基于分层壳单元的RC核心筒结构有限元分析和工程应用
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摘要
钢筋混凝土(RC)核心筒是高层建筑中常见的抗侧力结构,其空间受力行为明显,截面形状多样,故准确模拟其非线性受力全过程是结构抗震分析的一个重要课题。分层壳单元根据复合材料原理将壳分成多层,可考虑面内弯曲-面内剪切-面外弯曲之间的耦合作用,能够较全面地反映壳体结构的空间力学性能。基于分层壳单元,对一钢筋混凝土核心筒拟静力试验进行了全过程模拟。通过对墙体、连梁等关键部位合理建模,较好地反映了核心筒的空间受力行为,以及筒体开裂、筒体钢筋屈服、连梁屈服和剪切破坏等复杂非线性行为,计算结果和试验结果吻合良好。运用该核心筒模型,对某实际高层框架-核心筒结构进行弹塑性分析,表明了模型的实用性。基于分层壳的核心筒模型可以较好地模拟核心筒的各项力学性能,在筒体结构大震弹塑性分析方面具有一定参考意义。
As one of the most widely used lateral resistant structures, reinforced concrete (RC) core tube consists of diverse forms of members and exhibits spatial mechanical behaviors. How to accurately simulate the RC tubes in the process of nonlinear performance is an important problem in seismic analysis of the structures. Based on the multi-layer shell elements, the process simulation of a pseudo-static testing on RC core tubes is presented. By correctly modeling the key parts (such as walls, coupling beams, and reinforcements), the numerical model is capable of simulating the spatial behavior of the tube as well as the complicated nonlinear behavior, such as yielding and shear failure of the coupling beams, cracking of the tube. Results from the simulation match well with those from the tests. An elastoplastic analysis of a framed core-tube structure is conducted to illustrate the implementation of proposed model.
As one of the most widely used lateral resistant structures, reinforced concrete (RC) core tube consists of diverse forms of members and exhibits spatial mechanical behaviors. How to accurately simulate the RC tubes in the process of nonlinear performance is an important problem in seismic analysis of the structures. Based on the multi-layer shell elements, the process simulation of a pseudo-static testing on RC core tubes is presented. By correctly modeling the key parts (such as walls, coupling beams, and reinforcements), the numerical model is capable of simulating the spatial behavior of the tube as well as the complicated nonlinear behavior, such as yielding and shear failure of the coupling beams, cracking of the tube. Results from the simulation match well with those from the tests. An elastoplastic analysis of a framed core-tube structure is conducted to illustrate the implementation of proposed model.
引文
[1]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,2006:1-3(Wei Yong.Research on seismic behavior and design method for reinforced concrete core wall-steel frame hybrid structures[D].Beijing:Tsinghua University,2006:1-3(in Chinese))
[2]Miao Z W,Lu X Z,Jiang J J,et al.Nonlinear FE model for RC shear walls based on multi-layer shell element and microplane constitutive model[CD]//Proc.Computational Methods in Engineering And Science.Sanya,Hainan,China:Tsinghua University Press&Springer-Verlag,2006
[3]叶列平,陆新征,马千里,等.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(S2):173-183(Ye Lieping,Lu Xinzheng,Ma Qianli,et al.Nonlinear analytical models,methods and examples for concrete structures subject to earthquake loading[J].Engineering Mechanics,2006,23(S2):173-183(in Chinese))
[4]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(S2):932-935(Miao Zhiwei,Lu Xinzheng,Ye Lieping.Applications of the multi-layer shell element in the finite element analysis of shear wall structures[J].Journal of Building Structures,2006,27(S2):932-935(in Chinese))
[5]缪志伟,陆新征,叶列平,等.高强配筋剪力墙框-剪结构的地震行为研究[J].华中科技大学学报:城市科学版,2007,24(4):1-6(Miao Zhiwei,Lu Xinzheng,Ye Lieping,et al.Study on the seismic performance of frame-shear wall structures with high-strength reinforced the shear wall[J].Journal of Huazhong University of Science and Technology:Urban Science Edition,2007,24(4):1-6(in Chinese))
