混凝土核心筒水平受力性能的非线性有限元分析
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摘要
钢筋混凝土核心筒作为高层建筑结构体系抗震设计的关键构件,为研究其抗震性能,本文应用ABAQUS非线性有限元分析软件,对核心筒进行模拟。在利用大比例试件的试验结果对该有限元模型验证的基础上,对具有不同构造条件的钢筋混凝土核心筒进行了水平受力性能的分析研究,所考虑的影响因素有:洞口大小、混凝土强度、连梁跨高比,以及采用双连梁的改进措施。研究表明,混凝土强度对核心筒的性能影响显著;洞口大小对连梁和墙肢的破坏特征有较大影响;采用双连梁构造能明显改善筒体的延性而承载力降低很少,因而是改善筒体抗震性能的一项可行措施。
The reinforced concrete core wall is the key element in high-rise buildings for seismic design.In order to study the seismic performance of core walls,this paper deals with finite element(FE)analysis of the concrete core wall under lateral loading.The FE model,using the software ABAQUS,is proposed to carried out the nonlinear analysis and is verified by comparing the computational results with the corresponding experimental ones obtained from laboratory tests of large-scale specimens.On this basis,a series of reinforced concrete core walls with different parameters are simulated and analyzed under lateral loading,which include their opening sizes,concrete strengths and span-height ratios of coupling beams.The core wall with double coupling beams is also studied and compared with that with single coupling beams.The results show that concrete strengths have a significant effect on the performance of core walls;opening sizes play an important role in the failure of coupling beams and wall piers;with the use of double coupling beams,the ductility of core walls is significantly improved while their load-carrying capacity is just slightly reduced,so it is a feasible measure improving the seismic performance of concrete core walls.
The reinforced concrete core wall is the key element in high-rise buildings for seismic design.In order to study the seismic performance of core walls,this paper deals with finite element(FE)analysis of the concrete core wall under lateral loading.The FE model,using the software ABAQUS,is proposed to carried out the nonlinear analysis and is verified by comparing the computational results with the corresponding experimental ones obtained from laboratory tests of large-scale specimens.On this basis,a series of reinforced concrete core walls with different parameters are simulated and analyzed under lateral loading,which include their opening sizes,concrete strengths and span-height ratios of coupling beams.The core wall with double coupling beams is also studied and compared with that with single coupling beams.The results show that concrete strengths have a significant effect on the performance of core walls;opening sizes play an important role in the failure of coupling beams and wall piers;with the use of double coupling beams,the ductility of core walls is significantly improved while their load-carrying capacity is just slightly reduced,so it is a feasible measure improving the seismic performance of concrete core walls.
引文
[1]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(增2):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))
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[4]李国强,周向明,丁翔.高层建筑钢-混凝土混合结构模型模拟地震振动台试验研究[J].建筑结构学报,2001,22(2):2-7(Li Guoqiang,Zhou Xiangming,Ding Xiang.Shaking table study on a model of steel-concrete hybrid structure tall buildings[J].Journal of Buiding Structures,2001,22(2):2-7(in Chinese))
[5]Nakachi T.Experimental study on deformation capacity of reinforced concrete core walls after flexural yielding[C]//Proceedings of the11th WCEE.Mexico:Elsevier Science,1996:1747
