汶川地震简支梁桥桥墩及主梁震害机理分析
发布时间：2018-07-24 08:48
【摘要】：桥梁震害机理研究是将震害调查结果转化为实用技术的重要技术环节,汶川地震中简支梁桥表现出一些区别于其他地震的特点。采用数值模拟结合振动台试验的方法,揭示了桥墩震害和主梁震害的形成机理。结果表明,主梁与支座间的相对滑动释放了主梁的地震作用是汶川地震中桥墩震害少的主要原因;桥面连续协调了主梁位移,桥台约束了主梁的纵向位移是汶川地震中落梁少的主要原因。简支梁桥的主梁、桥墩、支座、桥台、桥面连续构成了一个完整的抗震系统,在释放主梁地震作用的同时,减小了落梁风险。
[Abstract]:The study of bridge damage mechanism is an important technical link to transform the seismic damage investigation results into practical technology. In Wenchuan earthquake, simply supported beam bridges show some characteristics different from other earthquakes. By means of numerical simulation and shaking table test, the formation mechanism of seismic damage of pier and main beam is revealed. The results show that the relative sliding between the main beam and the support releases the earthquake action of the main beam is the main reason for the less damage caused by the bridge pier in the Wenchuan earthquake, and the bridge deck continuously coordinates the displacement of the main beam. The longitudinal displacement of the main beam restrained by abutment is the main reason for less falling beam in Wenchuan earthquake. The main beam, pier, support, abutment and deck of the simply supported beam bridge constitute a complete seismic system continuously, which reduces the risk of falling beam while releasing the seismic action of the main beam.
【作者单位】： 中交公路规划设计院有限公司;
【基金】：交通运输部西部交通建设科技项目(2009 318 000 096)
【分类号】：U443.22;U442.55
[Abstract]:The study of bridge damage mechanism is an important technical link to transform the seismic damage investigation results into practical technology. In Wenchuan earthquake, simply supported beam bridges show some characteristics different from other earthquakes. By means of numerical simulation and shaking table test, the formation mechanism of seismic damage of pier and main beam is revealed. The results show that the relative sliding between the main beam and the support releases the earthquake action of the main beam is the main reason for the less damage caused by the bridge pier in the Wenchuan earthquake, and the bridge deck continuously coordinates the displacement of the main beam. The longitudinal displacement of the main beam restrained by abutment is the main reason for less falling beam in Wenchuan earthquake. The main beam, pier, support, abutment and deck of the simply supported beam bridge constitute a complete seismic system continuously, which reduces the risk of falling beam while releasing the seismic action of the main beam.
【作者单位】： 中交公路规划设计院有限公司;
【基金】：交通运输部西部交通建设科技项目(2009 318 000 096)
【分类号】：U443.22;U442.55
【参考文献】
相关期刊论文 前6条
1 范立础;李建中;;汶川桥梁震害分析与抗震设计对策[J];公路;2009年05期
2 李曙平;曾超;阳先全;王建国;;“5·12”汶川地震桥梁震害浅析[J];公路;2009年07期
3 李鸿晶;陆鸣;温增平;罗韧;;汶川地震桥梁震害的特征[J];南京工业大学学报(自然科学版);2009年01期
4 刘健新;赵国辉;;“5·12”汶川地震典型桥梁震害分析[J];建筑科学与工程学报;2009年02期
5 庄卫林;刘振宇;蒋劲松;;汶川大地震公路桥梁震害分析及对策[J];岩石力学与工程学报;2009年07期
6 高玉峰;李晓斌;杨永清;;桥梁结构地震碰撞问题理论分析模型及试验研究进展[J];应用力学学报;2010年04期
【共引文献】
相关期刊论文 前10条
1 张鑫r，
本文编号：2140848
本文链接：https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/2140848.html
