摘要
隔震橡胶支座的耐火性能通常较差,威胁着隔震结构(特别是层间隔震结构)的火灾安全。在ISO 834标准升温条件下,通过2个采用厚型防火涂料的隔震橡胶支座的明火试验,对比分析了隔震橡胶支座在火灾前、后的力学性能。利用ANSYS软件,分析了试验支座的内部温度场,并与实测结果进行了对比。研究结果表明:对于采用厚度50mm的防火涂料和相应构造措施进行保护处理的隔震橡胶支座,在持续3h的明火试验后,无铅芯橡胶支座和铅芯橡胶支座的表观特征均无明显变化,各项力学性能指标与受火前相比变化幅度均小于8%,水平极限变形能力满足现行规范要求;验证了隔震橡胶支座防火保护措施的有效性。
Fire resistant capacity of rubber isolation bearings is usually poor,resulting in a poor fire safety of isolation structures（especially story-isolation structures）.Two fire-protected rubber isolation bearings were tested under ISO 834 standard heating process.Experiments aiming to compare the mechanical properties of the bearings before and after fire test were conducted.Thermal fields of the specimens were analyzed using the computer program ANSYS,and compared with the measured results.Test results indicate that after 3 hours of fire,the specimens with fire insulation of 50mm thick do not show any visible changes in their appearance.The degradation of their mechanical properties do not exceed 8%.And their lateral ultimate deformation capacities comply with the requirements specified in the Chinese codes.It is demonstrated that the insulation measures proposed in this paper is suitable for fire protection of rubber isolation bearings.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2011年第2期107-112,共6页
Journal of Building Structures
基金
国家科技支撑计划子课题项目(2006BAJ03A03-12)
国家自然科学基金项目(90815027
51025829)
亚热带建筑科学国家重点实验室重点研究项目(2008ZA10)
关键词
隔震橡胶支座
防火保护
受火试验
受火性能
rubber isolation bearing
fire protection
fire test
fire performance
