Earthquake Spectra最新文献_第8页

Analytical fragility relation for buried cast iron pipelines with lead-caulked joints based on machine learning algorithms 基于机器学习算法的含铅埋地铸铁管道脆性关系分析

2区工程技术

Earthquake Spectra Pub Date : 2023-11-10 DOI: 10.1177/87552930231209195

Ning Zhao, Dian-Qing Li, Shi-Xiang Gu, Wenqi Du

{"title":"Analytical fragility relation for buried cast iron pipelines with lead-caulked joints based on machine learning algorithms","authors":"Ning Zhao, Dian-Qing Li, Shi-Xiang Gu, Wenqi Du","doi":"10.1177/87552930231209195","DOIUrl":"https://doi.org/10.1177/87552930231209195","url":null,"abstract":"A new numerical-based fragility relation for cast iron (CI) pipelines with lead-caulked joints subjected to seismic body-wave propagation is proposed in this article. Two-dimensional 1600-m-length finite element models for pipelines buried in sand are developed in OpenSees. Parametric analysis is performed to investigate the influence of various parameters on the damage estimates of the buried pipelines. Numerical analyses are conducted to estimate the repair rates ( RR) for CI pipelines subjected to wave propagation. The predictive model for RR is thus developed based on the numerical results and the Gaussian Process Regression approach. The model developed employs four predictor variables, namely, the peak particle velocity and wave propagation velocity along axial direction, the maximum soil shear force per unit length, and the outer diameter of pipelines, exhibiting desirable performance in terms of predictive efficiency and generalization. The performance of the developed relation is compared to several existing fragility relations. The new fragility relation can be used to estimate RR for CI pipelines with lead-caulked joints with outer diameters ranging from 169 to 1554 mm subjected to seismic body-wave propagation.","PeriodicalId":11392,"journal":{"name":"Earthquake Spectra","volume":"103 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135136828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Subsurface imaging dataset acquired at the Garner Valley Downhole Array site using a dense network of three-component nodal stations 利用密集的三分量节点站网络，在加纳谷井下阵列站点获取地下成像数据集

2区工程技术

Earthquake Spectra Pub Date : 2023-11-10 DOI: 10.1177/87552930231209734

Joseph P Vantassel, Jodie A Crocker, Brady R Cox, Khiem Tran

{"title":"Subsurface imaging dataset acquired at the Garner Valley Downhole Array site using a dense network of three-component nodal stations","authors":"Joseph P Vantassel, Jodie A Crocker, Brady R Cox, Khiem Tran","doi":"10.1177/87552930231209734","DOIUrl":"https://doi.org/10.1177/87552930231209734","url":null,"abstract":"There is a growing need to characterize the engineering material properties of the shallow subsurface in three dimensions for advanced engineering analyses. However, imaging the near-surface in three dimensions at spatial resolutions required for such purposes remains in its infancy and requires further study before it can be adopted into practice. To enable and accelerate research in this area, we present a large subsurface imaging data set acquired using a dense network of three-component (3C) nodal stations acquired in 2019 at the Garner Valley Downhole Array (GVDA) site. Acquisition of this data set involved the deployment of 196 stations positioned on a 14 × 14 grid with a 5 m spacing. The array was used to acquire active-source data generated by a vibroseis truck and an instrumented sledgehammer, and passive-wavefield data containing ambient noise. The active-source acquisition included 66 vibroseis and 209 instrumented sledgehammer source locations. Multiple source impacts were recorded at each source location to enable stacking of the recorded signals. The active-source recordings are provided in terms of both raw, uncorrected units of counts and corrected engineering units of meters per second. For each source impact, the force output from the vibroseis or instrumented sledgehammer was recorded and is provided in both raw counts and engineering units of kilonewtons. The passive-wavefield data include 28 h of ambient noise recorded over two nighttime deployments. The data set is shown to be useful for active-source and passive-wavefield three-dimensional imaging and other subsurface characterization techniques, which include horizontal-to-vertical spectral ratios (HVSRs), multichannel analysis of surface waves (MASW), and microtremor array measurements (MAM).","PeriodicalId":11392,"journal":{"name":"Earthquake Spectra","volume":"101 44","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135136418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A database and empirical model for earthquake post-loss amplification 地震后损失放大的数据库和经验模型

2区工程技术

Earthquake Spectra Pub Date : 2023-11-10 DOI: 10.1177/87552930231207822

Maria Camila Hoyos, Vitor Silva

引用次数: 0

Bayesian analysis of ground motion models using chimney fragility curves: 2021, 5.9-Mw Woods Point intraplate earthquake, Victoria, Australia 使用烟囱易损性曲线的地面运动模型贝叶斯分析:2021年，5.9 mw Woods Point板内地震，澳大利亚维多利亚州

