叠层橡胶支座串联隔震体系抗火性能研究  

A Study on Fire Resistant Property of Serially Isolated System of Laminated Rubber Bearing and RC Column

作　　者：杜永峰[1,2] 李慧[2] 窛巍巍[1] 窛佳亮[1] 

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《灾害学》2010年第B10期207-211,共5页Journal of Catastrophology

基　　金：国家自然科学基金(50778087);甘肃省科技支撑计划(090-GKCA040)

摘　　要：对叠层橡胶隔震支座在高温作用下的温度场进行数值模拟,利用小模型试件进行温度传导及温度场分布试验。在叠层橡胶隔震支座经历420℃的高温作用后,将隔震支座模型试件与钢筋混凝土柱串联,并对串联隔震体系的力学性能进行压剪往复试验。结果表明,叠层橡胶隔震支座在高温作用下的性能退化相当明显,承载状态下的橡胶隔震支座在稍高的温度作用下就开始发生畸变。这表明在实际工程中对叠层橡胶隔震支座采取防火保护措施对保证隔震结构承载力安全非常重要。This paper presents a numerical analysis of the temperature field of laminated rubber bearing under high-temperature.A heat transfer and temperature field distribution test is performed using a small-scale model rubber bearing.After experiencing a high-temperature of 420℃,the laminated rubber bearing was serially connected on top of RC column,and the serially isolated system is cyclically tested subjected to compression and shear.The result shows that the mechanical performance of laminated rubber bearing under high-temperature degraded seriously,and severe distortion may occur in the loaded rubber bearing when subjected to a relatively high-temperature.A protection measure of rubber bearing against fire seems to be essential for maintaining the load bearing capacity of the bearing in practical engineering.

关 键 词：火灾性能 隔震 串联隔震 温度场 

分 类 号：U443.361[建筑科学—桥梁与隧道工程]