2023 年 2 月 6 日土耳其 Kahramanmaraş 7.8 Pazarcık 地震的综合地动特征:对衰减效应、场地响应和震源特性的深入研究

IF 3.8 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL Bulletin of Earthquake Engineering Pub Date : 2024-10-11 DOI:10.1007/s10518-024-02028-2
Yuxiang Tang, Karin Şeşetyan, P. Martin Mai
{"title":"2023 年 2 月 6 日土耳其 Kahramanmaraş 7.8 Pazarcık 地震的综合地动特征:对衰减效应、场地响应和震源特性的深入研究","authors":"Yuxiang Tang,&nbsp;Karin Şeşetyan,&nbsp;P. Martin Mai","doi":"10.1007/s10518-024-02028-2","DOIUrl":null,"url":null,"abstract":"<div><p>The devastating <span>\\(\\:{M}_{W}\\)</span> 7.8 Pazarcık earthquake on February 6, 2023, profoundly impacted a large region in south-central Türkiye and northwestern Syria, resulting in over 50,000 casualties and widespread damage. To better understand source properties and wave-propagation effects of this event, we analyze the strong ground-motion data recorded at ~ 230 stations. We determine the regional distance-dependent attenuation using the horizontal RotD50 Fourier acceleration amplitude spectrum (FAS) in the frequency range of 0.1–20 Hz. We find an apparent near-source saturation effect which needs to incorporate an additional finite-fault factor for the distance scaling. Uncertainty and sensitivity analyses are considered by variable decay rates in the geometric spreading model. For each decay rate, we derive a corresponding <span>\\(\\:Q\\left(f\\right)\\)</span> model to account for the frequency-dependent anelastic attention. Significant duration of ground motions is modelled for two different measurements based on Arias intensity (<span>\\(\\:{I}_{A}\\)</span>). For site amplification, we construct a model containing both <span>\\(\\:{V}_{S30}\\)</span>-scaling and peak ground acceleration (PGA)-scaling. Source parameters are then determined using a reference Fourier source spectrum at 1.0 km. Specifically, we estimate the mean corner-frequency as <span>\\(\\:{f}_{0}\\)</span>= 0.036 Hz, Brune stress drop as Δσ = 4.79 MPa and the reference rock site κ<sub>0</sub> = 0.051 s. By analyzing near-source pulse-like waveforms, we demonstrate that the mismatch of peak ground velocity (PGV) between our model and close-distance observations is due to the rupture directivity effect. Finally, we compare ground motions of the 2023 <span>\\(\\:{M}_{W}\\)</span> 7.8 event to those of the 2023 <span>\\(\\:{M}_{W}\\)</span> 7.6 Elbistan and the 2020 <span>\\(\\:{M}_{W}\\)</span> 6.7 Sivrice earthquakes. Attenuation effects estimated for the three events are found to be identical between ~ 0.2 and 6.0 Hz, with slight differences in site responses above ~ 5.0 Hz. Source spectra comparisons indicate that the source properties are complicated for all three events. Our comprehensive ground-motion analyses contribute to understanding and modeling regional properties of attenuation, site response, and event-based source characteristics that are important for future region-specific seismic hazard assessment.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"22 14","pages":"6829 - 6857"},"PeriodicalIF":3.8000,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10518-024-02028-2.pdf","citationCount":"0","resultStr":"{\"title\":\"Comprehensive ground-motion characterization of the 6 February 2023 \\\\(\\\\:{\\\\varvec{M}}_{\\\\varvec{W}}\\\\) 7.8 Pazarcık earthquake in Kahramanmaraş, Türkiye: insights into attenuation effects, site responses and source properties\",\"authors\":\"Yuxiang Tang,&nbsp;Karin Şeşetyan,&nbsp;P. Martin Mai\",\"doi\":\"10.1007/s10518-024-02028-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The devastating <span>\\\\(\\\\:{M}_{W}\\\\)</span> 7.8 Pazarcık earthquake on February 6, 2023, profoundly impacted a large region in south-central Türkiye and northwestern Syria, resulting in over 50,000 casualties and widespread damage. To better understand source properties and wave-propagation effects of this event, we analyze the strong ground-motion data recorded at ~ 230 stations. We determine the regional