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《Sichuan Building Science》 2013-04
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Structure stability analysis for shell structure under earthquake action

LIU Zhiqin1,LIU Qin2,MA Qianying3(1.Department of Civil and Material Engineering,Henan Uinversity of Urban Construction,Pingdingshan 467036,China;2.Department of Construction Engineering Management,Henan Uinversity of Urban Construction,Pingdingshan 467036,China;3.School of Civil Engineering,Changan University,Xi'an 710064,China)  
Large-span space latticed shell is imperfection sensitivity structure,dynamic stability is more prominent under earthquake action.In order to obtain the general rules of dynamic stability,considering integral performance,seismic load transformed into function form of quantitative analysis,the theory of dynamic stability binding finite element,derived differential equation for dynamic stability region,solving the equation,dynamic instability region was obtained,even the amplitude of dynamic load is far less than the critical value of static instability,the structure liables to unstable phenomenon;the discrimination of dynamic stability using B-R criterion and time-frozen method,loads on supporting structure in dynamic stability region,maximum displacement of structure constantly gradually widens with time increasing,movement tendency is divergent;load case beyond dynamic stability region,maximum displacement gradually reduces with time increasing,integral structure is stable.
【Fund】: 河南省科技攻关重点项目(112102210361)
【CateGory Index】: TU399;TU311.2
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