Influence of earthquake input angle on seismic response of curved girder bridge
Influence of earthquake input angle on seismic response of curved girder bridge
复制标题
地震输入角对曲线梁桥地震反应的影响
DOI：
10.1016/j.jtte.2015.05.003
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发表时间：
2015-08
期刊：
影响因子：
--
通讯作者：
江辉
中科院分区：
文献类型：
--
作者：
倪永军;陈佳宇;腾化梁;江辉
曲线桥的最大地震反应与指定地震输入角有显著的关系。由于结构的不规则性，桥梁反力是由弯矩和扭矩相互作用产生的。在求解单向地震输入下结构地震反应的基础上，推导了地震输入不利角的统一表达式，并确定了相应的结构最大反应。考虑正交各向异性和斜交双向地震输入方式，分别推导了两种情况下的最不利角度。以一弯梁桥为例，建立了考虑曲率半径变化和支座布置的多分量地震反应有限元模型，并进行了多分量地震反应分析。采用反应谱法对不同输入角度下的地震反应进行了计算分析。地震动输入角逐渐增大。通过对上述计算结果的分析比较，可以确定曲线桥最大地震反应所对应的最不利地震激励角。结果表明，不同反应组合方法得到的地震输入最不利角度基本一致。
The maximum seismic response of curved bridge is significantly related to the input angle of designated earthquake. Owing to structure irregularities, bridge reactions result from the interaction between the moment and torsion forces. Based on the solving of the seismic response of structure excited by a one-way earthquake input, a uniform expression of the unfavorable angle of the earthquake input was derived, and the corresponding maximum response of structure was determined. Considering the orthotropic and skewed dual-directional earthquake input manners, the most unfavorable angles for the two cases were also derived, respectively. Furthermore, a series finite element models were built to analyze the multi-component seismic responses by examining an example of curved girder bridge considering the variation of curvature radius and the bearings arrangement. The seismic responses of the case bridges, were excited by earthquakes at different input angles, and were calculated and analyzed using a response spectrum method. The input angles of earthquake excitation were progressively increased. From the analysis and comparison based on the calculation results mentioned above, the most unfavorable angle of earthquake excitation corresponding to the maximum seismic response of the curved bridge could be determined. It was shown that the most unfavorable angles of earthquake input resulted from the different response combination methods were essentially coherent.
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DOI：
--
发表时间：
2002
期刊：
China Journal of Highway and Transport
影响因子：
--
作者：
D. Zhu;Szu-Cheng Liu;L.S. Yu
通讯作者：
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影响因子：
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DOI：
--
发表时间：
2004
期刊：
Journal of Tongji University
影响因子：
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Nie Li-ying;L. Jian-zhong
DOI：
--
发表时间：
2012
期刊：
--
影响因子：
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作者：
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通讯作者：
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影响因子：
4.5
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K. Kawashima;J. Penzien