复杂区域地形条件下台地地震动放大效应研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (23) : 230-239.

论文

复杂区域地形条件下台地地震动放大效应研究

赵仕兴 1，罗麒锐 1，熊峰 2，吴启红 3，夏静 1，杨姝姮 1，张敏 4

作者信息 +

Amplification effect of plateau ground motion under complex regional terrain conditions

ZHAO Shixing1, LUO Qirui1, XIONG Feng2, WU Qihong3, XIA Jing1, YANG Shuheng1, ZHANG Min4

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文章历史 +

摘要

针对不规则地形地震动放大效应的相关规定均是以孤立地形为对象，但山区地形常以群山形式存在，相邻地形会影响地震波传播，从而改变地表运动规律。因此研究非孤立地形的地震动放大效应对山区建筑的抗震设计及提升震后灾害评估准确性具有重要意义。本文首先阐述了在泸定6.8级地震中磨西台地不利地段发生的典型地形放大效应。随后利用仿真手段深入探索了复杂区域地形（山脊、峡谷）对台地地震动放大系数的影响。从放大系数空间分布、加速度傅里叶谱及幅值比的角度进行量化研究，并通过大量变参分析获得复杂区域地形对台地表面的运动规律。结果表明，在某些情况下《抗规》低估了台地地形效应，放大系数建议值难以保证结构“大震不倒”，需进行调整和细化。此外，相邻山脊和峡谷对台地表面均有明显影响，不应被忽略，因此建议相关规范增加调整系数来考虑相邻地形之间相互影响。

Abstract

The relevant regulations for the amplification effect of ground motion on irregular terrain were all based on isolated terrain. However, mountainous topography often existed in the form of mountains, and adjacent topography would affect the earthquake wave propagation and change the law of ground motion. Therefore, it was of great significance to study the ground motion amplification factor of non-isolated terrain for the seismic design of mountain buildings and improving the accuracy of post-earthquake disaster assessment. In this paper, the typical topographic amplification effect occurred in the unfavorable section of Moxi platform during the Luding MS6.8 earthquake was described. Then, the influence of complex topography (ridge and canyon) on the amplification factor of ground motion of the platform was deeply explored by simulation. The spatial distribution of amplification factor, Fourier spectrum of acceleration and amplitude ratio were quantitatively studied, and the motion rules of complex topographic on platform surface were obtained through a large number of analyses. The results showed that the regulations in “Seismic Code” underestimated the topographic effect of the platform in some cases, and the suggestive value of the amplification factor was difficult to ensure the safety of the structure. Thus, it needed to be adjusted and refined. In addition, the adjacent ridges and canyons had obvious effects on the platform surface and should not be ignored. Therefore, it was suggested that the relevant specifications should increase the adjustment coefficient to consider the interaction between adjacent landforms.

导出引用

赵仕兴 1, 罗麒锐 1, 熊峰 2, 吴启红 3, 夏静 1, 杨姝姮 1, 张敏 4. 复杂区域地形条件下台地地震动放大效应研究[J]. 振动与冲击, 2024, 43(23): 230-239

ZHAO Shixing1, LUO Qirui1, XIONG Feng2, WU Qihong3, XIA Jing1, YANG Shuheng1, ZHANG Min4. Amplification effect of plateau ground motion under complex regional terrain conditions[J]. Journal of Vibration and Shock, 2024, 43(23): 230-239

