Site classification based on predominant period of microtremor’s H/V spectral ratio
SHI Lijing1, LIU Jiaxuan1, CHEN Shengyang1,2
1.CEA Key Lab of Earthquake Engineering & Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration (CEA), Harbin 150080, China;
2.School of Civil Engineering, Tongji University, Shanghai 200092, China
Abstract:The site classification method based on the predominant period of microtremor is simple, economical and quick. Many historical versions of codes and manuals including the Seismic Design Code (1964) have given corresponding classification standards. The current Seismic Design Code (2016) has revised thickness of sediments and equivalent shear wave velocity and other site classification indicators. These classification standards corresponding to the historical version of the code can no longer be applied; at the same time, the latest research at home and abroad also shows that, compared with the predominant period of the horizontal Fourier spectrum used in the early classification standard, the predominant period of the micro-tremor’s H/V spectrum ratio can more effectively express the dynamic characteristics of the site. In this paper, through the microtremor single 3-components records test and H/V spectral ratio analysis on 76 different types of sites, the corresponding relationship between the predominant period of microtremor’s H/V spectrum ratio and the site classification is studied. A set of division schemes for the predominant period of microtremor suitable for site classification in the current Seismic Design Codes are proposed. Among them, the range of the predominant period ranges of class I, II, III and IV sites are: T≤0.08s,0.08s<T≤0.55s,0.55s<T≤0.95s and T>0.95s, respectively. The rationality of this scheme is demonstrated by comparing it with other site classification schemes. The results show that the scheme has been greatly improved, and the accuracy of determining the site category according to the current norms and standards has reached an average of more than 72%.
Key words: Microtremor; H/V spectral ratio; Site classification; the predominant period
师黎静1,刘佳轩1,陈盛扬1,2. 基于地脉动H/V谱比卓越周期的场地类别划分[J]. 振动与冲击, 2022, 41(13): 34-42.
SHI Lijing1, LIU Jiaxuan1, CHEN Shengyang1,2. Site classification based on predominant period of microtremor’s H/V spectral ratio. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(13): 34-42.
[1] Chuanbin Zhu, Marco P, Fabrice C. Which is a better proxy, site period or depth to bedrock, in modelling linear site response in addition to the average shear-wave velocity? [J]. Bulletin of earthquake Engineering, 2020, 18(3):797-820.
[2]Zhao JX, Irikura K, Zhang J, et al. An empirical site-classification method for strong-motion stations in Japan using H/V response ratio[J]. Bulletin of the Seismological Society of America. 2006, 96(3):914-925.
[3]黄俊,陈志高,杨江等.基于谱比法的高铁地震台站场地分类初探.[J].振动与冲击,2019,38(24):28-33+73.
HUANG Jun, CHEN Zhigao, YANG Jiang, et al. Primary investigation on site classification for high speed railway seismic stations in China using a spectral ratio method. [J]. Journal of Vibration and Shock,2019,38(24):28-33+73. (in Chinese)
[4]地震区建筑设计规范(草案稿)[S].哈尔滨:中国科学院土木建筑研究所,1964.
Architectural Design Code for Seismic Zone (Draft) [S]. Harbin: Institute of Civil Engineering and Architecture, Chinese Academy of Sciences, 1964. (in Chinese)
[5]林宗元.岩土工程试验监测手册.[M].北京:中国建筑工业出版社,2005.
Lin Zongyuan. Geo-engineering test monitoring manual. [M]. Bei Jing: China Construction Industry Press, 2005. (in Chinese)
[6]王钟琦,张荣祥,汪敏等.地震区工程选址手册.[M].北京:中国建筑工业出版社,1994.
Wang Zhongxuan, Zhang Rongxiang, Wang Min, et al. The site selection manual for the earthquake area project. [M]. Bei Jing: China Construction Industry Press, 1994. (in Chinese)
[7]CESE74:95. 场地微振动测量计算规程.中国工程建设标准化协会标准[S].北京:中国计划出版社,1996.
CESE74:95. Site micro-vibration measurement and calculation regulations. Standard of China Engineering Construction Standardization Association [S]. Beijing: China Planning Press, 1996. (in Chinese)
[8]GB50011-2010.建筑抗震设计规范,中华人民共和国住房和城乡建设部.[S].北京:中国建筑工业出版社,2016.
GB50011-2010. Code for seismic design of buildings, Ministry of Housing and Urban-Rural Development of the People's Republic of China. [S]. Beijing: China Construction Industry Press, 2016. (in Chinese)
[9]GBJ11-89. 建筑抗震设计规范,中华人民共和国建筑设部.[S]. 北京:中国建筑工业出版社,1989.
GBJ11-89. Code for Seismic Design of Buildings, Ministry of Building Design of the People's Republic of China. [S]. Beijing: China Construction Industry Press, 1989. (in Chinese)
[10]GB50011-2001.建筑抗震设计规范,中华人民共和国建筑设部.[S]. 北京:中国建筑工业出版社,2001.
GB50011-2001.Code for Seismic Design of Buildings, Ministry of Architectural Design of the People's Republic of China. [S]. Beijing: China Construction Industry Press, 2001. (in Chinese)
[11]Nakamura Y. A method for dynamic characteristics of subsurface using microtremors on the ground surface. [J]. Quarterly Reports of Railway Technical Research Institute,1989, 30(1):25-53.
