Anti-seismic And Anti-collapse Performance Analysis Of RC Frame Structure Based On OpenSEES

Engineering structure anti-earthquake capability is social earthquake disasterprevention system’s first line of defense. Therefore, the anti-earthquake capability ofbuilding, especially collapsed resistance ability is very important for the wholesociety earthquake disaster prevention. RC frame structure is the most popular whichis widely used in the areas where earthquakes often happen for its enough intensity good ductility and strong integrity. So research of anti-seismic performance of RCframe construction plays a key role for reducing losses of life and property in anearthquake.Based on extensive reference to domestic and foreign scholars’ research, athorough study on the anti-seismic and anti-collapse performance of RC frameconstruction is presented in the thesis. The main research contents are as follows:(1) The collapse of the mechanism of RC frame construction is discussed frombeam-column’s and node’s experimental researchs. The collapsed judgment criteria ofRC frame construction is summed up as three categories:①collapsed judgmentcriterion based on the deformation;②collapsed judgment criterion based on themaximum displacement and energy;③collapsed judgment criterion based on stiffness,and these three criterion are discussed respectively.(2) The constitutive models of the concrete and steel, section model and theelement model are analyzed in the thesis. And convergence criteria, nonlineardynamic time-history analysis equation solution in the process of RC frame structurenonlinear analysis are given. A three-span RC frame structure model is establishedthrough setting various parameters about modeling in OpenSEES.(3) The basic principle, calculation principle, analysis procedure of IDA areintroduced. And IDA flow chart of OpenSEES analysis platform is given in the thesis.Two teams and30in all the seismic waves are selected according to the seismic waveto selecting principle of the ATC-63.(4) Structure anti-seismic and anti-collapse fragility analysis is introduced in thethesis. Its analysis steps and calculation formula of collapse margin ratio (CMR) aregiven. Based on RC frame structure nonlinear analysis, the performance seismicdesign thought, and the three-span RC frame structure selected, using the open systemof the earthquake engineering simulation-OpenSEES-as analysis platform, proceeding elastoplastic analysis through applying IDA, structure fragility curve is got and thecollapse margin ration (CMR) is calculated. Then RC frame structure seismicresistance performance collapsed is sensitive analyzed.