参考文献

[1] 李平, 张宇东, 薄涛, 等. 基于离心机振动台试验的梯形河谷场地地震动效应研究[J]. 岩土力学, 2020, 41(4): 1270-1278, 1286.
LI Ping, ZHANG Yu-dong, BO Tao, et al. Study of ground motion effect of trapezoidal valley site based on centrifuge shaking table test [J]. Rock and soil mechanics, 2020, 41(4): 1270-1278, 1286.
[2] 卓发成. 山谷地形对入射SV波地震反应分析[J]. 地震工程学报, 2021, 43(1): 11-18.
ZHUO Fa-cheng. Effect of valley topography on the surface ground motion subjected to incident SV waves [J]. Chinese earthquake engineering journal, 2021, 43(1): 11-18.
[3] 高玉峰, 代登辉, 张宁. 河谷地形地震放大效应研究进展与展望[J]. 防灾减灾工程学报, 2021, 41(4): 734-752.
GAO Yu-feng, DAI Deng-hui, ZHANG Ning. Progress and prospect of topographic amplification effects of seismic wave in canyon sites [J]. Journal of disaster prevention and mitigation engineering, 2021, 41(4): 734-752.
[4] 高玉峰, 代登辉, 张宁. 翡翠河谷地震动地形效应解析分析[J]. 地震学报, 2022, 44(1): 40-49.
GAO Yu-feng, DAI Deng-hui, ZHANG Ning. Analytical study on the topographic effect on ground motion of Feitsui canyon [J]. Acta seismologica sinica, 2022, 44(1): 40-49.
[5] 周红, 常莹. 利用BP神经网络技术建立自贡地区地震动地形效应模型及其在汶川地震中的效验[J]. 地球物理学报, 2022, 65(6): 2022-2034.
ZHOU Hong, CHANG Ying. A seismic topographic effect model in Zigong area established by a BP technique and its verification with the Wenchuan earthquake [J]. Chinese journal of geophysics, 2022, 65(6): 2022-2034.
[6] 贺建先, 王运生, 罗永红, 等. 康定M_S6.3级地震斜坡地震动响应监测分析[J]. 工程地质学报, 2015, 23(3): 383-393.
HE Jian-xian, WANG Yun-sheng, LUO Yong-hong, et al. Monitoring result analysis of slope seismic response during the kangding MS6. 3 earthquake [J]. Journal of engineering geology, 2015, 23(3): 383-393.
[7] Zhang Z, Fleurisson J A, Pellet F L. A case study of site effects on seismic ground motions at Xishan Park ridge in Zigong, Sichuan, China [J]. Engineering Geology, 2018, 243: 308-319.
[8] LIANG J W, ZHANG Y S ， LEE V W. Scattering of plane P waves by a semi-cylindrical hill: analytical solution [J]. Earthquake Engineering and Engineering Vibration, 2005, 4: 27-36.
[9] Tsaur D H, Chang K H. Scattering and focusing of SH waves by a convex circular-arc topography [J]. Geophysical Journal International, 2009, 177(1): 222-234.
[10] 殷跃平, 王文沛, 李滨, 等. 地层场地效应对东河口地震滑坡发生影响研究[J]. 土木工程学报, 2016, 49(S2): 126-131.
YIN Yue-ping, WANG Wen-pei, LI Bin, et al. Study of stratigraphic site effect on the failure mechanism of Donghekou rockslide triggered by Wenchuan earthquake [J]. China civil engineering journal, 2016, 49(S2): 126-131.
[11] Liang J, Liu Z, Huang L, et al. The indirect boundary integral equation method for the broadband scattering of plane P, SV and Rayleigh waves by a hill topography [J]. Engineering Analysis with Boundary Elements, 2019, 98: 184-202.
[12] 詹志发, 祁生文, 何乃武, 等. 强震作用下均质岩质边坡动力响应的振动台模型试验研究[J]. 工程地质学报, 2019, 27(5): 946-954.
ZHAN Zhi-fa, QI Sheng-wen, HE Nai-wu, et al. Shaking table test study of homogeneous rock slope model under strong earthquake [J]. Journal of engineering geology, 2019, 27(5): 946-954.
[13] Wu Z, Zhang D, Wang S, et al. Dynamic-response characteristics and deformation evolution of loess slopes under seismic loads [J]. Engineering Geology, 2020, 267: 105507.
[14] 张世亮, 马强, 陶冬旺, 等. 应用邻近强震动站点主余震记录的场地及地形效应分析[J]. 振动与冲击, 2023, 42(21): 200-210.
ZHANG Shi-liang, MA Qiang, TAO Dong-wang, et al. Analysis of site and topography effects using strong motion records of the mainshock and aftershocks from nearby stations [J]. Journal of vibration and shock, 2023, 42(21): 200-210.
[15] Eurocode 8. ENV 2000—5 Design provisions for earthquake resistance of structures - part 5: foundations, retaining structures and geotechnical aspects [S]. Brussels: CEN European Committee for Standardisation, 2000.
