The Local Elastic-plastic Earthquake Response Analysis Of Reinforced Concrete Structure

Earthquake is one of the most serious natural disasters that human society faces, China is located between circum-pacific seismic belt and Eurasian seismic belt, earthquakes are characterized by high frequency、intensity、wide distribution、large casualties and severe loss。Reinforced concrete structures as a common structure, are widely used in various industrial and civil building design。The structure will transfer into elastic-plastic stage, the stiffness will be changed, plastic hinge will be formed in the end of the beam and column, resulting in the Redistribution of plastic stress Under seldom occurred earthquake。Based on the systematic analysis and summarization of current domestic and international earthquake resistance research of structure, by using general FEM software ANSYS and considering local elastic-plastic of structure, the elastic-plastic earthquake response of reinforced concrete structure is analyzed。The main content is organized as follows:1、This article briefly describes and reviews the current situation of domestic and international study on the elastic-plastic analysis of frame structure; Make a systematic description for elastic-plastic analysis by using structure models and hysteretic models; Make relevant presentations on three types of inflection points on bilinear restoring force model, and give the corresponding treatment method。2、The thesis Uses ANSYS software to establish the elastic-plastic analysis model of single-multi degree of freedom, and does a research on the time history response of the structure and the corresponding hysteresis curve under seismic action by using bilinear restoring force model。In order to illustrate the reliability and accuracy of the ANSYS analysis results, compile the corresponding computer program by using the MATLAB, and finally compare the analysis results of ANSYS with MATLAB software from several aspects。3、Based on premise of the hypothesis and according to constitutive relationship of the steel and concrete, moment-curvature relationship of the reinforced concrete cross-section is derived。Based on MATLAB, compile the corresponding computer program, In order to ensure the reliability and accuracy of calculations, take a beam for example and compare the result with related literature、formula。4、Based on Numerical simulation and Considering the local elastic-plastic of the framework structure, analyze a frame structure by using three different sets of seismic waves。By changing the relevant parameters, the paper tried to analyze the dynamic time history response and the corresponding hysteretic curve of the frame structure in the case of parameter changes。Through comparative analysis and conclusion we have drawn some useful conclusions, which have reference value and guidance。...