software systems also obtain the kinematic behavior of structure indirectly by energy conservation principle, because this method is the approximate data got based on nonlinear dynamic analysis, can reflect dynamic effect objectively to a certain extent.
6. antidetonation checks unit, and described antidetonation is checked unit and is used for deformation state corresponding in simulated earthquake with it for the design maximum displacement of component to check; Different quantizating index is adopted to carry out automatic Verification according to faulted condition, the roadholding of quantitative evaluation upper component damage performance and lower member;
7. displacement control unit, described displacement control unit is used in simulated earthquake, controls the displacement of upper component, avoids the actual displacement of upper component under the effect of seismic force comparatively large and produces destruction.
8. shear failure checking computations unit, by concrete component shear failure algorithm, the shear resistance of checking computations needed for component.
9. human-computer interaction interface, described human-computer interaction interface has been used for parameter setting operation, and when representing simulated earthquake, veneer of soil Slag, dynamic movement between substructure and superstructure, complete the operation of antidetonation forecast assessment.
The work efficiency of operator can be improved by human-computer interaction interface, there is the advantages such as easy and simple to handle, systematicness is strong, objective interface, operating personnel only need professional knowledge and the computer operation ability on basis and can use native system, need the place of carrying out optimum configurations at some simultaneously, be configured with pattern manipulation interface intuitively, all places needing parameters, default common template is configured, and avoiding some professional softwares needs to carry out loaded down with trivial details to arrange the situation just carrying out analytical calculation.
10. monitoring management database, for storing the data that each unit module produces, so that the data call of final-period management analysis and external interface.
As shown in Figure 2, principle of work of the present invention is substantially as follows:
S1, setting top layer soil site base condition;
S2, design ground motion analog parameter;
Each component in S3, project engineering structure and basic factors, setting nonlinear characteristic parameter, basis and lower member;
S4, superstructure and substructure are carried out numerical model process as a whole, the engineering model of generating structure integration;
S5, in analog seismic wave enter basis by veneer of soil Slag, are uploaded to superstructure from substructure, make superstructure cause vibrations to produce inertia dynamic load, represent veneer of soil Slag, dynamic movement between substructure and superstructure;
S6, nonlinear characteristic according to component and ground, push over by anti-section power and the distortion that analytical Calculation goes out each component, generate load-deflection curve;
S7, the surrender earthquake degree determining engineering structure entirety, the parameter such as natural period and ductile performance of equal value;
S8, converse the design maximum displacement of component according to energy conservation principle;
S9, component section power to be verified, comprise moment of flexure and shearing force etc.;
S10, carry out anti-seismic performance check, comprise component damage and check and the check of lower member stability, if defective, then return step S3.
As being applied in Bridge Earthquake Resistance Design, adopt structure-integrated computing method, consider the nonlinear characteristic of component and ground spring, by carrying out bridge pier anti-pushing over the section power and distortion of resolving and calculating each component and after determining its natural period of equal value, the design maximum displacement of pier coping portion when conversing earthquake according to energy conservation principle.Then, the deformation state on the component corresponding with the displacement of pier coping portion design maximum and basis is checked, the final purpose of quantitative evaluation component damage performance and basic roadholding can be reached.
Claims (9)
1. the seismic design system of structure based integration, is characterized in that it comprises:
Component setup unit: comprise surface soil Slag setting module, upper component setting module and lower member setting module, surface soil Slag setting module, upper component setting module and lower member setting module set surperficial soil site base condition, upper component and lower member parameter according to nonlinear characteristic or structural elasto-plastic response respectively;
Model generation unit: the component model stored in Component-Based Development database, the condition set by component setup unit and parameter, carry out numerical model process as a whole by superstructure and substructure, the engineering model of generating structure integration;
Earthquake synthesis unit: Enactive earthquake force intensity, produces seismic wave in analog, will enter lower member by seismic wave in analog, then be uploaded to upper component from lower member by veneer of soil Slag.
2. the seismic design system of structure based integration according to claim 1, is characterized in that: described model generation unit adopts equivalent energy method to increase the stability of engineering model.
3. the seismic design system of structure based integration according to claim 1, it is characterized in that: also comprise resisting and push over resolution unit, described resisting pushes over resolution unit for the nonlinear characteristic according to component and ground, section power and the distortion that analytical Calculation goes out each component is pushed over by anti-, generate load-deflection curve, and determine the natural period of equal value of each component.
4. the seismic design system of structure based integration according to claim 1, it is characterized in that: also comprise lesion quantification unit, described lesion quantification unit is used for the design maximum displacement conversing component according to energy conservation principle, and index reflects the faulted condition that simulated earthquake causes engineering structure by quantifying.
5. the seismic design system of structure based integration according to claim 1, it is characterized in that: also comprise antidetonation and check unit, described antidetonation is checked unit and is used for deformation state corresponding in simulated earthquake with it for the design maximum displacement of component to check; Different quantizating index is adopted to carry out automatic Verification according to faulted condition, the roadholding of quantitative evaluation upper component damage performance and lower member.
6. the seismic design system of structure based integration according to claim 1, it is characterized in that: also comprise displacement control unit, described displacement control unit is used in simulated earthquake, control the displacement of upper component, avoid the actual displacement of upper component under the effect of seismic force comparatively large and produce destruction.
7. the seismic design system of structure based integration according to claim 1, is characterized in that: also comprise shear failure checking computations unit, by concrete component shear failure algorithm, and the shear resistance of checking computations needed for component.
8. the seismic design system of structure based integration according to claim 1, it is characterized in that: also comprise human-computer interaction interface, described human-computer interaction interface has been used for parameter setting operation, when representing simulated earthquake, veneer of soil Slag, dynamic movement between substructure and superstructure, complete the operation of antidetonation forecast assessment.
9. the seismic design system of structure based integration according to claim 1, is characterized in that: also comprise monitoring management database, for storing the data that each unit module produces, so that the data call of final-period management analysis and external interface.
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| CN106897510A (en) * | 2017-02-16 | 2017-06-27 | 西南交通大学 | A kind of bridge structure 3-D seismics vulnerability analysis method |
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