[16] 建筑抗震设计规范: GB 50011—2010 [S]. 2016 年版. 北京: 中国建筑工业出版社, 2016.
Code for seismic design of buildings: GB 50011—2010 [S]. Bei jing: China architecture & building press, 2016.
[17] Wang G, Du C, Huang D, et al. Parametric models for 3D topographic amplification of ground motions considering subsurface soils [J]. Soil Dynamics and Earthquake Engineering, 2018, 115: 41-54.
[18] 李郑梁, 李建春, 刘波, 等. 浅切割的高山峡谷复杂地形的地震动放大效应研究[J]. 工程地质学报, 2021, 29(1): 137-150.
LI Zheng-liang, LI Jian-chun, LIU Bo, et al. Seismic motion amplification effect of shallow-cutting hill-canyon composite topography [J]. Journal of engineering geology, 2021, 29(1): 137-150.
[19] Zhao S, Luo Q, Zhang M, et al. Numerical analysis of ground motion amplification coefficient under complex topography [J]. Structures, 2023, 58: 105353.
[20] 董孝曜, 郭迅, 罗若帆, 等. 泸定6.8级地震震害调查及结构受力分析[J]. 建筑结构学报, 2023, 44(S2): 11-19.
DONG Xiao-yao, GUO Xun, LUO Ruo-fan, et al. Seismic damage investigation and structural force analysis of Luding MS6.8 [J]. Journal of building structures,
[21] 赵登科, 王自法, 李兆焱, 等. 泸定MS6.8地震房屋损失快速评估[J]. 世界地震工程, 2023, 39(2): 178-188.
ZHAO Deng-ke, WANG Zi-fa, LI Zhao-yan, et al. Rapid assessment of building losses in Luding MS6.8 earthquake [J]. World earthquake engineering, 2023, 39(2): 178-188.
[22] 刘泽民, 李俊, 苏金蓉, 等. 2022年四川泸定MS6.8地震余震序列的自动构建与地震活动性分析[J]. 地球物理学报, 2023, 66(5): 1976-1990.
LIU Ze-min, LI Jun, SU Jin-rong, et al. Auto-building of aftershock sequence and seismicity analysis for the 2022 Luding, Sichuan, MS6.8 earthquake [J]. Chinese journal of geophysics, 2023, 66(5): 1976-1990.s
[23] 王玉婕, 张丽芬, 孙晓丹, 等. 2022年四川泸定MS6.8地震近场强震动模拟[J]. 大地测量与地球动力学, 2023, 43(5): 441-446, 516.
WANG Yu-jie, ZHANG Li-fen, SUN Xiao-dan, et al. Simulation of near field strong vibration of the 2022 Luding MS6.8 earthquake in Sichuan Province [J]. Journal of geodesy and geodynamics, 2023, 43(5): 441-446, 516.
[24] 潘毅, 任靖哲, 任宇, 等. 考虑台地效应的泸定6.8级地震某框架结构震害调查与分析[J]. 土木工程学报, 2024, 57(6): 136-151.
PAN Yi ，REN Jingzhe ，REN Yu ，et al. Seismic damage investigation and analysis of frame structures in Luding Ms6.8 earthquake considering platform effect. 土木工程学报, 2024, 57(6): 136-151.
[25] 刘晶波, 宝鑫, 李述涛, 等. 采用黏弹性人工边界时显式算法稳定性条件[J]. 爆炸与冲击, 2022, 42(3): 124-137.
LIU Jing-bo, BAO Xin, LI Su-tao, et al. Stability conditions of explicit algorithms when using viscoelastic artificial boundaries [J]. Explosion and shock waves, 2022, 42(3): 124-137.
[26] 马笙杰, 迟明杰, 陈红娟, 等. 黏弹性人工边界在ABAQUS中的实现及地震动输入方法的比较研究[J]. 岩石力学与工程学报, 2020, 39(7): 1445-1457.
MA Sheng-jie, CHI Ming-jie, CHEN Hong-juan, et al. Implementation of viscous-spring boundary in ABAQUS and comparative study on seismic motion input methods [J]. Chinese journal of rock mechanics and engineering, 2020, 39(7): 1445-1457.
[27] Luo Y, Fan X, Huang R, et al. Topographic and near-surface stratigraphic amplification of the seismic response of a mountain slope revealed by field monitoring and numerical simulations [J]. Engineering Geology, 2020, 271: 105607.
[28] 黄景琦 ,杜修力, 田志敏, 等. 斜入射SV波对地铁车站地震响应的影响[J]. 工程力学, 2014, 31(9): 81-88, 103.
HUANG Jing-qi, DU Xiu-li, TIAN Zhi-min, et al. Effect of the oblique incidence of seismic sv waves on the seismic response of subway station structure [J]. Engineering mechanics, 2014, 31(9): 81-88, 103.
[29] Sun Z, Kong L, Guo A, et al. Experimental and numerical investigations of the seismic response of a rock–soil mixture deposit slope [J]. Environmental Earth Sciences, 2019, 78: 1-14.