新型减震防落梁支座性能分析  

Performance analysis of a new type of anti-drop-beam seismic bearing

作　　者：韩笑枫 刘猛[2] Han Xiaofeng;Liu Meng(Beijing Capital Highway Development Co.,Ltd.,Beijing 100071,China;Tongji University,Shanghai 200092,China)

机构地区：[1]北京市首发高速公路建设管理有限责任公司,北京100071 [2]同济大学,上海200092

出　　处：《山西建筑》2023年第4期161-164,共4页Shanxi Architecture

摘　　要：为提升中小桥梁的抗震性能,研发了一种新型减震防落梁支座,该装置不仅起到防落梁的作用,还兼具减震和保护支座的功能。首先对新型支座进行了理论分析,得出其力学模型,并给出设计原则,最后进行了实例分析,利用Midas civil进行地震动时程分析,考虑不同地震动和墩柱塑性铰的影响,对新型支座的抗震性能进行了详细分析。分析结果表明,新型支座具有良好的耗能作用,且在大震下有一定的限位作用,保护支座,防止落梁。In order to improve the seismic performance of small and medium bridges, a new type of anti-drop-beam seismic bearing was developed. The devices not only play the role of anti-drop-beam, but also have the function of shock absorber and protection bearings. Firstly, theoretical analyse of the new type of bearing was carried out, and the mechanical model was obtained, and the design principle was given. Finaly, an example is analyzed, the time history analyse of earthquake motion was carried out by Midas civil. Considering the influence of different earthquake motions and plastic hinges of piers, the seismic performances of the anti-drop-beam seismic bearing were analyzed in detail. The analysis results show that the new bearing has good energy dissipation effect and has a certain limit effect under large earthquake, so as to protect the bearing and prevent the beam from falling.

关 键 词：桥梁工程 防落梁装置 减震防落梁支座 时程分析 

分 类 号：TU997[建筑科学—市政工程]