| 近场地震作用下高速铁路简支梁桥的碰撞行为 |
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| 引用本文： | 孟宪锋,朱晞.近场地震作用下高速铁路简支梁桥的碰撞行为[J].北京交通大学学报(自然科学版),2006,30(4):73-76. |
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| 作者姓名： | 孟宪锋 朱晞 |
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| 作者单位： | 北京交通大学,土木建筑工程学院,北京,100044;北京交通大学,土木建筑工程学院,北京,100044 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 近场地面运动有显著的改变结构响应的特点,使结构产生较大的内力和位移,高速铁路简支梁桥与普通铁路简支梁一样存在着梁缝,在近场地震作用下由于相邻两跨梁之间或是梁与桥台之间运动的不协调导致发生碰撞,这种碰撞现象可能会造成梁体的脱落.本文研究了碰撞现象对桥梁结构产生的不利影响,认为对固定铰支座的影响很大,在支座设计时应该给予重视.
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| 关 键 词： | 近场地震 简支梁 碰撞 固定支座 |
| 文章编号： | 1673-0291(2006)04-0073-04 |
| 收稿时间： | 2005-01-13 |
| 修稿时间： | 2006-06-05 |
Pounding Behavior of High-Speed Railway Simple Supported Bridges Under the Near-Fault Earthquakes |
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| MENG Xian-feng,ZHU Xi.Pounding Behavior of High-Speed Railway Simple Supported Bridges Under the Near-Fault Earthquakes[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2006,30(4):73-76. |
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| Authors: | MENG Xian-feng ZHU Xi |
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| Institution: | School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | The neat-fault ground motion can dramatically influence response characteristic of the structures. And it can increase the internal force and the displacement of the structures. Because high-speed railway simple supported beam bridges also have the expansion joints as general simple supported beam bridges, the pounding will happen between adjacent beams or beams and abutment. And the pounding can cause beams falling. In this paper, the effect caused by pounding to the bridges was studied. The conclusion was draw that the pounding between two decks have heavy influence on the fixed pin bearings. This fact had not been noticed for a long time in the bridges designing. |
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| Keywords: | near-fault earthquake simple supported bridge pounding fixed pin bearing |
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