某钢框架偏心核心筒弹塑性分析
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摘要
结构在大震作用下会进入弹塑性并产生损伤,准确预测地震荷载下结构的非线性行为,对评估结构的抗震安全性具有重要意义。总结了现有的一些结构弹塑性分析模型,并介绍了清华大学土木工程系近年来以通用有限元程序MSC.MARC为平台所开发的一些新的结构弹塑性分析模型。这些模型可以直接将构件的非线性节点力(轴力、剪力和弯矩)、节点变形(平动和转动)和材料的非线性应力—应变行为联系起来,可以模拟各种复杂受力构件的滞回行为和轴力—双向弯曲—剪切耦合行为。同时,借助通用有限元程序方便的前后处理功能和非线性计算功能,这些模型可以准确模拟地震作用下结构的三维非线性地震响应。利用这些工具,对一个实际工程结构进行了静力弹塑性分析和动力弹塑性时程分析,表明这些分析模型可以较好地模拟实际工程结构中的各种弹塑性行为,供科研和工程人员参考。
Structures will enter nonlinear stage during strong earthquakes.Hence accurate prediction for the structural nonlinear behaviors is important to the safety and loss assessment during earthquakes.This paper reviews the existed nonlinear analytic models for structures and presents some novel models for structural nonlinear analysis that recently developed by the Tsinghua university.With these models,the material stress-strain relationship can be connected directly with the force-displacement behavior of the structural elements.So that the complicated coupled axial force-bending moment-shear force behaviors can be properly simulated,as well as the corresponding cycle behaviors.With the secondary development user subroutines,convenient pre and post process functions and extinct nonlinear capacity of general purpose FE software of MSC.MARC,the spatial seismic responds of structures can be precisely simulated.A steel frame-core wall structure with an eccentric tube is analyzed with static pushover and dynamic time-history analysis to demonstrate the applications of the new models.
Structures will enter nonlinear stage during strong earthquakes.Hence accurate prediction for the structural nonlinear behaviors is important to the safety and loss assessment during earthquakes.This paper reviews the existed nonlinear analytic models for structures and presents some novel models for structural nonlinear analysis that recently developed by the Tsinghua university.With these models,the material stress-strain relationship can be connected directly with the force-displacement behavior of the structural elements.So that the complicated coupled axial force-bending moment-shear force behaviors can be properly simulated,as well as the corresponding cycle behaviors.With the secondary development user subroutines,convenient pre and post process functions and extinct nonlinear capacity of general purpose FE software of MSC.MARC,the spatial seismic responds of structures can be precisely simulated.A steel frame-core wall structure with an eccentric tube is analyzed with static pushover and dynamic time-history analysis to demonstrate the applications of the new models.
引文
[1]方鄂华.高层建筑钢筋混凝土结构概念设计[M].北京:机械工业出版社,2004.
[2]吕西林,卢文生.纤维墙元模型在剪力墙结构非线性分析中的应用[J].力学季刊,2005,26(1):72-80.
[3]Spacone E,Filippou F,Taucer F.Fiber beam-column modeling fornon-linear analysis of R/C frames[J].Journal of Earthquake En-gineering and Structural Dynamics,1996,25(7):711-725.
[4]D Ambrisi A,Filippou F.Modeling of cyclic shear behavior in RCmembers[J].Journal of Structural Engineering,ASCE,1999,125(10):1143-1149.
[5]秦从律,张爱晖.基于截面纤维模型的弹塑性时程分析方法[J].浙江大学学报(工学版),2005,39(7):1003-1008.
[6]伍永飞,周德源.纤维模型在平面框架非线性静力分析中的应用[J].东南大学学报(自然科学版),2005,35(Sup.I):129-132.
[7]陆新征,缪志伟,江见鲸,叶列平.静力和动力荷载作用下混凝土高层结构的倒塌模拟[J].山西地震,2006,126(2):7-11.
[8]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.
[9]缪志伟,陆新征,叶列平.分层壳单元在剪力墙结构有限元计算中的应用[J].建筑结构学报,2006,27(Sup.2):932-935.
[10]Bazant Z P,Caner F C,Carol I,Adley MD,Akers S A.Microplanemodel M4 for concrete(I):formulation with work-conjugate devia-toric stress[J].Journal of Engineering Mechanics,ASCE,2000,126(9):944-953.
[11]魏勇.外钢框架—混凝土核心筒抗震性能及设计方法研究[D].北京:清华大学,2006.
[12]叶列平,陆新征,马千里,汪训流,缪志伟.混凝土结构抗震非线性分析模型、方法及算例[J].工程力学,2006,23(Sup.):173-183.
[2]吕西林,卢文生.纤维墙元模型在剪力墙结构非线性分析中的应用[J].力学季刊,2005,26(1):72-80.
[3]Spacone E,Filippou F,Taucer F.Fiber beam-column modeling fornon-linear analysis of R/C frames[J].Journal of Earthquake En-gineering and Structural Dynamics,1996,25(7):711-725.
[4]D Ambrisi A,Filippou F.Modeling of cyclic shear behavior in RCmembers[J].Journal of Structural Engineering,ASCE,1999,125(10):1143-1149.
[5]秦从律,张爱晖.基于截面纤维模型的弹塑性时程分析方法[J].浙江大学学报(工学版),2005,39(7):1003-1008.
[6]伍永飞,周德源.纤维模型在平面框架非线性静力分析中的应用[J].东南大学学报(自然科学版),2005,35(Sup.I):129-132.
[7]陆新征,缪志伟,江见鲸,叶列平.静力和动力荷载作用下混凝土高层结构的倒塌模拟[J].山西地震,2006,126(2):7-11.
[8]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.
[9]缪志伟,陆新征,叶列平.分层壳单元在剪力墙结构有限元计算中的应用[J].建筑结构学报,2006,27(Sup.2):932-935.
[10]Bazant Z P,Caner F C,Carol I,Adley MD,Akers S A.Microplanemodel M4 for concrete(I):formulation with work-conjugate devia-toric stress[J].Journal of Engineering Mechanics,ASCE,2000,126(9):944-953.
[11]魏勇.外钢框架—混凝土核心筒抗震性能及设计方法研究[D].北京:清华大学,2006.
[12]叶列平,陆新征,马千里,汪训流,缪志伟.混凝土结构抗震非线性分析模型、方法及算例[J].工程力学,2006,23(Sup.):173-183.
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