三维非线性粘弹性人工边界地震波动输入研究.doc

文档介绍：
三维非线性粘弹性人工边界地震波动输入
研究#
张波1,2,李术才2,杨学英3,张敦福1,葛颜慧4*
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(1. 山东大学土建与水利学院,济南 250061;
2. 山东大学岩土与结构工程研究中心,济南 250061;
3. 山东城市建设职业学院工程管理系,济南 250014;
4. 山东交通学院土木工程系,济南 250000)
摘要:得到了适于三维非线性分析时粘弹性人工边界的地震波动输入方法。假设计算域内外
的波动传播介质为粘弹性材料,以三维非线性粘弹性人工边界模拟远场介质的辐射阻尼,再
考虑内行入射波在粘弹性介质产生的应力场,以等效边界力法进行地震波动输入。将非线性
粘弹性人工边界的表达式及内行入射波在粘弹性介质产生的应力场表达式结合在一起,确定
了三维非线性粘弹性人工边界地震波动输入时施加在人工边界节点上的等效边界力的具体
表达式,数值算例表明本文方法在进行三维非线性粘弹性人工边界地震动输入时具有有效精
度。
关键词:地震波动输入;非线性;粘弹性人工边界;等效边界力
中图分类号:TU 435
Seismic wave motion input study on nonlinear
three-dimensional viscoelastic artificial boundary
ZHANG Bo1,2, LI Shucai2, YANG Xueying3, ZHANG Dunfu1, GE Yanhui4
(1. School of Civil Engineering, Shandong University, Jinan 250061;
2. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan
250061;
3. Department of Engineering Management, Shandong Urban Construction Vocational College,
Jinan 250014;
4. Department of Civil Engineering, Shandong Jiao Tong University, Jinan 250000)
Abstract: Seismic wave motion input method on three-dimensional nonlinear viscoelastic artificial
boundary was presented in this paper. Taking the assumption that the far field media out of the
computing field and the media in puting field are viscoelastic materials, the radiation damping
of far field media was simulated with three-dimensional nonlinear viscoelastic arti