[1]唐川,陈龙伟,吴晓阳,等.2018年5月28日吉林松原Ms5.7级地震地震动特征分析[J].自然灾害学报,2019,28(03):027-33.[doi:10.13577/j.jnd.2019.0304]
 TANG Chuan,CHEN Longwei,WU Xiaoyang,et al.Characteristics of ground-motion recorded in Songyuan Ms5.7 earthquake on May 28th, 2018[J].,2019,28(03):027-33.[doi:10.13577/j.jnd.2019.0304]
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2018年5月28日吉林松原Ms5.7级地震地震动特征分析
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
28
期数:
2019年03期
页码:
027-33
栏目:
出版日期:
2019-06-28

文章信息/Info

Title:
Characteristics of ground-motion recorded in Songyuan Ms5.7 earthquake on May 28th, 2018
作者:
唐川 陈龙伟 吴晓阳 汪云龙
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):
TANG Chuan CHEN Longwei WU Xiaoyang WANG Yunlong
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:
松原Ms5.7级地震加速度记录衰减关系震害调查反应谱
Keywords:
Songyuan Ms5.7 earthquakeacceleration recordsattenuation relationshipspost-earthquake investigationresponse spectra
分类号:
P315.9;X43
DOI:
10.13577/j.jnd.2019.0304
摘要:
本文通过5月28日松原Ms 5.7级地震数据以及现场实际震害调查分析,揭示本次地震动特点及其与震害的关系,主要结论如下:震中区地表峰值加速度较大,但是震害相对较轻;我国东部长轴和短轴的地震动衰减关系均低估了地震动的PGA值,近地表浅土层对地震PGA起到放大作用;地震记录的傅里叶谱显示其主要频谱成分在1~10 Hz,而加速度5%阻尼比的反应谱成分主要集中在T<0.5 s;距离震中较近的达里巴台和风华台记录的加速度反应谱,在短周期T<0.2 s范围内出现高于规范的0.15 g分区设计谱,甚至局部高于0.2 g分区设计谱,但是低于0.3 g分区反应谱;达里巴台记录的位移反应谱显示位移反应谱峰值较小,甚至局部高于仅为数毫米,所以采取圈梁、构造柱等抗震措施且整体性较好的房屋结构震害较轻。
Abstract:
A study on the characteristics of the ground-motion is carried out using the seismic records recorded during Songyuan earthquake on the May 28th, 2018. The analytical results indicate that the PGAs in the epicentral area stay large but the damage is relatively small. The ground-motion attenuation relationships of the long-axial and short-axial suitable for eastern China both over-predicted the PGA values that the shallow surface geomaterials amplified the ground shaking intensity. Fourier spectra of the records show the frequency components are predominant in range of 1~10 Hz, while the 5% damped response spectra mainly locate in period T<0.5s. The response spectra of 22DLB and 22FHT which are close to the epicenter are higher than the 0.15 g design response spectrum by code in period T<0.2s, and even partially higher than the 0.2g design response spectrum, but stay lower than the 0.3g design response spectrum. Displacement spectra of 22DLB station are low that the maximum displacement values are several millimeters so that the housing structures with good unity which uses tie-beams and construction columns would be less influenced by this earthquake, providing an explanation of small damage but high ground shaking intensity.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-09-29;改回日期:2019-03-07。
基金项目:国家重点研发计划(2018YFC1504004)
作者简介:唐川(1994-),女,硕士研究生,主要从事岩土地震工程与工程抗震方面的研究.E-mail:1053314095@qq.com
通讯作者:陈龙伟(1983-),男,副研究员,博士,主要从事岩土地震工程、土动力学、工程地震方面研究.E-mail:chenlw@iem.ac.cn
更新日期/Last Update: 1900-01-01