地震对斜交桥墩稳定性影响的有限元分析
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摘要
以常见跨径简支斜交桥为例建立有限元模型,以新型摩擦摆系统支座、板式橡胶支座、抗震型橡胶支座和铰接支承连接为支座形式,通过有限元的方法,以斜度为常变参数,对以上4种支座的刚度和形式进行计算分析,进行常遇地震与罕遇地震下的反应谱和线性时程分析,算出桥墩内力并进行参数分析,对比研究地震对不同支座形式和刚度的斜交桥墩的影响。为正确进行斜交桥的抗震设计提供了有益参考。
This paper takes common simply supported skew bridges with span as examples to build finite element models.Taking the new friction pendulum system bearing,laminated rubber bearing,seismic rubber bearing and joint bearing connection as bearing forms and obliquity as the changing parameter,through the method of finite element,this paper changes the rigidity and forms of the above four bearings and analyzes the response spectrum and linear time interval under ordinary earthquakes and severe ones respectively.Thus,this paper obtains the internal force of piers,carries out the parameter analysis and makes a comparison between the different effect of earthquakes on skew piers with different bearing forms and rigidity,which provides reference for the seismic design of skew bridges.
This paper takes common simply supported skew bridges with span as examples to build finite element models.Taking the new friction pendulum system bearing,laminated rubber bearing,seismic rubber bearing and joint bearing connection as bearing forms and obliquity as the changing parameter,through the method of finite element,this paper changes the rigidity and forms of the above four bearings and analyzes the response spectrum and linear time interval under ordinary earthquakes and severe ones respectively.Thus,this paper obtains the internal force of piers,carries out the parameter analysis and makes a comparison between the different effect of earthquakes on skew piers with different bearing forms and rigidity,which provides reference for the seismic design of skew bridges.
引文
[1]Maleki S.Effect of Diaphragms on Seismic Response of SkewedBridges[C]//Proceedings of The 1stMITConference on Computa-tional Fluid&Solid Mechanics,Elsevier Science,2001.
[2]姜浩,郭学东,门广鑫.重力式U型斜交桥台的开裂与加固的非线性有限元模拟分析[J].吉林建筑工程学院学报,2008,25(3):13-16.
[3]林瑞良.支座对斜交桥桥墩抗震性能的影响[J].福建建设科技,2005(2):28-30.
[4]罗浩,郭向荣.多跨斜交简支T梁桥车桥耦合振动分析[J].中国铁道科学,2009,30(4):36-40.
[5]王永生,赵晖.斜交桥桥面板的有限元分析[J].中外建筑,2004(3):138-140.
[6]张元海.斜交角度对单跨超静定曲梁内力的影响[J].城市道桥与防洪,2008(12):24-26.
[7]孙国荣,刘炎海,孙理想.连续斜交箱梁式桥梁静动载试验研究[J].山西建筑,2007,33(34):13-14.
[2]姜浩,郭学东,门广鑫.重力式U型斜交桥台的开裂与加固的非线性有限元模拟分析[J].吉林建筑工程学院学报,2008,25(3):13-16.
[3]林瑞良.支座对斜交桥桥墩抗震性能的影响[J].福建建设科技,2005(2):28-30.
[4]罗浩,郭向荣.多跨斜交简支T梁桥车桥耦合振动分析[J].中国铁道科学,2009,30(4):36-40.
[5]王永生,赵晖.斜交桥桥面板的有限元分析[J].中外建筑,2004(3):138-140.
[6]张元海.斜交角度对单跨超静定曲梁内力的影响[J].城市道桥与防洪,2008(12):24-26.
[7]孙国荣,刘炎海,孙理想.连续斜交箱梁式桥梁静动载试验研究[J].山西建筑,2007,33(34):13-14.
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