混合式交錯桁架體系在循環(huán)荷載下的非線性分析
冉紅東1)，蘇明周1)，馬云美2)，顧強(qiáng)3)
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1)西安建筑科技大學(xué)土木工程學(xué)院，710055； 2)中國建筑西北設(shè)計研究院，西安，710003； 3)蘇州科技學(xué)院土木工程系，215011。［提要］對交錯桁架結(jié)構(gòu)抗震性能的研究很少。采用殼單元和梁單元相結(jié)合的三維非線性有限元分析模型，分析了一個混合式交錯桁架結(jié)構(gòu)在循環(huán)荷載作用下的性能，與試驗結(jié)果比較表明，此計算模型精確、高效。對此模型進(jìn)行了循環(huán)荷載下的滯回性能分析。結(jié)果表明，該結(jié)構(gòu)體系具有較好的耗能能力和抗震性能。［關(guān)鍵詞］交錯桁架結(jié)構(gòu)體系；混合式桁架；循環(huán)荷載；滯回性能；有限元Nonlinear Finite Element Analysis for Composite Staggered Truss Steel Structures Under Cyclic Load/Ran Hongdong1，Su Mingzhou1，Ma Yunmei2，Gu Qiang3(1 Xi"an University of Architecture & Technology，Xi"an 710055，China; 2 China Northwest Building Design and Research Institutes,Xi"an 710003,China; 3 Suzhou Science and Technology University,Suzhou 215011,China)Abstract:The research on seismic performance of staggered truss frame structures is very rare. A nonlinear finite element model is induced for analyzing the composite staggered truss steel structure system under cycle load, in which the shell and beam element are applied.It is shown by computed examples that simulation of presented model is accurate and efficient. A hysteresis analysis is made under cyclic load, and the results show that the composite staggered truss steel structure system has better seismic performance.Keywords:staggered truss frame structure system; composite truss; cycle loading； finite element
