摘要
隔震结构两阶段设计法包括简化估算和时程分析。简化估算阶段用于隔震方案的初步确定,将上部结构简化为单质点体系,估算结构的自重和自振周期,再通过预期的减震目标及反应谱,推算隔震后结构的周期,并据此得到隔震层刚度,从而初步选定隔震支座的数量。时程分析阶段用于施工图设计,最终确定和优化隔震支座的布置和参数。文中作者基于旧《抗规》已将其实现。新《抗规》对隔震支座刚度取值和安全储备系数作出了新的规定,文中也将上述方法进行了相应调整。
Two-stage design method for base isolation structures includes simplified estimation and time history analysis. Simplified estimation is used in preliminary design stage, for estimating the weight and the first period of an isolated structure, the upper structure is simplified as a SDOF system. According to the expected response reduction goals and response ture, stiffness of isolation device and number of isolation spectrum, the first period of the isolated strucbearing can be induced. Time history analysis is employed in detail design stage, for determination and optimization of isolation device based on current standards. The author has made it realized based on the old Seismic Code. As there are some changes of provision on base isolation analysis in new code, including the value of bearing stiffness and safety factor, etc. , the method mentioned above should be updated.
出处
《低温建筑技术》
2013年第1期82-84,共3页
Low Temperature Architecture Technology
关键词
隔震设计
两阶段设计法
水平向减震系数
base isolation design
two-stage design method
horizontal earthquake reduction coefficient
