Seismic Performance Analysis Of RC Plane Frame Structure Considering Parameter Uncertainty

The simulation validity of nonlinear random response of engineering structure under earthquake is the foundation of seismic design of complex structure.The seismic reliability of the structural system is a quantitative measure of the probabilistic seismic risk assessment of the structure.In this paper,considering the influence of the uncertainty of structural parameters,taking the columns and joint components of reinforced concrete frame structure and the whole frame as the research object,the random nonlinear analysis method(Pushover analysis,hysteretic analysis,dynamic time history analysis)is used to analyze the overall seismic performance of the structure,and the probability distribution of response parameters and the probability distribution of response parameters are given from the component level and the whole structure level Statistical characteristic value.Furthermore,PDEM is used to evaluate the reliability of the whole structure.The main research contents are as follows:(1)Experimental study on quasi-static collapse of reinforced concrete frame structure based on literature and column of reinforced concrete frame structure in Numerical Simulation Competition,the corresponding finite element model is established and the hysteretic performance analysis is carried out based on ABAQUS and OPENSEES finite element platform considering the nonlinearity of materials.The comparison with the experimental results in reference shows that the finite element model is reasonable.(2)Based on the Latin hypercube sampling technology,considering the randomness of material parameters and geometric parameters of components,the random pushover analysis of column components and joint components of reinforced concrete frame structure is carried out in combination with pushover analysis,and the probability distribution and probability eigenvalues of response parameters at component level are obtained.(3)Taking reinforced concrete frame structure as the research object,considering the uncertainty of structural parameters,the nonlinear random seismic response analysis of concrete frame structure based on the randomness of basic parameters is realized by combining structural nonlinear analysis technology and random sampling method,and the probability distribution and probability eigenvalue of seismic response of structure level are obtained.Then,the probability density evolution method and the equivalent extreme event theory are used to realize the overall reliability analysis of the structure,and the seismic reliability based on the overall displacement is obtained to evaluate the seismic performance of the structure.