| 无桥台伸缩缝多联桥跨结构地震碰撞响应研究 |
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| 引用本文： | 王天利,李青宁.无桥台伸缩缝多联桥跨结构地震碰撞响应研究[J].土木工程学报,2011(Z1):109-113,134. |
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| 作者姓名： | 王天利 李青宁 |
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| 作者单位： | 西安建筑科技大学; |
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| 基金项目： | 国家自然科学基金(51078306); 高等学校博士学科点专项科研基金(20106120110004); 陕西省重点学科建设专项资金(E01004); 西安建筑科技大学重大科技创新基金(ZX0901) |
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| 摘 要： | 针对地震作用下多联长桥结构中伸缩缝处的碰撞破坏,提出一种取消桥台伸缩缝保留两联间桥墩伸缩缝的新型多联桥跨结构。用Kelvin接触单元模拟桥台伸缩缝和桥墩两联间伸缩缝在地震作用下的碰撞效应,构建包括墩柱、主梁、支座和伸缩缝在内的全桥空间动力分析模型。依托某市立交体系中一座独立多联长曲线匝道桥梁工程,建立4个计算模型;分别输入2组地震波的单维和多维8种地震动工况;利用非线性时程分析法,研究各计算模型在多种地震输入工况下桥台伸缩缝和桥墩两联间伸缩缝的碰撞响应差异。结果表明:无桥台伸缩缝多联桥跨结构可以有效消除或减小地震荷载作用下桥跨结构中伸缩缝处的碰撞破坏,是一种十分有利的抗震结构形式。
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| 关 键 词： | 多联桥跨结构 伸缩缝 全桥空间模型 地震输入工况 时程分析法 地震碰撞响应 |
Research on seismic pounding response of multi-unit bridge without abutment expansion joint |
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| Wang Tianli Li Qingning.Research on seismic pounding response of multi-unit bridge without abutment expansion joint[J].China Civil Engineering Journal,2011(Z1):109-113,134. |
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| Authors: | Wang Tianli Li Qingning |
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| Affiliation: | Wang Tianli Li Qingning(Xi'an University of Architecture & Technology,Xi'an 710055,China) |
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| Abstract: | Aiming at pounding damage at expansion joint in a multi-unit(where one continuous girder is defined as one unit) long bridge under earthquake,a new multi-unit bridge structure without abutment expansion joint was proposed.With the Kelvin contact element simulating the pounding response of expansion joints,space dynamic model of the full-bridge was constructed,including pier,beam,bearing and expansion joint.Based on a single multi-unit curved ramp bridge in the interchange in practice,four full-bridge models... |
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| Keywords: | multi-unit bridge expansion joint full-bridge space model earthquake input conditions time history analysis method seismic pounding response |
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