| 基于DOM法的曲线连续梁桥地震响应分析 |
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| 引用本文： | 李喜梅,杜永峰.基于DOM法的曲线连续梁桥地震响应分析[J].北京理工大学学报,2012(S1):25-29. |
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| 作者姓名： | 李喜梅 杜永峰 |
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| 作者单位： | 兰州理工大学 西部土木工程防灾减灾教育部工程研究中心, 甘肃, 兰州 730050;兰州理工大学 防震减灾研究所, 甘肃, 兰州 730050;兰州理工大学 西部土木工程防灾减灾教育部工程研究中心, 甘肃, 兰州 730050;兰州理工大学 防震减灾研究所, 甘肃, 兰州 730050 |
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| 基金项目： | 国家自然科学基金资助项目(0904ZGA064) |
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| 摘 要： | 针对曲线连续梁桥的平面不规则性引起弯扭耦合效应而导致了地震响应的复杂性,本文根据连续曲线梁桥水平地震响应特点,给出了一种考虑Rayleigh阻尼的三自由度简化分析模型,采用微分求积法(DOM)原理,求解非隔震和隔震曲线梁桥在单向地震输入时的动力学方程来研究结构的动力特性和地震动行为. 并结合Matlab编程给出地震波的最不利输入角度. 结果表明此简化模型能很好地反应曲线梁桥的动力特性和地震反应,有助于精细地把握曲线梁桥的抗震安全性.
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| 关 键 词： | 曲线桥 地震输入方向 微分求积法 |
| 收稿时间： | 2012/9/28 0:00:00 |
Seismic Response Analysis of Continuous Curved Girder Bridg Based on the DOM Method |
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| LI Xi-mei and DU Yong-feng.Seismic Response Analysis of Continuous Curved Girder Bridg Based on the DOM Method[J].Journal of Beijing Institute of Technology(Natural Science Edition),2012(S1):25-29. |
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| Authors: | LI Xi-mei and DU Yong-feng |
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| Institution: | Western Engineering Research Center of Disaster Mitigation in Civil Engineering, Lanzhou Univ. of Tech., Lanzhou, Gansu 730050, China;Institute of Earthquake Protection and Disaster Mitigation, Lanzhou Univ. of Tech., Lanzhou, Gansu 730050, China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering, Lanzhou Univ. of Tech., Lanzhou, Gansu 730050, China;Institute of Earthquake Protection and Disaster Mitigation, Lanzhou Univ. of Tech., Lanzhou, Gansu 730050, China |
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| Abstract: | A simplified bridge model suitable for parametric study of curved highway bridges was presented. According to the horizontal seismic response characteristics of continuous curved girder bridges, a simplify model of three degrees of freedom considering the Rayleigh damping was introduced. The principle of the differential quadrature method for the dynamic characteristics of solving non-isolation and isolation curved girder bridges under the excitations of unidirectional seismic wave input was explored. Combined with Matlab programming, the seismic waves in the most unfavorable input angle was proposed. The results showed that the model is able to respond to the dynamic characteristics and seismic response of curved bridges, which might contribute to grasp of the curved bridge seismic safety. |
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| Keywords: | curved bridges earthquake input direction differential quadrature method |
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