[1]李晓朋,刘启方,谷慎昌,等.SH波作用下三维软弱夹杂对地面运动的影响[J].地震工程与工程振动,2017,01(6):001-14.[doi:10.13197/j.eeev.2017.06.1.lixp.001]
 LI Xiaopeng,LIU Qifang,GU Shenchang,et al.Effects of 3D soft inclusion on ground motion under incident SH waves[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2017,01(6):001-14.[doi:10.13197/j.eeev.2017.06.1.lixp.001]
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SH波作用下三维软弱夹杂对地面运动的影响
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《地震工程与工程振动》[ISSN:/CN:]

卷:
01
期数:
2017年6
页码:
001-14
栏目:
论文
出版日期:
2017-12-31

文章信息/Info

Title:
Effects of 3D soft inclusion on ground motion under incident SH waves
作者:
李晓朋 刘启方 谷慎昌 李晓轩
中国地震局 工程力学研究所, 中国地震局地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080
Author(s):
LI Xiaopeng LIU Qifang GU Shenchang LI Xiaoxuan
Institute of Engineering Mechanics, China Earthquake Administration;Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration, Harbin 150080, China
关键词:
三维有限元软弱夹杂谱比深宽比反应谱
Keywords:
three-dimensional finite elementsoft inclusionspectral ratioaspect ratioresponse spectrum
分类号:
P315
DOI:
10.13197/j.eeev.2017.06.1.lixp.001
摘要:
基于三维有限元数值模拟对单一浅埋软弱立方体夹杂对地面运动的影响进行研究。通过谱比曲线分析了浅埋软弱夹杂及深宽比对地面运动的放大作用,并分析了夹杂对加速度峰值和反应谱的影响。最后,与二维有限元数值模拟结果进行比较。结果表明:软弱夹杂对R<0.85l区域的地面运动放大作用明显,地面运动最大点位于夹杂中心在地表的投影处;当深宽比较小时(N≤1/2),夹杂会对地面运动产生较大的放大作用,当深宽比N≥1时夹杂对地面运动无明显的放大作用,深宽比N=1/16时对地面运动的最大放大倍数是无夹杂自由场的4.2倍;二维模型下夹杂对地面运动放大的频段范围要比三维的宽,放大倍数要比三维的小。
Abstract:
The influence of single shallow buried soft cubic inclusion to ground motion is studied based on 3D finite element numerical simulation. The ground motion amplified effect influenced by shallow buried soft inclusion and aspect ratio is analyzed with spectral ratio curve. Besides, the peak acceleration and acceleration response spectrum with soft inclusion is also studied. At last, the results of 2D and 3D numerical simulation are compared. The results show that the ground motion amplified with soft inclusion is very significant in the area of R<0.85l and the maximum amplification is at the center projection of inclusion on the surface; Significant amplification of soft inclusion acts on ground motion only when the aspect ratio is small(N ≤ 1/2), and there is no significant amplification when N ≥ 1, such as the maximum magnification of the ground motion is 4.2 times that of free field when the aspect ratio N=1/16; The frequency range of the ground motion amplified by soft inclusion of 2D numerical simulation is wider than the result of 3D numerical simulation whereas the magnification is smaller than that of 3D numerical simulation.

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备注/Memo

备注/Memo:
收稿日期:2017-03-15;改回日期:2017-05-20。
基金项目:中国地震局工程力学研究所基本科研业务费专项资助项目(2016A04);国家自然科学基金项目(51378479);国家重大科技专项(2013zx06002001-09)
作者简介:李晓朋(1988-),男,硕士研究生,主要从事地震工程的研究.E-mail:captainlixp@163.com
通讯作者:刘启方(1969-),男,研究员,博士,主要从事地震工程的研究.E-mail:qifang_liu@126.com
更新日期/Last Update: 1900-01-01