高墩桥梁减隔震设计的一种新思路—新型高墩隔断结构体系  

A New Thinking on Seismic Isolation Design of Bridges with High Piers: High-Pier-Partitioned Structure System

作　　者：刘世佳[1] 田圣泽 袁万城[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2015年第3期82-87,共6页Structural Engineers

基　　金：国家自然科学基金资助项目(51478339;51278376);土木工程防灾国家重点实验室基金资助项目SLDRCE14-B-14

摘　　要：科学研究和震害经验表明,减隔震技术可以有效提高桥梁结构的抗震能力,并且具有避免结构构件损伤、震后易修复等诸多优点,但减隔震装置性能发挥受限的高墩桥梁通常采用延性设计的抗震设计方法。通过对高墩桥梁采用减隔震技术的探讨,提出了一种将高墩在选定高度隔断、在隔断处设置支座的新型高墩隔断结构体系,并数值建模分析了其减隔震效果。结果表明,新型高墩隔断结构体系在支座滞回耗能和结构的地震响应方面,均比常规高墩减隔震体系的抗震效果优异。新型高墩隔断结构体系为高墩桥梁抗震设计采用减隔震技术提供了新的思路,拓展了减隔震技术的应用范围。The scientific researches and seismic damages suggest that the use of seismic isolation technology in a bridge can profoundly raise the aseismic ability of the bridge, and it has several advantages such as avoiding damages of structure and an easy repair after an earthquake. Nowadays, ductility seismic design is considered to be used in the realm of bridge with high piers where the performance of seismic isolation devices is limited. According to discussing the seismic isolation design in bridges with high piers, a new seismic structure system called High-Pier-Partitioned Structure System （HPPSS） is presented, which partitions high piers and puts isolation bearings in the partitioned section. A numerical analysis shows that HPPSS has a better performance than conventional system in the hysteresis energy dissipation of bearings as well as the reaction of the whole structure. HPPSS is a new thinking on using seismic isolation design in bridges with high piers and expands the realm of seismic isolation design in bridge engineering.

关 键 词：减隔震技术 高墩桥梁 高墩隔断结构体系 滞回耗能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]