| 天津软土场地对地震动参数的影响 |
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| 引用本文： | 张力方,吕悦军,兰景岩.天津软土场地对地震动参数的影响[J].地壳构造与地壳应力文集,2008(0). |
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| 作者姓名： | 张力方 吕悦军 兰景岩 |
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| 作者单位： | 中国地震局地壳应力研究所; |
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| 摘 要： | 天津市区的场地条件为很厚而松软的第四纪沉积物,覆盖层较厚,地貌属海积—冲积平原,对地震动参数的影响很大。本文以海河东岸的天津嘉里中心工程场地为例,通过场地地震动效应分析,研究场地特征对地震动的影响。结果表明,土层地震反应分析得到的地震动峰值和反应谱与GB50011-2001《建筑抗震设计规范》的规定有明显的差别,抗震设计中的根据场地类别调整地震动的方法不足以完全描述场地地震反应特性,也难以反映天津厚软土场地的实际情况。可以认为,对于天津软土场地,采用经场地土层地震动效应分析所得地震动参数更为合理安全。
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| 关 键 词： | 设计反应谱 设计地震动 建筑抗震设计规范 地震动参数 软土场地 土层地震反应分析 粉质黏土 场地土 地震安全性评价 工程场地 |
Effects of soft soil condition in TianJin on ground motion parameters |
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| Authors: | Zhang Lifang Lu Yuejun Lan Jingyan |
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| Institution: | Zhang Lifang Lu Yuejun Lan Jingyan(Institute of Crustal Dynamics,CEA,Beijing,100085) |
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| Abstract: | Local soil condition of Tianjin is featured by thick and soft Quaternary sediment,the overburden is very thick,and the geomorphic element is of marine deposit and alluvial plain.This paper takes the site of JiaLi center located on the east bank of Hai river as an example.The site seismic effect is analyzed and the influence of the soil on the design ground motion parameters is discussed.The results show that: the peak ground acceleration and response spectrum gained from layered soil earthquake analysis is ... |
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