钢筋混凝土核心筒受力性能非线性有限元研究
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摘要
由于核心筒结构原型尺寸较大,采用试验方法研究有着较大的条件限制,通过非线性软件进行弹塑性分析是一种重要的研究手段.通过采用双曲四节点薄壳单元S4R模拟核心筒墙肢,建立核心筒非线性模型,对钢筋混凝土核心筒抗震性能试验进行有限元模拟,模拟了核心筒破坏全过程;研究了不同轴压比、连梁刚度及高宽比对核心筒力学性能的影响,并与试验进行对比.分析结果表明:数值模拟结果与试验结果吻合较好,研究结果对混凝土核心筒的抗震性能计算具有一定的参考价值.
Due to the large size of the reinforced concrete(RC) core walls,experimental research method has great restrictions.Using the nonlinear analysis software for stress and seismic response simulation is an important research means.A hyperbolic four nodes thin shell element(S4R) is used to simulate the wall legs of core walls.Based on shell element,the process simulation of a seismic behavior testing on reinforced concrete core walls is presented.The influences of axial compression ratio,coupling beams stiffness and ratio of height to width on the capacity and deformation performance of RC core walls are analyzed systemically.The results from the simulation match well with those from the tests and the numerical simulation conclusions in this paper are helpful in the seismic performance calculation of RC core walls or high-rise building.
Due to the large size of the reinforced concrete(RC) core walls,experimental research method has great restrictions.Using the nonlinear analysis software for stress and seismic response simulation is an important research means.A hyperbolic four nodes thin shell element(S4R) is used to simulate the wall legs of core walls.Based on shell element,the process simulation of a seismic behavior testing on reinforced concrete core walls is presented.The influences of axial compression ratio,coupling beams stiffness and ratio of height to width on the capacity and deformation performance of RC core walls are analyzed systemically.The results from the simulation match well with those from the tests and the numerical simulation conclusions in this paper are helpful in the seismic performance calculation of RC core walls or high-rise building.
引文
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[2]林旭川,陆新征,缪志伟,等.基于分层壳单元RC核心筒结构有限元分析和工程应用[J].土木工程学报,2009,3(3):51-56.LING Xu-chuan,LU Xin-zheng,MI UZhi-wei,et al.Finite element analysis and engineering application of RCcore-tube structures based on the multi-layer shell elements[J].China Civil Engineering Journal,2009,3(3):51-56.
[3]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):42-50.LU Xi-lin,LI Jun-lan.Seismic behavior of reinforced concrete core walls subjected to cyclic loading[J].EarthquakeEngineering and Engineering Vibration,2002,22(3):42-50.
[4]王伟.钢筋混凝土核心筒的非线性分析[D].西安:西安建筑科技大学,2009.WANG Wei.Nonlinear analysis of reinforced concrete core walls[D].Xi′an:Xi′an Univ.of Arch.And Tech.,2009.
[5]楚留声,白国良,赵更岐.型钢混凝土框架-钢筋混凝土筒体混合结构位移特征及控制[J].西安建筑科技大学学报:自然科学版,2009,41(6):709-804.CHU Liu-sheng,BAI Guo-liang,ZHAO Geng-qi.The displacement chara cteristic and control of steel reinforcedconcrete frame-reinforced concrete core wall hybrid stracture[J].J.Xi′an Univ.of Arch.&Tech.(Natural ScienceEdition),2009,41(6):709-804.
[6]吕西林,龚治国.某复杂高层建筑结构弹塑性时程分析及抗震性能评估[J].西安建筑科技大学学报:自然科学版,2006,38(5):593-602.LV Xi-lin,GONG Zhi-guo.Elasto-plastic ti me history analysis and seismic behavior evalnation on a complen high-rise building structure[J].J.Xi′an Univ.of Arch.&Tech.(Natural Science Edition),2006,38(5):593-602.
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