[1]苏　栋,李相崧.饱和砂土场地在小震下的响应(英文)[J].深圳大学学报理工版,2007,24(4):339-344.
　SU Dong and LI Xiang-song.Response of saturated sand ground under small earthquake loading[J].Journal of Shenzhen University Science and Engineering,2007,24(4):339-344.
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饱和砂土场地在小震下的响应(英文)()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第24卷
期数:
2007年4期
页码:
339-344
栏目:
土木建筑工程
出版日期:
2007-10-30

文章信息/Info

Title:
Response of saturated sand ground under small earthquake loading
文章编号:
1000-2618(2007)04-0339-05
作者:
苏　栋1; 李相崧2
1）深圳大学土木工程学院，深圳市土木工程耐久性重点实验室，深圳 518060；
2）香港科技大学土木工程系，香港
Author(s):
SU Dong1 and LI Xiang-song2
1)College of Civil Engineering，Shenzhen Municipal Key Laboratory on Durability of Civil Engineering，Shenzhen University，Shenzhen 518060，P．R．China
2)Department of Civil Engineering，Hong Kong University of Science and Technology，Hong Kong，P.R.China
关键词:
场地响应; 砂土; 超静孔压; 地震; 放大系数; 固有频率
Keywords:
ground response; sand; pore pressure; earthquakes; amplification factor; natural frequencies
分类号:
TV 223.7；TV 441+.4
文献标志码:
A
摘要:
水平场地地震响应分析是岩土地震工程实践中最重要的问题之一．深圳近年多次经历外围地震引起的小振动，因而研究场地在小震作用下的响应有特殊意义．利用香港科技大学离心机及双向振动台，进行饱和砂土场地的动力模型试验．观测模型在原型峰值加速度为0.07 g 的小震作用下，加速度、侧向位移、竖向沉降及超静孔压等方面的响应．发现在地震过程中，土体变形较小，超静孔压比也小于0.5，但超静孔压的变化使场地固有频率靠近输入地震波的频率，加速度的放大系数最大可达到3.67．分析结果表明，小震作用下场地虽不大可能发生液化，但在特定情况下，仍可能对上部结构造成破坏．
Abstract:
Analysis of response of level ground subjected to earthquake is one of the most important problems in geotechnical engineering practice．Since Shenzhen has been subjected to small vibration several times in recent years，the studies on response of level ground under small earthquakes are of particular interest．In this study，a centrifuge dynamic test was performed on a uniform saturated sand ground model under a small earthquake loading with a peak acceleration of about 0.07 g in the prototype scale．Acceleration，lateral displacement，vertical settlement as well as excess pore pressure were measured during the shaking event．It was observed that the deformation of soil body was small，and the excess pore pressure ratios were less than 0.5. However，the input acceleration was amplified by a factor as large as 3.67 at the ground surface. The phenomenon is associated with a shift of the natural frequency of the sand ground induced by the buildup of excess pore pressure during the earthquake．This study indicates that small earthquake may bring detrimental effect to superstructures，although liquefaction is unlikely to occur．

参考文献/References:

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［7］SU Dong．Centrifuge Investigation on Responses of Sand Deposit and Sand-pile System Under Multi-directional Earthquake Loading［D］．Hong Kong：The Hong Kong University of Science and Technology，2005．
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［1］Arulanandan K，Anandarajah A，Abghari A．土体液化的离心机模拟［J］． 岩土工程，1983，109(3)：281-300(英文版)．
［2］Hushmand B，Scott R F，Crouse C B． 使用层状箱的离心机液化试验［J］． 岩土技术，1988，38(2)：253-262(英文版)．
［3］Arulanandan K，Scott R F． 液化分析方法的离心模拟试验验证［M］． 鹿特丹：Balkema出版社，1993(英文版)．
［4］Shen C K，Li X S，Ng C W W，等． 香港土工离心机的研发［C］//Kimura T，Kusakbe O，Takemura J．离心机98．鹿特丹：Balkema出版社，1998：13-18(英文版)．
［5］Whitman R V，Lambe P C，Kutter B L． 利用叠环装置模拟土层的初步结果［C］． 岩土地震工程与土动力学进展国际会议论文集．St Louis MO：［出版者不详］，1981：1105-1110(英文版)．
［6］Taboada V M，Dobry R． RPI 1号模型试验结果 ［C］//Arulanandan K，Scott R F．用于土体液化问题数值程序的验证，1993：3-17(英文版)．
［7］苏　栋．多向地震荷载作用下砂土自由场和桩-砂系统的离心机研究［D］．香港：香港科技大学(英文版)，2005．
［8］Campbell K W． 水平加速度峰值的近源衰减 ［J］． 美国地震协会会刊，1981，71：2039-2070(英文版)．

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备注/Memo

备注/Memo:
收稿日期：2007-05-14；修回日期：2007-07-18
基金项目：国家自然科学基金资助项目(50608051)；广东省自然科学基金资助项目(06301363)；深圳市科技计划资助项目(200523)
作者简介：苏　栋(1978-)，男(汉族)，福建省永定县人，深圳大学副教授、博士．E-mail：sudong@szu.edu.cn
通讯作者：李相崧(1943-)，男(汉族)，香港科技大学教授、博士生导师．E-mail：xsli@ust.hk
更新日期/Last Update: 2007-12-05