钢筋混凝土核心筒结构受力性能的数值模拟
|
摘要
钢筋混凝土核心筒是一种空间性能较好的抗侧力构件,其在地震作用下受力机理复杂,故准确模拟其非线性受力过程是结构抗震分析的重要课题。本文利用先进的数值模拟技术,在已有试验研究的基础上,对混凝土核心筒进行合理建模,并系统分析了轴压比、配筋率、加载角、高宽比和连梁刚度等对混凝土核心筒承载力和变形性能的影响规律。分析结果表明,数值模拟结果和试验结果吻合较好;轴压比、配筋率对核心筒的弹性和弹塑性性能影响显著;加载角和连梁刚度主要影响混凝土筒体开裂后的性能;而高宽比既影响核心筒的承载力和变形性能,又决定着核心筒的破坏形式。研究结果对混凝土核心筒的地震弹塑性计算具有一定的参考价值。
As a kind of lateral resistant structure,reinforced concrete(RC) core tube takes on good spatial working capability and complicated mechanical behaviors under the earthquake function.Therefore,how to accurately simulate the nonlinear behaviors of RC tubes is an important problem in seismic analysis of structures.Based on the existing experiment data and the advanced numerical simulation technique,finite element model of RC tubes are established reasonably.Then the influence of axial compression ratio,reinforcement ratio,load action direction,ratio of height to width and stiffness of coupling beams on the capacity and deformation performance of RC tubes are analyzed systemically.The results from the simulation match well with those from the tests.The axial compression ratio and reinforcement ratio have distinct affect on the elastic and inelastic behavior of RC tubes;the load action direction and stiffness of coupling beams mainly have affect on the post-cracking behavior of RC tubes;the ratio of height to width not only has affect on the capacity and deformation performance,but determine the failure forms of RC tubes.The conclusions in this paper are helpful in the elasto-plastic calculation of RC tubes or high-rise building.
As a kind of lateral resistant structure,reinforced concrete(RC) core tube takes on good spatial working capability and complicated mechanical behaviors under the earthquake function.Therefore,how to accurately simulate the nonlinear behaviors of RC tubes is an important problem in seismic analysis of structures.Based on the existing experiment data and the advanced numerical simulation technique,finite element model of RC tubes are established reasonably.Then the influence of axial compression ratio,reinforcement ratio,load action direction,ratio of height to width and stiffness of coupling beams on the capacity and deformation performance of RC tubes are analyzed systemically.The results from the simulation match well with those from the tests.The axial compression ratio and reinforcement ratio have distinct affect on the elastic and inelastic behavior of RC tubes;the load action direction and stiffness of coupling beams mainly have affect on the post-cracking behavior of RC tubes;the ratio of height to width not only has affect on the capacity and deformation performance,but determine the failure forms of RC tubes.The conclusions in this paper are helpful in the elasto-plastic calculation of RC tubes or high-rise building.
引文
[1]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):42～50Lv Xi-lin,Li Jun-lan.Seismic behavior of reinforced concrete core walls subjected to cyclic loading[J].Earthquake Engineering and Engineering Vibration,2002,22(3):42～50(in Chinese)
[2]曹万林,黄选明,卢智成,吕西林.钢筋混凝土带暗支撑核心筒体抗震性能试验研究[J].地震工程与工程振动,2005,25(3):81～87Cao Wan-lin,Huang Xuan-ming,Lu Zhi-cheng,LüXi-lin.Experimental study on seismic behavior of reinforced concrete core walls with concealed bracings[J].Earthquake Engineering and Engineering Vibration,2005,25(3):81～87(in Chinese)
[3]贾鹏,杜修力,赵均.不同轴压比钢筋混凝土核心筒抗震性能[J].北京工业大学学报,2009,35(1):63～68Jia Peng,Du Xiu-li,Zhao Jun.Seismic behavior of reinforced concrete core wall under different axial load ratio[J].Journal of Beijing University of Technology,2009,35(1):63～68(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):2～7Li Guo-qiang,Zhou Xiang-ming,Ding Xiang.Shaking table study on a model of steel-concrete hybrid structure tall buildings[J].Journal of Building Structures,2001,22(2):2～7(in Chinese)
[5]Makoto Maruta,Norio Suzuki,Takashi Miyashita and Takamasa Nishioka.Structural capacities of H-shaped RC core wall subjected to lateral load and torsion[A].Proceedings of the12th WCEE[C].New Zealand,2000,Paper No.1028
[6]Nakachi T.Experimental study on deformation capacity of reinforced concrete core walls after yielding[A].Proceedings of the11th WCEE[C].Mexico,1996,Paper No.1747
[2]曹万林,黄选明,卢智成,吕西林.钢筋混凝土带暗支撑核心筒体抗震性能试验研究[J].地震工程与工程振动,2005,25(3):81～87Cao Wan-lin,Huang Xuan-ming,Lu Zhi-cheng,LüXi-lin.Experimental study on seismic behavior of reinforced concrete core walls with concealed bracings[J].Earthquake Engineering and Engineering Vibration,2005,25(3):81～87(in Chinese)
[3]贾鹏,杜修力,赵均.不同轴压比钢筋混凝土核心筒抗震性能[J].北京工业大学学报,2009,35(1):63～68Jia Peng,Du Xiu-li,Zhao Jun.Seismic behavior of reinforced concrete core wall under different axial load ratio[J].Journal of Beijing University of Technology,2009,35(1):63～68(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):2～7Li Guo-qiang,Zhou Xiang-ming,Ding Xiang.Shaking table study on a model of steel-concrete hybrid structure tall buildings[J].Journal of Building Structures,2001,22(2):2～7(in Chinese)
[5]Makoto Maruta,Norio Suzuki,Takashi Miyashita and Takamasa Nishioka.Structural capacities of H-shaped RC core wall subjected to lateral load and torsion[A].Proceedings of the12th WCEE[C].New Zealand,2000,Paper No.1028
[6]Nakachi T.Experimental study on deformation capacity of reinforced concrete core walls after yielding[A].Proceedings of the11th WCEE[C].Mexico,1996,Paper No.1747
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心