2区工程技术

Earthquake Spectra Pub Date : 2023-11-02 DOI: 10.1177/87552930231206399

James La Greca, Mark Quigley, Jaroslav Vaculik, Peter Rayner, Trevor Allen

{"title":"Bayesian analysis of ground motion models using chimney fragility curves: 2021, 5.9-Mw Woods Point intraplate earthquake, Victoria, Australia","authors":"James La Greca, Mark Quigley, Jaroslav Vaculik, Peter Rayner, Trevor Allen","doi":"10.1177/87552930231206399","DOIUrl":"https://doi.org/10.1177/87552930231206399","url":null,"abstract":"The 22 September 2021 (AEST) MW 5.9 Woods Point earthquake occurred in an intraplate setting (southeast Australia) approximately 130 km East Northeast of the central business district of Melbourne (pop. ∼5.15 million). A lack of seismic instrumentation and a low population density in the epicentral region resulted in a dearth of near-source instrumental and “felt” report intensity data, limiting evaluation of the near-source performance of ground motion models (GMMs). To address this challenge, we first surveyed unreinforced masonry chimneys following the earthquake to establish damage states and develop fragility curves. Using Bayesian inference, and including pre-earthquake GMM weightings as Bayesian priors, we evaluate the relative performance of GMMs in predicting chimney observations for different fragility functions and seismic velocity profiles. At the most likely VS30 (760 m/s), the best performing models are AB06, A12, and CY08SWISS. GMMs that were preferentially selected for utility in the Australian National Seismic Hazard Model (NSHA18) prior to the Woods Point earthquake outperform other GMMs. The recently developed NGA-East GMM performs relatively well in the more distal region (e.g. >50 km) but is among the poorest performing GMMs in the near-source region across the range of VS30. Our new method of combining analysis of engineered features (chimneys) with Bayesian inference to evaluate the near-source performance of GMMs may have applicability in diverse settings worldwide, particularly in areas of sparse seismic instrumentation.","PeriodicalId":11392,"journal":{"name":"Earthquake Spectra","volume":"16 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Updating proxy-based site amplification map with in-situ data in Osaka, Japan: A Bayesian scheme based on uncertainty projected mapping 基于不确定性投影制图的贝叶斯方案更新日本大阪地区基于代理的站点放大地图

2区工程技术

Earthquake Spectra Pub Date : 2023-11-02 DOI: 10.1177/87552930231207110

Anirban Chakraborty, Hiroyuki Goto, Sumio Sawada

{"title":"Updating proxy-based site amplification map with in-situ data in Osaka, Japan: A Bayesian scheme based on uncertainty projected mapping","authors":"Anirban Chakraborty, Hiroyuki Goto, Sumio Sawada","doi":"10.1177/87552930231207110","DOIUrl":"https://doi.org/10.1177/87552930231207110","url":null,"abstract":"Site amplification maps are mostly proxy-based. Often due to the absence of in-situ data at the regional or local scale, a high level of confidence cannot be assigned to the site amplifications. It has often been observed that the in-situ amplifications differ from proxy-based estimates. So, whenever new in-situ data are made available, it is necessary to update the proxy-based estimates. Bayesian frameworks are recently gaining attention as model updating schemes. This study proposes a Bayesian scheme for updating proxy-based maps with in-situ data. This scheme is based on uncertainty projected mapping (UPM), where the significance of local in-situ data variability determines the posterior estimates. The study area is in Osaka, Japan, where discrepancies in proxy-based estimates and observed ground motions were documented during the 2018 Northern Osaka earthquake. Dense borehole data from the Kansai Geo-informatics Network are available in this area. Peak ground velocity (PGV) site amplification evaluations from this dense borehole network are used as likelihoods to update the prior proxy-based Japan seismic hazard information system (J-SHIS) site amplification map. As a result, the posterior map shows updated site amplification estimates which better represent the in-situ data. The updated site amplification map is then used to investigate the role of site amplification in explaining the building damage during the 2018 Northern Osaka earthquake.","PeriodicalId":11392,"journal":{"name":"Earthquake Spectra","volume":"11 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135936350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A model for partially dependent component damage fragilities in seismic risk analysis 地震危险性分析中部分相关构件损伤易损性模型

2区工程技术

Earthquake Spectra Pub Date : 2023-10-31 DOI: 10.1177/87552930231205790

Jack W Baker, Ed Almeter, Dustin Cook, Abbie B Liel, Curt Haselton

引用次数: 0

An offshore non-ergodic ground motion model for subduction earthquakes in Japan Trench area 日本海沟地区近海俯冲地震的非遍历地震动模型