distance-dependent attenuation using the horizontal RotD50 Fourier acceleration amplitude spectrum (FAS) in the frequency range of 0.1–20 Hz. We find an apparent near-source saturation effect which needs to incorporate an additional finite-fault factor for the distance scaling. Uncertainty and sensitivity analyses are considered by variable decay rates in the geometric spreading model. For each decay rate, we derive a corresponding <span>\\\\(\\\\:Q\\\\left(f\\\\right)\\\\)</span> model to account for the frequency-dependent anelastic attention. Significant duration of ground motions is modelled for two different measurements based on Arias intensity (<span>\\\\(\\\\:{I}_{A}\\\\)</span>). For site amplification, we construct a model containing both <span>\\\\(\\\\:{V}_{S30}\\\\)</span>-scaling and peak ground acceleration (PGA)-scaling. Source parameters are then determined using a reference Fourier source spectrum at 1.0 km. Specifically, we estimate the mean corner-frequency as <span>\\\\(\\\\:{f}_{0}\\\\)</span>= 0.036 Hz, Brune stress drop as Δσ = 4.79 MPa and the reference rock site κ<sub>0</sub> = 0.051 s. By analyzing near-source pulse-like waveforms, we demonstrate that the mismatch of peak ground velocity (PGV) between our model and close-distance observations is due to the rupture directivity effect. Finally, we compare ground motions of the 2023 <span>\\\\(\\\\:{M}_{W}\\\\)</span> 7.8 event to those of the 2023 <span>\\\\(\\\\:{M}_{W}\\\\)</span> 7.6 Elbistan and the 2020 <span>\\\\(\\\\:{M}_{W}\\\\)</span> 6.7 Sivrice earthquakes. Attenuation effects estimated for the three events are found to be identical between ~ 0.2 and 6.0 Hz, with slight differences in site responses above ~ 5.0 Hz. Source spectra comparisons indicate that the source properties are complicated for all three events. Our comprehensive ground-motion analyses contribute to understanding and modeling regional properties of attenuation, site response, and event-based source characteristics that are important for future region-specific seismic hazard assessment.</p></div>\",\"PeriodicalId\":9364,\"journal\":{\"name\":\"Bulletin of Earthquake Engineering\",\"volume\":\"22 14\",\"pages\":\"6829 - 6857\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-10-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10518-024-02028-2.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bulletin of Earthquake Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10518-024-02028-2\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Earthquake Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10518-024-02028-2","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
引用次数: 0

摘要

2023 年 2 月 6 日发生的帕扎尔切克 7.8 级破坏性地震严重影响了图尔基耶中南部和叙利亚西北部的大片地区,造成 50,000 多人伤亡和广泛破坏。为了更好地了解这次地震的震源特性和波传播效应,我们分析了约 230 个站点记录的强地动数据。我们使用频率范围为 0.1-20 Hz 的水平 RotD50 傅立叶加速度振幅谱 (FAS) 来确定区域距离衰减。我们发现了明显的近源饱和效应,这需要在距离缩放中加入额外的有限故障因子。通过几何扩展模型中的可变衰减率,考虑了不确定性和敏感性分析。对于每种衰减率,我们推导出一个相应的(\:Q\left(f\right)\)模型,以考虑频率相关的非弹性注意。基于阿里亚斯强度(\(\:{I}_{A}\))的两种不同测量方法对地动的显著持续时间进行建模。对于场地放大,我们构建了一个包含 \(\:{V}_{S30}\) 缩放和峰值地面加速度 (PGA) 缩放的模型。然后使用 1.0 公里处的参考傅立叶源频谱确定源参数。具体来说,我们估计平均角频率为\(\:{f}_{0}\)= 0.036 Hz,Brune应力降为Δσ = 4.79 MPa,参考岩点为κ0 = 0.051 s。通过分析近源脉冲样波形,我们证明了我们的模型与近距离观测之间的峰值地面速度(PGV)不匹配是由于破裂指向性效应造成的。最后,我们比较了2023年7.8级地震与2023年7.6级埃尔比斯坦地震以及2020年6.7级西弗里斯地震的地面运动。这三个地震事件的衰减效应估计值在 ~ 0.2 到 6.0 Hz 之间是相同的,在 ~ 5.0 Hz 以上的地点响应略有不同。震源频谱比较表明,所有三个事件的震源特性都很复杂。我们的综合地动分析有助于理解和模拟衰减、场地响应和基于事件的震源特征的区域特性,这对未来特定区域的地震灾害评估非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Comprehensive ground-motion characterization of the 6 February 2023 \(\:{\varvec{M}}_{\varvec{W}}\) 7.8 Pazarcık earthquake in Kahramanmaraş, Türkiye: insights into attenuation effects, site responses and source properties