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[7]Sugaya K,Teshigawara M,Kato M,et al.Experimental study on carrying shear force ratio of12-story coupled shear wall[C]//Proceedings of the12th WCEE.New Zealand:The NewZealand Society for Earthquake Engineering,2000
[8]Habasaki A,Kitaday Y,Nishikawat T,et al.Multi-directional loading test for RC seismic shear walls[C]//Proceedings of the12th WCEE.New Zealand:The New Zealand Society for Earthquake Engineering,2000:454
[9]周忠发,赵均.混凝土核心筒的有限元模拟及若干参数影响分析[J].防灾减灾工程学报,2010,30(6):661-667(Zhou Zhongfa,Zhao Jun.Finite element modeling and parametric analysis of the concrete core wall[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(6):661-667(in Chinese))
[10]王亚勇.汶川地震建筑震害启示—抗震概念设计[J].建筑结构学报,2008,29(4):20-25(Wang Yayong.Lessons learnt from building damages in the Wenchuan earthquake—seismic concept design of buildings[J].Journal of Building Structures,2008,29(4):20-25(in Chinese))
[11]李奎明,李杰.钢筋混凝土双连梁短肢剪力墙结构试验研究[J].同济大学学报:自然科学版,2009,37(5):587-596(Li Kuiming,Li Jie.Experimental study on reinforced concrete short-leg shear walls with dual binding beams[J].Journal of Tongji University:Natural Science Edition,2009,37(5):587-596(in Chinese))
[2]吕西林,李俊兰.钢筋混凝土核心筒体抗震性能试验研究[J].地震工程与工程振动,2002,22(3):41-50(LüXilin,Li Junlan.Seismic behavior of reinforced concrete core walls subjected to cyclic loading[J].Earthquake Engineering and Engineering Vibartion,2002,22(3):41-50(in Chinese))
[3]曹万林,常卫华,张建伟,等.内藏钢桁架带洞口混凝土组合核心筒抗震试验及分析[J].东南大学学报:自然科学版,2008,38(2):283-288(Cao Wanlin,Chang Weihua,Zhang Jianwei,et al.Experimental study on seismic behavior of RC composite perforated core walls with concealed steel truss[J].Journal of Southeast University:Natural Science Edition,2008,38(2):283-288(in Chinese))
[4]李国强,周向明,丁翔.高层建筑钢-混凝土混合结构模型模拟地震振动台试验研究[J].建筑结构学报,2001,22(2):2-7(Li Guoqiang,Zhou Xiangming,Ding Xiang.Shaking table study on a model of steel-concrete hybrid structure tall buildings[J].Journal of Buiding Structures,2001,22(2):2-7(in Chinese))
[5]Nakachi T.Experimental study on deformation capacity of reinforced concrete core walls after flexural yielding[C]//Proceedings of the11th WCEE.Mexico:Elsevier Science,1996:1747
[6]Maruta M,Suzukin,Miyashitat,et al.Structural capacities of H-shaped RC core wall subjected to lateral load and torsion[C]//Proceedings of the12th WCEE.New Zealand:The NewZealand Society for Earthquake Engineering,2000:1028
[7]Sugaya K,Teshigawara M,Kato M,et al.Experimental study on carrying shear force ratio of12-story coupled shear wall[C]//Proceedings of the12th WCEE.New Zealand:The NewZealand Society for Earthquake Engineering,2000
[8]Habasaki A,Kitaday Y,Nishikawat T,et al.Multi-directional loading test for RC seismic shear walls[C]//Proceedings of the12th WCEE.New Zealand:The New Zealand Society for Earthquake Engineering,2000:454
[9]周忠发,赵均.混凝土核心筒的有限元模拟及若干参数影响分析[J].防灾减灾工程学报,2010,30(6):661-667(Zhou Zhongfa,Zhao Jun.Finite element modeling and parametric analysis of the concrete core wall[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(6):661-667(in Chinese))
[10]王亚勇.汶川地震建筑震害启示—抗震概念设计[J].建筑结构学报,2008,29(4):20-25(Wang Yayong.Lessons learnt from building damages in the Wenchuan earthquake—seismic concept design of buildings[J].Journal of Building Structures,2008,29(4):20-25(in Chinese))
[11]李奎明,李杰.钢筋混凝土双连梁短肢剪力墙结构试验研究[J].同济大学学报:自然科学版,2009,37(5):587-596(Li Kuiming,Li Jie.Experimental study on reinforced concrete short-leg shear walls with dual binding beams[J].Journal of Tongji University:Natural Science Edition,2009,37(5):587-596(in Chinese))
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