介绍了中国《建筑隔震设计标准》(GB/T 51408-2021)(以下简称《隔标》)和美国Minimum design loads and associated criteria for buildings and other structures(ASCE 7-16)隔震设计的相关要求,并针对基于《建筑抗震设计规范》(GB 50011-2010)(2016 年版)(以下简称《抗规》)设计的某 9 度区近场隔震结构,进行了两国规范的设计对比.按《抗规》设计的隔震结构,仍然能满足《隔标》的设计要求.ASCE 7-16 对于隔震支座考虑了老化和环境、测试、制造等因素引起的性能参数变化,并按隔震支座的上限及下限属性进行了结构设计.基于相同地震概率水准(50 年超越概率 2%)的设计对比研究表明,ASCE 7-16 的等效侧力法计算值高于《隔标》,按ASCE 7-16要求选择的地震波反应谱明显高于《隔标》,其时程分析结果也大于中国规范,对隔震支座的性能要求更高.
A comparative study of Chinese and American seismic isolation design based on time-history method
This paper introduced the relevant requirements of Standard for seismic isolation design of building(GB/T 51408-2021)(short for the isolation standard)in China and Minimum design loads and associated criteria for buildings and other structures(ASCE 7-16)in American for seismic isolation design.Based on a near-field isolated structure in the seismic intensity zone of 9 in China,the design specifications of the two countries were compared.The isolation structure designed according to Code for seismic design of buildings(GB 50011-2010)(2016 edition)(short for the seismic standard)could still meet the design requirements of the isolation standard.ASCE 7-16 considered performance changes of the seismic isolation bearing due to the factors such as aging and environment,testing,manufacturing and so on.Design of the structure should both consider the upper and lower limit properties of the seismic isolation bearing.Based on the design comparison study at the same seismic probability level(exceedance probability 2%in 50 years),the calculated values of the equivalent lateral force method in ASCE 7-16 are higher than those in the isolation standard.The response spectrums of seismic records selected according to ASCE 7-16 requirements are significantly higher than those according to Chinese code,and the time-history analysis result is higher than that of the Chinese standard with a higher performance requirement of the seismic isolation bearing.
seismic isolation designupper and lower limit propertiestime-history methodequivalent lateral force method
NETL
NSTL
万方数据
维普
