[1]蒋新新,李建波,林皋.边坡场地条件下粘弹性人工边界模型的地震输入模式研究[J].世界地震工程,2013,(04):126-132.
 JIANG Xinxin,LI Jianbo,LIN Gao.Study on the seismic input mode of viscoelastic artificial boundary under the condition of slope site[J].,2013,(04):126-132.
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边坡场地条件下粘弹性人工边界模型的地震输入模式研究
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《世界地震工程》[ISSN:/CN:]

卷:
期数:
2013年04期
页码:
126-132
栏目:
出版日期:
2013-12-30

文章信息/Info

Title:
Study on the seismic input mode of viscoelastic artificial boundary under the condition of slope site
作者:
蒋新新12 李建波12 林皋2
1. 水能资源利用关键技术湖南省重点实验室, 湖南 长沙 410014;
2. 大连理工大学 工程抗震研究所, 辽宁 大连 116024
Author(s):
JIANG Xinxin12 LI Jianbo12 LIN Gao2
1. Hunan Provincial Key Laboratory of Key Technology on Hydropower Development, Changsha 410014, China;
2. Institute of Earthquake Engineering, Dalian University of Technology, Dalian 116024 China
关键词:
边坡场地结构-地基相互作用粘弹性边界对称子结构
Keywords:
slope sitestructure-foundation interactionviscoelastic boundarysymmetrical sub-structure
分类号:
U442.5+5
摘要:
粘弹性人工边界模型在水利工程与核电站抗震分析领域应用广泛,但当该方法应用于边坡场地条件下的土-结构相互作用分析时,往往会出现地基区域外边界地震输入荷载的不一致等问题,可能导致结构响应发散或位移漂移,对计算结果的合理性产生影响。从动力相互作用原理出发,关注粘弹性人工边界模型的地震动输入机制,构建了基于虚拟的对称子结构体系的地震输入模式。该地震输入模式不但满足了地基区域外边界地震整体荷载一致,而且可有效模拟地基内地震波的传播。最后以边坡场地的动力响应数值分析为例,验证了所提方法的精度与数值稳定性。
Abstract:
The viscoelastic artificial boundary model is widely used to the field of earthquake resistance analysis of water conservancy project and nuclear power station. However, for the analysis of soil-structure dynamic interaction on the sloping site,some problems will be caused while using that method. The large size difference of side facades on the outer boundary will cause inconsistent horizontal seismic force, which may lead to the divergent results or the drift of displacement. In this paper, based on the basic formula of dynamic interaction and seismic input mechanism, a virtual symmetrical sub-structure system is built to solve those problems, which not only satisfies the consistence of whole seismic input on outer boundary but also simulates the seismic wave propagation validly. Finally, the accuracy and the stability of the new method are verified through numerical example on the sloping site.

参考文献/References:

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[7] 刘晶波, 王振宇, 杜修力, 等.波动问题中的三维时域粘弹性人工边界[J].工程力学, 2005, 22(6):46-51. LIU Jingbo, WANG Zhenyu, DU Xiuli, etal. Three-dimension visco-elastic artificial boundaries in domain for wave motion problems[J].Engineering Mechanics, 2005, 22(6):46-51.
[8] 李建波, 陈建云, 林皋.求解非均匀无限地基相互作用力的有限元时域阻尼抽取法[J].岩土工程学报, 2004, 26(2):263-267. LI Jian-bo, CHEN Jian yun, LIN Gao. Finite element damping extraction method for dynamic interaction time domain analysis of non-homogeneous unbounded rock[J]. Chinese journal of Geotechnical Engineering, 2004, 26(2):263~267.)
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备注/Memo

备注/Memo:
收稿日期:2013-2-16;改回日期:2013-5-18。
基金项目:国家自然科学基金重点项目(51138001),水能资源利用关键技术湖南省重点实验室开放基金(PKLHD201303)
作者简介:蒋新新(1990-),男,硕士,主要从事结构抗震数值模拟.E-mail:jxxstar@mail.dlut.edu.cn
通讯作者:李建波,男,副教授,主要从事水工结构及核电结构的抗震安评研究.E-mail:jianboli@dlut.edu.cn
更新日期/Last Update: 1900-01-01