Study On Incremental Dynamic Analysis Of High Rise Shear Wall Structure Based On Shaking Table Test

Incremental dynamic analysis is undoubtedly the most potential analytical method in the performance-based earthquake engineering,but at present this method has not been tested.Shaking table test is the most direct method to investigate the seismic response and failure mechanism of the structures in laboratory,and is also one of the important means to study and evaluate the seismic performance of the structures.It is worth noting that both the incremental dynamic analysis method and shaking table test investigate the seismic behavior of the structure under the increasing risk levels of the earthquake through the amplitude modulation of seismic waves.In this paper,experimental and numerical simulation methods were combined for the goal of verifying the validity of incremental dynamic analysis.The main research work is as follows:(1)The details of incremental dynamic analysis are introduced.Incremental dynamic analysis method is expounded from the following aspects: the basic principles of incremental dynamic analysis,the implementation steps,the rule of amplitude modulation computation,the selection of parameters,the definition of limit state,the shape of IDA curve and the processing methods.Furthermore,the current research status of the incremental dynamic analysis method at home and abroad is reviewed.(2)A shaking table test of 12-story RC shear wall structure is carried out.The design of similitude of shaking table test,the selection of model material,the construction of model structure,sensor arrangement and seismic waves selection and loading are introduced in detail.The dynamic performance of the model structure,acceleration response,displacement response and hysteretic energy consumption of the model are analyzed,and the overall seismic performance of the structure is evaluated.The results show that the shaking table test model can simulate the response of the prototype structure in the earthquake,and the maximum story drift ratio satisfies the maximum story drift ratio requirement for the shear wall structure in Code for Seismic Design of Building of China.Referring to the processing method of IDA curves,the shaking table test data are analyzed.The seismic performance of the structure is evaluated from incremental dynamic analysis,three levels seismic fortification and probability respectively.(3)ABAQUS model of 12-story RC shear wall structure and its seismic performance analysis are introduced.The ABAQUS element type selection,focusing on the ABAQUS parameters setting which selects damage plasticity model of concrete to simulate the nonlinear behavior of concrete,is introduced.According to the material test results of the pre-test blocks and specimens and Code for Design of Concrete Structures,the parameters for material constitutive in the ABAQUS model are determined.Modal analysis and elasto-plastic analysis of the ABAQUS model are carried out.The validity of the ABAQUS model and parameter settings is verified by comparing the numerical analysis results with the experimental results.(4)The consecutive computation of the ABAQUS model is carried out in consideration of cumulative damage during the shaking table test.In order to consider the impact of cumulative damage during shaking table test on the evaluation results of the seismic performance,the consecutive computation of the ABAQUS model is carried out according to the loading sequence of the shaking table test in this paper.The seismic waves of all the working conditions experienced in the shaking table test is connected.The input of seismic waves in ABAQUS model is input strictly according to the loading order of seismic waves in shaking table test.The results of consecutive computation and shaking table test are compared and analyzed from the angles of roof acceleration response,displacement response,base shear response,hysteretic curve and structural damage.(5)The conventional IDA analysis of 12 storey shear wall structure and its comparison with shaking table test results and consecutive computation results are introduced.A single record IDA analysis under the action of one seismic wave on the structure is carried out,and the analysis process of the IDA method is explained in detail.Fifteen seismic waves were selected to conduct multi-record IDA analysis under the action of multiple fifteen seismic waves.The seismic performance of the structure was evaluated based on probability through the statistical analysis of IDA curves.The IDA curves obtained from incremental dynamic analysis is compared with the IM-EDP curves obtained by shaking table test and consecutive computation,which provides reference for the research of IDA method and shaking table test.