组合隔震支座在大跨度连廊结构中的应用

APLICATION OF COMBINED ISOLATOR IN LONG-SPAN PLATFORM BRIDGE STRUCTURE

以一连廊结构体系为研究对象,采用组合支座连接大跨度连廊和底部结构,实现释放温度应力和减小结构地震反应的目的。介绍了这种高位隔震方法的特点和减震原理,优化设计了隔震支座并分析了其特性,利用ANSYS程序对整体结构进行了非线性地震反应分析,最后对比分析了该隔震结构减震效果。结果表明,该连廊结构采用组合隔震支座后,不仅可以释放温度应力,而且可以显著减小结构地震反应。该方法可供连廊式结构隔震设计参考。

Taking a platform bridge structure as the research object,temperature-induced force is released and seismic response reduced by means of installing a combined isolator between the lower towers and the upper long-span steel truss.The characteristics and principles of the highposition shock isolation are introduced,then the combined isolator is designed and its characteristics described.Afterwards,nonlinear seismic response analysis of the combined structure,with or without isolation,is performed using ANSYS program.The analysis results show that the seismic isolator can release the environmental temperature-induced force and significantly mitigate the seismic responses of the structure.The isolation technique can be the reference to similar projects in the future.