[6]汪训流.配置高强钢绞线无粘结筋混凝土柱复位性能的研究[D].北京:清华大学,2007:81-85(Wang Xunliu.Research on re-centering behavior of reinforced concrete columns with unbonded high-strength strands[D].Beijing:Tsinghua University,2007:81-85(in Chinese))
[7]LégeronF,PaultreP,MazarJ.Damage mechanics modeling of nonlinear seismic behavior of concrete structures[J].J.Struct.Eng.,ASCE,2005,131(6):946-954
[8]陈勤.钢筋混凝土双肢剪力墙静力弹塑性分析[D].北京:清华大学,2003(Chen Qin.Static inelastic analysis of reinforced concrete coupled shear wall[D].Beijing:Tsinghua University,2003(in Chinese))
[9]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(Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite element analysis of concrete structures[M].Beijing:Tsinghua University Press,2005(in Chinese))
[10]杜修力,贾鹏,赵均.钢筋混凝土核心筒不同轴压比作用下抗震性能试验研究[J].哈尔滨工业大学学报,2007,39(S2):567-572(Du Xiuli,Jia Peng,Zhao Jun.Experimental study on seismic behavior of reinforced concrete core wall under different axial load ratio[J].Journal of Harbin Institute of Technology,2007,39(S2):567-572(in Chinese))
[11]GB 50011-2001建筑抗震设计规范[S](GB 50011-2001 Code for seismic design of building[sS](in Chinese))
[2]Miao Z W,Lu X Z,Jiang J J,et al.Nonlinear FE model for RC shear walls based on multi-layer shell element and microplane constitutive model[CD]//Proc.Computational Methods in Engineering And Science.Sanya,Hainan,China:Tsinghua University Press&Springer-Verlag,2006
[3]叶列平,陆新征,马千里,等.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(S2):173-183(Ye Lieping,Lu Xinzheng,Ma Qianli,et al.Nonlinear analytical models,methods and examples for concrete structures subject to earthquake loading[J].Engineering Mechanics,2006,23(S2):173-183(in Chinese))
[4]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(S2):932-935(Miao Zhiwei,Lu Xinzheng,Ye Lieping.Applications of the multi-layer shell element in the finite element analysis of shear wall structures[J].Journal of Building Structures,2006,27(S2):932-935(in Chinese))
[5]缪志伟,陆新征,叶列平,等.高强配筋剪力墙框-剪结构的地震行为研究[J].华中科技大学学报:城市科学版,2007,24(4):1-6(Miao Zhiwei,Lu Xinzheng,Ye Lieping,et al.Study on the seismic performance of frame-shear wall structures with high-strength reinforced the shear wall[J].Journal of Huazhong University of Science and Technology:Urban Science Edition,2007,24(4):1-6(in Chinese))
[6]汪训流.配置高强钢绞线无粘结筋混凝土柱复位性能的研究[D].北京:清华大学,2007:81-85(Wang Xunliu.Research on re-centering behavior of reinforced concrete columns with unbonded high-strength strands[D].Beijing:Tsinghua University,2007:81-85(in Chinese))
[7]LégeronF,PaultreP,MazarJ.Damage mechanics modeling of nonlinear seismic behavior of concrete structures[J].J.Struct.Eng.,ASCE,2005,131(6):946-954
[8]陈勤.钢筋混凝土双肢剪力墙静力弹塑性分析[D].北京:清华大学,2003(Chen Qin.Static inelastic analysis of reinforced concrete coupled shear wall[D].Beijing:Tsinghua University,2003(in Chinese))
[9]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(Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite element analysis of concrete structures[M].Beijing:Tsinghua University Press,2005(in Chinese))
[10]杜修力,贾鹏,赵均.钢筋混凝土核心筒不同轴压比作用下抗震性能试验研究[J].哈尔滨工业大学学报,2007,39(S2):567-572(Du Xiuli,Jia Peng,Zhao Jun.Experimental study on seismic behavior of reinforced concrete core wall under different axial load ratio[J].Journal of Harbin Institute of Technology,2007,39(S2):567-572(in Chinese))
[11]GB 50011-2001建筑抗震设计规范[S](GB 50011-2001 Code for seismic design of building[sS](in Chinese))
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