利用瑞利波椭圆度反演HVSR数据进行地震场址分类:以新加坡为例

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-09-01 DOI:10.12989/EAS.2021.21.3.231

Shynggys Abdialim, Farkhod Hakimov, Jong R. Kim, T. Ku, Sung-Woo Moon

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引用次数: 1

摘要

横波速度剖面是土层地震危险性评价和液化潜力评价的重要岩土测量手段之一。通过减少时间和成本来提高原位v形分析的有效性是人们非常感兴趣的。因此，本研究旨在评估单站三分量检波器生成的v剖面，并使用额外的井眼测井数据来约束参数空间。基于先前在新加坡Bukit Timah Granite的7个测点进行的多通道表面波分析(MASW)和微震动阵列测量(MAM)，本研究利用HVSR信号进行瑞利波椭圆度(椭圆度曲线)反演，并利用井眼测井数据进行额外的反演约束。利用平均Vs为30 m (Vs30)，定量比较了从MASW和MAM得到的Vs剖面和参考Vs剖面。椭圆曲线反演得到的剖面与v参考剖面吻合较好。基于Vs30的站点分类结果也表明两个测试结果吻合良好。因此，利用现有的井眼测井数据进行进一步的椭圆曲线反演的HVSR测量被认为是一种具有成本效益和时间效益的场地分类方法。

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Seismic Site Classification from HVSR Data using the Rayleigh wave ellipticity inversion: A case study in Singapore

Shear wave velocity (Vs) profile is one of the critical geotechnical measurements of soil layers for seismic hazard assessment and liquefaction potential evaluation. Enhancing the effectiveness of in-situ Vs profiling by reducing time and cost is of great interest. For that reason, this study aims at assessing Vs profile generation from a single-station three-component geophone with additional borehole log data for constraining parameter space. Based on multichannel analysis of surface waves (MASW), and microtremor array Measurements (MAM) conducted previously at seven sites located in Bukit Timah Granite, Singapore, this study utilized HVSR signals for Rayleigh wave ellipticity (ellipticity curve) inversion with additional inversion constraint using borehole log data. The resulting Vs profiles and reference Vs profiles from MASW and MAM were quantitatively compared using average Vs of 30 m (Vs30). The profiles generated from ellipticity curve inversion revealed a good agreement with Vs reference profiles. Vs30 based site classification results also indicated a good fit of two test results. Therefore, HVSR measurements for further ellipticity curve inversion, with already available borehole log data for constraint, is considered as a promising cost and time-effective site classification approach.

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来源期刊

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response