张俊峰,高健利

• 1:郑州大学土木工程学院

摘要(Abstract)：

空间桁架结构在轴向压力作用下容易发生失稳,采用合理的钢材本构关系进行分析是准确追踪桁架屈曲后行为的有效方法.借助Open Sees软件平台,基于桁架非弹性后屈曲单轴材料本构模型,根据滞回准则,提出了该本构模型新的实现方式;将模型分解为受拉屈服前卸载、受拉屈服后卸载、受压屈服前卸载和受压屈服后卸载4种加卸载路径,基于材料基类编制了空间桁架弹性后屈曲、非弹性后屈曲本构模型,通过算例验证了这些本构模型的正确性,并为如何采用这些模型进行空间桁架结构分析提出了建议.

关键词(KeyWords)： 空间桁架;弹性后屈曲;非弹性后屈曲;滞回准则

Abstract:

Keywords:

基金项目(Foundation): 河南省科技攻关计划项目(142102310345)

作者(Author): 张俊峰,高健利

参考文献(References)：

• [1]周臻,吴京,孟少平.基于初弯曲单元的某弦支穹顶非线性稳定承载力分析[J].计算力学学报,2010,27(4):771—726.
• [2]刘树堂.等直杆单元切线刚度矩阵的精确分析方法[J].计算力学学报,2014,31(1):48—53.
• [3]HILL C,BLANDFORDGG E,WANG S.Post-buckling analysis of steel space trusses[J].Journal of structural engineering,1989,115(4):900—919.
• [4]PAPADRAKAKIS M.Inelastic post-buckling analysis of trusses[J].Journal of structural engineering,ASCE,1983,109(9):2129—2147.
• [5]BLANDFORD G E.Progressive failure analysis of inelastic space trussstructures[J].Computers&structures,1996,58(5):981—990.
• [6]RAMESH G,KRISHNAMOORTHY C.Inelastic post-buckling analysis of truss structures by dynamic relaxation method[J].International journal for numerical methods in engineering,1994,37(21):3633—3657.
• [7]BLANDFORD G E.Large deformation analysis of inelastic space truss structures[J].Journal of structural engineering,ASCE,1996,122(4):407—415.
• [8]THAI H T,KIM S E.Nonlinear inelastic time-history analysis of truss structures[J].Constructional steel research,2011,67(12):1966—1972.
• [9]YU Y,ZHAO X H,LUOY Z.Multi-snap-through and dynamic fracture based on finite particle method[J].Journal of constructional steel research,2013,82(1):142—152.
• [10]THAI H T,KIM S E.Large deflection inelastic analysis of space trusses using generalized displacement control method[J].Journal of constructional steel research,2009,65(10/11):1987—1994.
• [11]FRANK M,GREGORY L F.Introducing a newmaterial into Open Sees[R].Berkeley:University of California,2000.