曲线连续梁桥的地震响应分析
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摘要
根据曲线梁桥常见的结构形式,基于ANSYS建立了四种不同的三维有限元计算模型,每种模型都对应曲率半径从100m到无穷大(直线)10种情况,计算研究了曲线梁桥的地震响应规律。分析了曲率半径的变化对曲线梁桥自振特性的影响,曲率及不同支座类型对曲线梁桥地震响应的变化关系,从中得出一些有价值的结论。
Based on common curved beam bridge,four models of 3-D finite element with ANSYS are set up to analyze seismic response laws.Each model's radius varies from 100 meters to infinite.The emphasis is as follows: modal response of different curvature bridge;the relationship between the variety of the curvature and the seismic response of the bridge,the relationship between the variety of the isolation bearing and the seismic response of the bridge.Based on the analysis,some valuable conclusions are acquired.
Based on common curved beam bridge,four models of 3-D finite element with ANSYS are set up to analyze seismic response laws.Each model's radius varies from 100 meters to infinite.The emphasis is as follows: modal response of different curvature bridge;the relationship between the variety of the curvature and the seismic response of the bridge,the relationship between the variety of the isolation bearing and the seismic response of the bridge.Based on the analysis,some valuable conclusions are acquired.
引文
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[2]JTJ004-89公路工程抗震设计规范[S].
[3]朱东生.桥梁抗震设计中几个问题的研究[D].成都:西南交通大学,1999.
[4]GB50011-2001建筑抗震设计规范[S].
[5]Wilson E L,Button M R.Three-Dimensional Dy-namic Analysis for Multicomponent Earthquake Spec-tra[C]//EESD.1982.
[6]冯云田,李明瑞,林春哲.复杂结构的弹性地震反应分析[J].地震工程与工程振动,1991,(4).
[7]张俊杰,林锦道,胡世德.反应谱法确定地震动最不利输入方向[J].世界地震工程,1999,(4).
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