摘要
开发了一种新型减隔震支座-拉索减震支座.拉索减震支座由聚四氟乙烯滑移装置隔震,拉索限制过大位移,并提供恢复力,讨论了其设计参数.采用拟静力试验测定了不锈钢板与聚四氟乙烯滑板之间的摩擦系数及支座在不同竖向压力下的滞回性能,获得了相关参数,为支座理论模型的建立提供基础.以一个四跨连续梁桥为实例,对拉索减震支座的有效性以及拉索刚度的合理取值进行了分析.分析结果表明,拉索减震支座能够显著地减小固定墩所受的地震力,同时拉索限位能力强,能够有效防止落梁.
A new aseismic bearing-cable-sliding friction aseismic bearing was developed.The polytetrafluoroethylene（PTFE） plate was used as a sliding friction device and the cable was used for limiting the displacement as well as providing a restoration force.Furthermore,the design parameters for the bearing were discussed.The friction coefficient between the stainless steel plate and PTFE plate along with hysteretic behavior under various vertical loads were tested by pseudo-static experiments,and the necessary parameters for creating a theoretical model of the bearing were obtained.The effectiveness of the bearing and the reasonable value of cable stiffness were analyzed in the presented example,which is a four-span continuous girder bridge.The result shows that the cable-sliding friction aseismic bearing can decrease the earthquake force of the fixed pier significantly.Moreover,the cable can limit the displacement efficiently and prevent the girder from falling.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2010年第12期1593-1600,共8页
Journal of Harbin Engineering University
基金
国家自然科学基金资助项目(50778131
50978194
90915011)
关键词
桥梁
拉索减震支座
盆式支座
限位
落梁
bridge
cable-sliding friction aseismic bearing
pot bearing
displacement limitation
girder falling
