摘要
本文利用日本KIK-NET台网85个台站242组强震记录,按照我国2001抗震规范进行场地分类,分别计算每个场地地下基岩与地表阻尼比为5%的加速度反应谱,并按照地下基岩输入地震动PGA的大小分为四个区间,研究每个区间场地条件对地表加速度反应谱的影响:Ⅱ类场地在短周期对地震动的放大作用最大,Ⅲ类场地次之,Ⅰ类场地最小。结果表明反应谱最大值应随场地类别进行调整,最后给出了不同类别场地设计反应谱最大值的场地系数建议值。
With the 242 group strong earthquake records of 85 stations at KIK-NET in Japan,the sites was classified as 01 seismic code,the acceleration response spectrum with 5% damping ratio of underground bedrock and surface at each site were calculated,and according to the size of the input ground motion of underground bedrock PGA was divided into four intervals.This article studied the effect of site condition on surface acceleration response spectrum at each site,and concluded Class Ⅱsite with the largest ground motion amplification in short period,ClassⅠwith the least,after Class Ⅲ site.The result shows the maximum response spectrum adjusted by site classification,proposes the maximum value of site coefficient of various sites design response spectrum.
出处
《土木工程与管理学报》
2011年第1期69-72,共4页
Journal of Civil Engineering and Management
关键词
场地分类
地震动
设计反应谱
场地系数
site classification
seismic
design response spectrum
site coefficient
