半刚性连接钢管混凝土框架动力特性的非线性有限元分析
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摘要
应用有限元软件ABAQUS建立半刚性连接的钢管混凝土平面框架模型,采用SPRING2单元模拟半刚性节点,节点采用具有半刚性特性的不同弯矩-转角曲线作为约束条件。对比了2层两跨半刚性框架试验的荷载-位移模拟曲线和试验曲线进行模型验证。基于验证结果,对一典型6层三跨半刚性连接的钢管混凝土框架进行了模拟,分析不同连接刚度条件对钢管混凝土组合框架的抗震性能影响。结果表明:半刚性连接对钢管混凝土框架结构的抗震性能影响显著。相对于刚接,采用半刚性连接时,钢管混凝土框架结构底层剪力明显减小,低阶振型的自振周期增大,结构动力响应变化很大。
A semi-rigid connection model of the composite planar frame with concrete-filled steel tubular(CFST) columns is established using ABAQUS,and the semi-rigid connection is simulated with SPRING2 element in ABAQUS elements library.Different moment versus rotation relationships with semi-rigid characteristic are used to describe the behavior of the connection constraint.The model is verified by comparing the simulated load versus displacement curves with the others experimental results of a two-floor-span semi-rigid frame with CFST tubular columns.Based on the model,a six-floor-three-span plane frame is simulated and the influence to the seismic performance of the composite frame under different connection rigidity is analyzed.The results show that the rigidity of the semi-rigid connection of the frame with CFST columns significantly affects the seismic performance.Unlike the rigid conection for the composite frames with CFST columns,the bottom shear forces of the semi-rigid connections are reduced clearly,the natural periods of low-level order are increased,and the dynamic response is changed obviously.
A semi-rigid connection model of the composite planar frame with concrete-filled steel tubular(CFST) columns is established using ABAQUS,and the semi-rigid connection is simulated with SPRING2 element in ABAQUS elements library.Different moment versus rotation relationships with semi-rigid characteristic are used to describe the behavior of the connection constraint.The model is verified by comparing the simulated load versus displacement curves with the others experimental results of a two-floor-span semi-rigid frame with CFST tubular columns.Based on the model,a six-floor-three-span plane frame is simulated and the influence to the seismic performance of the composite frame under different connection rigidity is analyzed.The results show that the rigidity of the semi-rigid connection of the frame with CFST columns significantly affects the seismic performance.Unlike the rigid conection for the composite frames with CFST columns,the bottom shear forces of the semi-rigid connections are reduced clearly,the natural periods of low-level order are increased,and the dynamic response is changed obviously.
引文
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[10]黄冀卓,王湛,潘建荣.钢结构梁柱连接节点刚度的半解析测试方法[J].工程力学,2011,28(1):105～115.Huang Ji-zhuo,Wang Zhan,Pan Jian-rong.Semi-analytical Method for Beam-to-column Connection Rigidity of Steel Structures[J].Engineering Mechanics,2011,28(1):105～115(in Chinese)
[11]丁洁民,沈祖炎.一种半刚性节点的实用计算模型[J].工业建筑,1990,20(6):29～32 Ding Jie-min,Shen Zu-yan.A Practical Calculating Model for Semi-rigid Connections[J].Industrial Construction,1990,20(6):29～32(in Chinese)
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[13]韩林海,陶忠,王文达.现代组合结构和混合结构—试验、理论和方法[M].北京:中国建筑工业出版社,2009 Han Lin-hai,Tao Zhong,Wang Wen-da.Advanced Composite and Mixed Structures-testing,Theory and Approach[M].Beijing:China Architecture and Building Press,2009(in Chinese)
