城市桥梁地震反应中防碰撞措施分析

在地震过程中城市桥梁上部相邻结构的碰撞,不仅使结构受损,甚至发生倒塌,这是地震工程研究领域一个关键而又难以解决的问题。给出各国规范对于落梁防止装置的规定,通过对工程实践中常采用的防碰撞措施进行分析,改进了常用的拉杆装置、落梁防止装置的设计方法,给出了简化的计算方法,可以更好的应用到工程实践中。

POUNDING EFFECTS IN ELEVATED BRIDGES DURING EARTHQUAKES

Pounding of adjacent superstructure segments in elevated bridges during severe earthquake can result in significant structural damage.The influence of pounding on the structural response is significant in the longitudinal direction of the bridge and significantly depends on the gap size between superstructure segments.In the study,the Code for seismic design of buildings are compared and analyzed,the method for decreasing pounding response are analyzed,the design method for preventing the pounding response are amended,the result can be applied in the bridge design well.