The devastating \(\:{M}_{W}\) 7.8 Pazarcık earthquake on February 6, 2023, profoundly impacted a large region in south-central Türkiye and northwestern Syria, resulting in over 50,000 casualties and widespread damage. To better understand source properties and wave-propagation effects of this event, we analyze the strong ground-motion data recorded at ~ 230 stations. We determine the regional distance-dependent attenuation using the horizontal RotD50 Fourier acceleration amplitude spectrum (FAS) in the frequency range of 0.1–20 Hz. We find an apparent near-source saturation effect which needs to incorporate an additional finite-fault factor for the distance scaling. Uncertainty and sensitivity analyses are considered by variable decay rates in the geometric spreading model. For each decay rate, we derive a corresponding \(\:Q\left(f\right)\) model to account for the frequency-dependent anelastic attention. Significant duration of ground motions is modelled for two different measurements based on Arias intensity (\(\:{I}_{A}\)). For site amplification, we construct a model containing both \(\:{V}_{S30}\)-scaling and peak ground acceleration (PGA)-scaling. Source parameters are then determined using a reference Fourier source spectrum at 1.0 km. Specifically, we estimate the mean corner-frequency as \(\:{f}_{0}\)= 0.036 Hz, Brune stress drop as Δσ = 4.79 MPa and the reference rock site κ0 = 0.051 s. By analyzing near-source pulse-like waveforms, we demonstrate that the mismatch of peak ground velocity (PGV) between our model and close-distance observations is due to the rupture directivity effect. Finally, we compare ground motions of the 2023 \(\:{M}_{W}\) 7.8 event to those of the 2023 \(\:{M}_{W}\) 7.6 Elbistan and the 2020 \(\:{M}_{W}\) 6.7 Sivrice earthquakes. Attenuation effects estimated for the three events are found to be identical between ~ 0.2 and 6.0 Hz, with slight differences in site responses above ~ 5.0 Hz. Source spectra comparisons indicate that the source properties are complicated for all three events. Our comprehensive ground-motion analyses contribute to understanding and modeling regional properties of attenuation, site response, and event-based source characteristics that are important for future region-specific seismic hazard assessment.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Bulletin of Earthquake Engineering
Bulletin of Earthquake Engineering 工程技术-地球科学综合
CiteScore
8.90
自引率
19.60%
发文量
263
审稿时长
7.5 months
期刊介绍: Bulletin of Earthquake Engineering presents original, peer-reviewed papers on research related to the broad spectrum of earthquake engineering. The journal offers a forum for presentation and discussion of such matters as European damaging earthquakes, new developments in earthquake regulations, and national policies applied after major seismic events, including strengthening of existing buildings. Coverage includes seismic hazard studies and methods for mitigation of risk; earthquake source mechanism and strong motion characterization and their use for engineering applications; geological and geotechnical site conditions under earthquake excitations; cyclic behavior of soils; analysis and design of earth structures and foundations under seismic conditions; zonation and microzonation methodologies; earthquake scenarios and vulnerability assessments; earthquake codes and improvements, and much more. This is the Official Publication of the European Association for Earthquake Engineering.
期刊最新文献
Towards seismic risk reduction of critical facilities combining earthquake early warning and structural monitoring: a demonstration study Seismic evaluation and comparison of ground motion characteristics in Kahramanmaras and Hatay provinces following the 2023 Pazarcik-Elbistan Earthquake sequences Using image-based inspection data to improve response predictions of earthquake-damaged unreinforced masonry buildings Experimental cyclic testing of masonry pier-spandrel substructures reinforced with engineered cementitious composites overlay Influence of opening shape, size and position on the ultimate strength, stiffness and energy dissipation of confined brick masonry walls
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1