[1]梁建文,张萍,何颖.深厚软土场地基岩地震动反演——以天津波为例[J].世界地震工程,2020,(03):001-11.
 LIANG Jianwen,ZHANG Ping,HE Ying.Inversion of bedrock ground motion of thick and soft soils with Tianjin earthquake wave as the example[J].,2020,(03):001-11.
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深厚软土场地基岩地震动反演——以天津波为例
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《世界地震工程》[ISSN:/CN:]

卷:
期数:
2020年03期
页码:
001-11
栏目:
出版日期:
2020-08-30

文章信息/Info

Title:
Inversion of bedrock ground motion of thick and soft soils with Tianjin earthquake wave as the example
作者:
梁建文1 张萍1 何颖2
1. 天津大学 建筑工程学院, 天津 300350;
2. 天津城建大学 土木工程学院, 天津 300384
Author(s):
LIANG Jianwen1 ZHANG Ping1 HE Ying2
1. School of Civil Engineering, Tianjin University, Tianjin 300350, China;
2. School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China
关键词:
深厚软土场地频率截断地震波反演基岩地震动天津波
Keywords:
thick and soft soilsfrequency cut-offground motion inversionbedrock ground motionTianjin earthquake ground motion
分类号:
P315.9TU311.3
摘要:
根据天津波地表加速度记录和相应实测场地钻孔资料,采用等效线性化方法模拟土体非线性,进行了深厚软土场地基岩地震动反演,研究了频率截断对深厚软土场地基岩地震动反演的影响,为天津波地表加速度记录提供了相应的基岩地震动输入。研究表明:不同截断频率情况下,反演得到的基岩地震动峰值和反应谱曲线形状均相差悬殊,但反演后再正演所得到的地面运动与原地表记录相比,加速度时程曲线形状和峰值大小、反应谱曲线形状和峰值大小均非常接近;可根据工程需要对地表加速度记录进行不同频率的截断,反演得到所需强度的基岩地震动。
Abstract:
Based on the surface ground motion (acceleration time-history) of Tianjin earthquake and the corresponding measured site profiles, the inversion of bedrock ground motion of thick and soft soil site is carried out, using the equivalent linearization method to simulate the soft soil nonlinearity. This paper provids the bedrock ground motion of Tianjin earthquake. The influence of cut-off frequency on bedrock ground motion inversion in thick and soft soils is discussed. It is shown that, both the peaks and the response spectral shapes of the bedrock ground motion obtained by the inversion are significantly different for different cut-off frequencies. However, if we input the inversed earthquake motion at the bedrock to make forward response calculation, the shape and peak of the acceleration time-history and the response spectrum the surface ground motion are all in good agreement with the Tianjin earthquake ground motion. The bedrock ground motion with desired amplitude can be inversed by frequency cut-off of ground motion according to engineering demand.

参考文献/References:

[1] HU Yuxian. Input identification from structural vibrational response, Research Report, No. UCB/EERC-80/76, Earthquake Engineering Research Center, University of California, Berkeley, 1980.
[2] 胡聿贤, 朱镜清, 朱莉, 等. 频域中的结构振动输入反演[J]. 地震工程与工程振动, 1981,1(1):41-55. HU Yuxian, ZHU Jingqing, ZHU Li, et al. Identification of input to vibrational structure in frequency domain[J]. Earthquake Engineering and Engineering Vibration, 1981, 1(1):41-55. (in Chinese)
[3] 胡聿贤, 朱镜清, 朱莉. 非线性振动输入反演的时频域法[J]. 地震工程与工程振动, 1982, 2(2):1-10. HU Yuxian, ZHU Jingqing, ZHU Li. A mixed method for the input identification of nonlinear vibrations[J]. Earthquake Engineering and Engineering Vibration, 1982, 2(2):1-10. (in Chinese)
[4] 谢君斐, 石兆吉, 地面运动的反演及其在震害分析中的应用[J], 地震工程与工程振动, 1981, 1(2):9-24. XIE Junfei, SHI Zhaoji. The inverse calculation of ground motion with application to earthquake damage analysis[J]. Earthquake Engineering and Engineering Vibration, 1981, 1(2):9-24. (in Chinese)
[5] 蔡袁强, 凌道盛, 周迪永, 等. 非线性分层地基地面运动反演分析[J]. 振动工程学报, 2000, 13(3):426-432. CAI Yuanqiang, LING Daosheng, ZHOU Diyong, et al. Inverse calculational analysis of ground motion in non-linear layered soil[J]. Journal of Vibration Engineering, 2000, 13(3):426-432. (in Chinese)
[6] 潘晓东, 董天乐, 蔡袁强, 等. 非线性成层地基下基岩平稳地震动输入[J]. 振动工程学报, 2006, 19(2):246-251. PAN Xiaodong, DONG Tianle, CAI Yuanqiang, et al. Study on stationary earthquake motion input at bedrock under nonlinear layered soils[J]. Journal of Vibration Engineering, 2006, 19(2):246-251. (in Chinese)
[7] 陈清军, 刘拓. 地震波反演两种计算方法比较与频率截断问题的探讨[J]. 力学季刊, 2010, 31(3):388-394. CHEN Qingjun, LIU Tuo. Comparison of two methods of ground motion inversion and discussion on question of frequency cut-off[J]. Chinese Quarterly of Mechanics, 2010, 31(3):388-394. (in Chinese)
[8] 梁建文, 张爱娟, 何颖. 层状弹性场地基岩斜入射地震动二维反演[J]. 振动工程学报, 2014, 27(3):441-450. LIANG Jianwen, ZHANG Aijuan, HE Ying. 2-D Inversion of obliquely incident earthquake ground motion in layered elastic half-space[J]. Journal of Vibration Engineering, 2014, 27(3):441-450. (in Chinese)
[9] LIANG Jianwen, ZHANG Aijuan, HE Ying, et al. 2D nonlinear inversion of bedrock motion from the surface motion of a layered half-space[J]. Engineering Analysis with Boundary Elements, 2019, 106:149-159.
[10] 胡聿贤.地震工程学[M].北京:地质出版社,2006. HU Yuxian, Earthquake Engineering[M]. Beijing:Geological Publishing House, 2006. (in Chinese)
[11] GB17741-2005,工程场地地震安全性评价[S].北京:中国标准出版社,2005. GB17741-2005 Seismic Safety Evaluation of Engineering Sites[S].Beijing:China Standardization Press,2005.(in Chinese)
[12] 王亮, 袁晓铭, 王永志, 等. 基于KiK-net强震台网的软弱土层放大效应研究[J]. 地震工程与工程振动, 2014, 34(S1):904-908. WANG Liang, YUAN Xiaoming, WANG Yongzhi, et al. The research on soft soil layer amplification effect based on KIK-net strong-motion seismograph network[J]. Earthquake Engineering and Engineering Dynamics, 2014, 34(S1):904-908. (in Chinese)

备注/Memo

备注/Memo:
收稿日期:2019-05-28;改回日期:2020-03-03。
基金项目:国家自然科学基金资助项目(51578372)
作者简介:梁建文(1965-),男,教授,博士生导师,主要从事地震工程研究.E-mail:liang@tju.edu.cn
更新日期/Last Update: 1900-01-01