| 近断层地震下可液化场地土反应的数值模拟 |
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| 引用本文： | 张雪枫,刘林,杨庆山,李英勇. 近断层地震下可液化场地土反应的数值模拟[J]. 世界地震工程, 2010, 0(Z1) |
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| 作者姓名： | 张雪枫 刘林 杨庆山 李英勇 |
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| 作者单位： | 北京交通大学土建学院;山东省交通厅公路局; |
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| 基金项目： | 国家自然科学基金项目(50938008); 山东省交通科技计划项目(2009Y007) |
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| 摘 要： | 液化条件下场地土大变形是造成工程结构失效的主要原因之一。文中以某高速公路特大桥的可液化岸坡近场场地为研究对象,基于PL-Finn液化本构模型,利用FLAC 3D程序对其在地震作用下的动响应全过程进行了数值模拟分析。结果表明,PL-Finn模型可较好地反映地震过程中孔隙水压、液化区的变化规律,并能较好的预测液化后场地土的变形规律。液化引起的地基土大变形对桥梁桩基的影响需引起重视。
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| 关 键 词： | 土动力学 砂土液化 孔隙水压力 数值模拟 地震反应 |
Numerical simulation of seismic response of liquefiable site soils due to near-fault earthquakes |
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| ZHANG Xuefeng,LIU Lin,YANG Qingshan,LI Yingyong. Numerical simulation of seismic response of liquefiable site soils due to near-fault earthquakes[J]. World Information On Earthquake Engineering, 2010, 0(Z1) |
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| Authors: | ZHANG Xuefeng LIU Lin YANG Qingshan LI Yingyong |
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| Affiliation: | ZHANG Xuefeng1,LIU Lin1,YANG Qingshan1,LI Yingyong2(1.School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China,2.Highway Bureau of Transportation Office,Jinan 250002,China) |
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| Abstract: | The large displacement of sandy soils due to seismic liquefaction is one of the main sources that induce the failure of engineering structures.The sloping site for a highway bridge at near-fault region is presented in this paper,and based on PL-Finn constitutive model,the process of the seismic response due to liquefaction is simulated by using FLAC 3D.The numerical simulations indicate that the PL-Finn model can better demonstrate the variation of the pore water pressure,the liquefied zone distribution and... |
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| Keywords: | soil dynamics liquefaction of sandy soil pore water pressure numerical simulation seismic response |
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