[14]王湛,陈曦.加强环式钢管混凝土框架节点计算模型的研究[J].建筑结构学报,2006,191～194 Wang Zhan,Chen Xi.Research on Analytical Model of Joint in Concrete-filled Steel Tubular Frame with Stiffening Ring[J].Journal of Building Structures,2006:191～194(in Chinese)
[2]The ASCE Task Committee on Design Criteria for Composite Structures in Steel and Concrete.Design Guide for Partially Restrained Composite Connections[J].Structural Engineering,1998,10:1099～1113
[3]Nethercot D A,Li T Q,Ahmed B.Unified Classification System for Beam-to-column Connections[J].Journal of Constructional Steel Research,1998,46(1-3):238～240
[4]Li T Q,Nethercot D A,Choo B S.Behaviour of FlushEnd-plate Composite Connections with Unbalanceed Moment and Variable Shear/moment Ratios-I[J].Experimental behaviour,Journal of Constructional Steel Research,1996,38(2):125～164
[5]Elnashai A S,Elghzouli A Y,Denesh-Ashtiani F A.Response of Semi-rigid Steel Frames to Cyclic and Earthquake Loads[J].Journal of Structural Engineering,1998,124(8):857～867
[6]葛继平,宗周红,杨强跃.方钢管混凝土柱与钢梁半刚性连接节点的恢复力本构模型[J].地震工程与工程振动,2005,25(6):81～87 Ge Ji-ping,Zong Zhou-hong,Yang Qiang-yue.Restoring Force Constitutive Models of Concrete-filled Square Steel Tubular Column-to-steel Beam Semi-rigid Connections[J].Earthquake Engineering and Engineering Vibration,2005,25(6):81～87(in Chinese)
[7]陈鹃,王湛,袁继雄.加强环式钢管混凝土柱-钢梁节点的刚性研究[J].建筑结构学报,2004,25(4):43～53 Chen Juan,Wang Zhan,Yuan Ji-xiong.Research on the Stiffness of Concrete Filled Tubular Column and Steel Beam Joint with Stiffening Ring[J].Journal of Building Structures,2004,25(4):43～53(in Chinese)
[8]孙修礼,蒋永生,梁书亭.半刚性连接对钢管混凝土框架结构设计的影响[J].钢结构,2005,20(4):29～31 Sun Xiu-li,Jiang Yong-sheng,Liang Shu-ting.Effect of Semi-rigid Connections on Design in Concrete Filled Steel Tube Frame[J].Steel Construction,2005,20(4):29～31(in Chinese)
[9]郭兵,陈爱国.半刚接钢框架的有限元分析及性能探讨[J].建筑结构学报,2001,22(5):48～52 Guo Bing,Chen Ai-guo.Finite Element Analysis andBehavior of Semi-rigid Steel Frames[J].Journal of Building Structures,2001,22(5):48～52(in Chinese)
[10]黄冀卓,王湛,潘建荣.钢结构梁柱连接节点刚度的半解析测试方法[J].工程力学,2011,28(1):105～115.Huang Ji-zhuo,Wang Zhan,Pan Jian-rong.Semi-analytical Method for Beam-to-column Connection Rigidity of Steel Structures[J].Engineering Mechanics,2011,28(1):105～115(in Chinese)
[11]丁洁民,沈祖炎.一种半刚性节点的实用计算模型[J].工业建筑,1990,20(6):29～32 Ding Jie-min,Shen Zu-yan.A Practical Calculating Model for Semi-rigid Connections[J].Industrial Construction,1990,20(6):29～32(in Chinese)
[12]孙修礼,梁书亭,王群依.半刚性连接框架结构的动力特性研究[J].工程抗震与加固改造,2005,27(1):16～18 Sun Xiu-li,Liang Shu-ting,Wang Qun-yi.Study on the Dynamic Properties of Semi-rigid Frame Structure[J].Earthquake Resistant Engineering and Ritrofitting,2005,27(1):16～18(in Chinese)
[13]韩林海,陶忠,王文达.现代组合结构和混合结构—试验、理论和方法[M].北京:中国建筑工业出版社,2009 Han Lin-hai,Tao Zhong,Wang Wen-da.Advanced Composite and Mixed Structures-testing,Theory and Approach[M].Beijing:China Architecture and Building Press,2009(in Chinese)
[14]王湛,陈曦.加强环式钢管混凝土框架节点计算模型的研究[J].建筑结构学报,2006,191～194 Wang Zhan,Chen Xi.Research on Analytical Model of Joint in Concrete-filled Steel Tubular Frame with Stiffening Ring[J].Journal of Building Structures,2006:191～194(in Chinese)
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