[12]Finn W. Geotechnical engineering aspects of seismic Microzonation. [C] Fourth International Conference on Seismic zonation, Stanford California: E.E.R.I. (editor),1991(1):199-259.
[13]Duval A.M,Bard PY.,Lebrun B,et al. H/V technique for site response analysis. Synthesis of data from various surveys. [J]. BOLLETTINO DI GEOFISICA TEORICA ED APPLICATA , 2001(42):267-280.
[14]郭明珠,谢礼立,凌贤长.弹性介质面波地脉动单点谱比法研究[J].岩土工程学报,2004,26(4):450-453.
Guo Mingzhu, Xie Lili, Ling Xian zhang. Research on spectral ratio of horizontal to vertical component for elastic model and surface microtremors. [J]. Chinese Journal of Geotechnical Engineering, 2004, 26(4): 450-453. (in Chinese)
[15]杨奎,梁北援,刘澜波,等.微动面波的介质响应和H/V谱特征研究[J].地球物理学进展,2012,27(4):1782-1787.
Yang Kui, Liang Beihuan, Liu Lanbo, et al. Research of characteristics of medium response and H/V spectrum of surface wave on microtremor. [J]. Progress in Geophysics, 2012, 27(4): 1782-1787. (in Chinese)
[16]Mihaylov D, Naggar M E, Dineva S. Separation of High and Low‐Level Ambient Noise for HVSR: Application in City Conditions for Greater Toronto Area[J]. Bulletin of the Seismological Society of America,2016,106(5):2177-2184.
[17]Sánchez EP, Tejeda-Jácome JC, Domínguez-Reyes T, et al. Geoseismic Microzonation of the Metropolitan area of Colima-Villa de Alvarez, Mexico.[C].16th world Earthquake Engineering. Chile, 2017,36.
[18]Khedr F, Marzouk I, Elrayess M. Site effect estimation using Horizontal to Vertical (H/V) spectral ratio technique in Nile Delta, Egypt.[J].NRIAG Journal of Astronomy and Geophysics. 2019, 8(1):84-96.
[19]李平,朱胜,田兆阳,等.松原Ms5.7级地震砂土液化场地地脉动特性[J].岩石力学与工程学报,2020,39(04):855-864.
Li Ping, Zhu Sheng, Tian Zhaoyang, et al. Microtremor characteristics of sand liquefaction sites during Songyuan Ms 5.7 earthquake. [J] Chinese Journal of Rock Mechanics and Engineering, 2020, 39 (04): 855-864. (in Chinese)
[20]师黎静,陈盛扬,黎明.哈尔滨季节性冻土场地特征参数研究[J].岩石力学与工程学报,2019,38(05):1053-1063.
Shi Lijing, Chen Shengyang, Li Ming. Research on the characteristic parameters of Harbin seasonal frozen soils. [J]. Chinese Journal of Rock Mechanics and Engineering, 2019, 38 (05): 1053-1063. (in Chinese)
[21]师黎静,陈盛扬.基于地脉动单点谱比的场地特征参数测定方法适用性研究[J].振动与冲击, 2020,39(11):138-145.
Shi Lijing, Chen Shengyang. The applicability of site characteristic parameters measurement based on micro-tremor’s H/V spectra. [J]. Journal of Vibration and Shock, 2020, 39 (11): 138-145. (in Chinese)
[22]工程地质手册编写委员会.工程地质手册[M].北京:中国建筑工业出版社,2007.
The Committee for the Preparation of the Engineering Geology Manual. Engineering Geology Manual [M] Beijing: China Construction Industry Press, 2007. (in Chinese)
[23]齐文浩,薄景山,刘红帅.水平成层场地基本周期的估算公式.[J].岩土工程学报,2013,35(4):779-784.
Qi Wenhao, Bo Jingshan, Liu Hongshuai. Fundamental period formula for horizontal layered soil profiles. [J]. Chinese Journal of Geotechnical Engineering, 2013, 35 (4):779-784. (in Chinese)
[24]Nakamura Y. and Saito A. Estimations of Amplification Characteristics of surface Ground and PGA using Strong Motion Records (in Japanese) [C].17th JSCE Earthquake Eng.symp.1983,25-58.
[25]刘宇实,师黎静.基于地脉动谱比法的场地特征参数快速测定.[J],振动与冲击,2018,37(13):235-242.
Liu yushi, Shi Lijing. Site characteristic parameters' quick measurement based on micro-tremor's H/V spectra. [J], Journal of Vibration and Shock,2018,37(13):235-242.
[26]林淋.竖向振动特征分析.[D].哈尔滨•中国地震局工程力学研究所.2005.
Lin Lin. Vertical vibration characteristic analysis. [D]. Harbin China Seismological Bureau Institute of Engineering And Mechanicals. 2005. (in Chinese)
[27]陈国兴,丁杰发,方怡.场地类别分类方案研究.[J].岩土力学,2020,41(11):1-14.
Chen Guoxing, Ding Jiefa, Fang Yi. Investigation of seismic site classification scheme. [J]. Rock and Soil Mechanics, 2020, 41 (11): 1-14 (in Chinese)
[28]齐文浩.四类场地基本周期对比分析. [J].世界地震工程.2016,32(3):48-52.
Qi Wenhao. Comparison of fundamental periods of four type sites. World Earthquake Engineering. [J].2016, 32 (3): 48-52. (in Chinese)