Pushover And Time History Analysis Of Super High-rise Farme-core Tube Buildings

This paper introduces the application of pushover and time history analysis andresearch status in practical engineering, Based on practical engineering structure model, therespectively for the static and dynamic elastoplastic analysis and research. First use ETABSsoftware to analysis the response spectrum analysis and the elastic, check under earthquakecan meet the "small earthquake not bad", has designed three kinds of reinforcement scheme,analysis the effect of the scheme for the structure properties; and then use PUSH to dostatic elasto-plastic analysis, elastic-plastic deformation and failure of the structure underthe action of earthquake and the development of plastic hinge distribution node analysis(including the comparison of maximum layer representative displacement angle is1/833,1/531,1/203moment, it analyses the change process of the plastic hinge), find the rareearthquake structural weak layer and weak bar, failure analysis mechanism of the structure,to see whether accord with "big to fail" seismic requirements; the bidirectional earthquakeinput, dynamic analysis of elastic plastic EPDA. Analysis of deformation structure in thebidirectional earthquake torsional performance, power calculation of elastoplastic analysisresults are in line with the specification limits, compared with the results of pushoveranalysis; comprehensive static and dynamic elastic-plastic results find weak layer position,put forward to improve the seismic performance measures.The results show that in the structure of side seismic shift to satisfy the seismic coderequirements; improve the strength of concrete and the section size can effectively improvethe stiffness of the structure, which change the section size of the most obvious effect, butthe changes in cross-section to consider the actual factors of construction, feasibility is nothigh, the general suggestions on the selection of improved scheme of concrete strength;static pushover analysis and time history analysis results, the structures of plastic hinge,butthe structure of the displacement response is less than specification admissibledisplacement limit value.