考虑节点半刚性影响的预压装配式PC框架内力分析
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摘要
考虑节点半刚性的影响下,建立了预压装配式预应力混凝土框架在竖向荷载作用下的内力分析模型,采用螺旋弹簧模拟节点连接的半刚性,导出了梁端节点相对转动刚度K不同时的杆件单元刚度矩阵,并对试验框架进行了受力验算。研究表明,在节点半刚性的影响下,预压装配式PC框架梁端弯矩有所降低,较按节点刚接计算,框架受力更接近于实际状态,与试验值吻合较好。
Considering the effect of the semi-rigid joints,this paper makes the internal force analysis model of the prestressed precast concrete(PC)frame under a vertical load.We simulate the semi-rigid joint connection in the form of the helical spring to develop the beam element stiffness matrix due to different relative rotation stiffness of the joints at beam ends,and then,make a loaded analysis of the testing frame.The research indicates that the beam ends of the prestressed PC frame have a somewhat lower moment under the influence of the semi-rigid joints.Compared with the simulation of rigid joints,the beam end moment is more approximate to the actual state and experimental results.
Considering the effect of the semi-rigid joints,this paper makes the internal force analysis model of the prestressed precast concrete(PC)frame under a vertical load.We simulate the semi-rigid joint connection in the form of the helical spring to develop the beam element stiffness matrix due to different relative rotation stiffness of the joints at beam ends,and then,make a loaded analysis of the testing frame.The research indicates that the beam ends of the prestressed PC frame have a somewhat lower moment under the influence of the semi-rigid joints.Compared with the simulation of rigid joints,the beam end moment is more approximate to the actual state and experimental results.
引文
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[8]Wong Y L,Yu T,Chan S L.A simplified analytical method for unbraced composite frames with semi-rigid connections[J].Journal of Construction-al Steel Research,2007,63(7):961-969.
[9]侯颖,霍达,滕海文,等.半刚性节点钢框架系统的强度可靠性分析[J].北京工业大学学报,2010,36(11):1477-1481.HOU Ying,HUO Da,TENG Haiwen,et al.Analysis of strength reliability of semi-rigid steel frame[J].Journal of Beijing University of Technology,2010,36(11):1477-1481.(in Chinese)
[2]柳炳康,田井峰,张瑜中,等.低周反复荷载下预压装配式PC框架延性性能和耗能能力[J].建筑结构学报,2007,28(3):74-81.LIU Bingkang,TIAN Jingfeng,ZHANG Yuzhong,et al.Behavior of ductility and energy dissipation of prestressed precast concrete frame under low-cyclic reversed loading[J].Journal of Building Structures,2007,28(3):74-81.(in Chinese)
[3]柳炳康,宋满荣,蒋亚琼,等.预制预应力混凝土装配整体式框架抗震性能实验研究[J].建筑结构学报,2011,32(2):24-32.LIU Bingkang,SONG Manrong,JIANG Yaqiong,et al.Experimental study on seismic performance of post-tensioned precast prestressed concreteframe[J].Journal of Building Structures,2011,32(2):24-32.(in Chinese)
[4]蔡建国,冯健,王蜂岚,等.考虑节点刚度的预制混凝土框架结构分析[J].东南大学学报:自然科学版,2009,39(5):1054-1058.CAI Jianguo,FENG Jian,WANG Fenglan,et al.Structural analysis of precast concrete frames considering joint stiffness[J].Journal of Southeast U-niversity:Natural Science,2009,39(5):1054-1058.(in Chinese)
[5]陆铁坚,吴继亮,张建军.半刚性连接钢框架内力及侧移的近似计算[J].铁道科学与工程学报,2008,5(3):1-5.LU Tiejian,WU Jiliang,ZHANG Jianjun.Approximate calculation of internal force and sway of the semi-rigid jointed steel frame[J].Journal ofRailway And Engineering,2008,5(3):1-5.(in Chinese)
[6]王燕,李华军,厉见芬.半刚性梁柱节点连接的初始刚度和结构内力分析[J].工程力学.2003,20(6):65-69.WANG Yan,LI Huajun,LI Jianfen.Initial stiffness of semi-rigid beam-to-column connections and structural internal force analysis[J].Engineer-ing Mechanics,2003,20(6):65-69.(in Chinese)
[7]柳炳康,黄慎江,宋满荣,等.预制预应力混凝土装配整体式框架拟动力实验研究[J].地震工程与工程振动,2010,30(5):65-71.LIU Bingkang,HUANG shenjiang,SONG Manrong,et al.Pseudo-dynamic research on post-tensioned precast prestressed concrete frame[J].Jour-nal of Earthquake Engineering and Engineering Vibration,2010,30(5):65-71.(in Chinese)
[8]Wong Y L,Yu T,Chan S L.A simplified analytical method for unbraced composite frames with semi-rigid connections[J].Journal of Construction-al Steel Research,2007,63(7):961-969.
[9]侯颖,霍达,滕海文,等.半刚性节点钢框架系统的强度可靠性分析[J].北京工业大学学报,2010,36(11):1477-1481.HOU Ying,HUO Da,TENG Haiwen,et al.Analysis of strength reliability of semi-rigid steel frame[J].Journal of Beijing University of Technology,2010,36(11):1477-1481.(in Chinese)
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