2区工程技术

Earthquake Spectra Pub Date : 2023-10-28 DOI: 10.1177/87552930231207118

Lei Hu, Yingmin Li, Shuyan Ji

{"title":"An offshore non-ergodic ground motion model for subduction earthquakes in Japan Trench area","authors":"Lei Hu, Yingmin Li, Shuyan Ji","doi":"10.1177/87552930231207118","DOIUrl":"https://doi.org/10.1177/87552930231207118","url":null,"abstract":"With the improvement of the world’s largest seafloor observation network (S-net) and the increase in the quantity and quality of records, the ergodic assumptions can be further relaxed in the modeling of offshore ground motion models (GMMs). This allows accounting for systematic and repeatable source, site, and path effects to further understand the characteristics of offshore ground motion in the Japan Trench region. We developed an offshore ergodic backbone GMM for subduction earthquakes and classified the sites into four categories using horizontal–vertical response spectral ratio to investigate site amplification. The offshore ergodic GMM is applicable for subduction earthquake scenarios with moment magnitudes ranging from 4.0 to 7.4 and rupture distances ranging from 10 to 300 km. Comparing offshore ergodic GMMs with onshore GMMs for subduction earthquakes, we found that offshore GMMs were significantly different from onshore GMMs, especially in the long-period and unburied states. Then a new offshore non-ergodic GMM was developed based on the offshore ergodic GMM. The systematic and repeatable source and site effects were captured by the spatially varying coefficients represented by Gaussian processes, while the systematic and repeatable path effects were captured by cell-specific anelastic attenuation proposed by Dawood and Rodriguez-Marek (2013), calculated with the Cohen-Sutherland computer graphics algorithm. The non-ergodic GMM revealed systematic and repeatable source, site, and path effects that were not captured by the ergodic GMM. Moreover, the non-ergodic GMM showed reduced aleatory variability and epistemic uncertainty on ground motion estimation compared to ergodic GMM. The reduction of aleatory variability and epistemic uncertainty had a significant impact on probabilistic seismic hazard analysis. Quantifications of these results are contributed to conduct reasonable seismic design and seismic risk assessment for marine engineering in offshore regions vulnerable to strong subduction earthquakes.","PeriodicalId":11392,"journal":{"name":"Earthquake Spectra","volume":"92 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136161039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of case-based reasoning to estimate liquefaction manifestation 基于案例推理评估液化表现

2区工程技术

Earthquake Spectra Pub Date : 2023-10-28 DOI: 10.1177/87552930231203573

Brian Carlton, Mertcan Geyin, Harun Kursat Engin

引用次数: 0

Cold-formed steel framed shear wall test database 冷弯型钢框架剪力墙试验数据库

2区工程技术

Earthquake Spectra Pub Date : 2023-10-28 DOI: 10.1177/87552930231202974

Zhidong Zhang, Mohammed M Eladly, Colin A Rogers, Benjamin W Schafer

引用次数: 0

Engineering validation of BB-SPEEDset, a data set of near-source physics-based simulated accelerograms BB-SPEEDset的工程验证，这是一个基于近源物理的模拟加速度数据集

2区工程技术

Earthquake Spectra Pub Date : 2023-10-25 DOI: 10.1177/87552930231206766

Chiara Smerzini, Chiara Amendola, Roberto Paolucci, Arsalan Bazrafshan

{"title":"Engineering validation of BB-SPEEDset, a data set of near-source physics-based simulated accelerograms","authors":"Chiara Smerzini, Chiara Amendola, Roberto Paolucci, Arsalan Bazrafshan","doi":"10.1177/87552930231206766","DOIUrl":"https://doi.org/10.1177/87552930231206766","url":null,"abstract":"Physics-based numerical simulations (PBS) have progressed to the level of providing a realistic description of earthquake ground motion and of its variability, both in time and space, thus enabling to fill the knowledge gaps due to the sparsity of recordings (especially in the near-source region of strong earthquakes). Nevertheless, to build confidence in the utilization of the PBS by the engineering community, simulated accelerograms need to be validated against recorded data from both seismological and engineering perspectives. This article aims at extending the validation of BB-SPEEDset, a data set of near-source broadband simulated accelerograms from multiple regions and faulting styles, obtained by the spectral element computer code SPEED. In addition to seismological checks of BB-SPEEDset proving the absence of systematic biases with respect to a near-source records data set, in this work, the validation is addressed in terms of engineering demand parameters (EDPs) of elastoplastic single-degree-of-freedom systems, taking advantage of a ground motion selection tool including simulated accelerograms. It is found that, when simulated and recorded accelerograms are selected according to the same spectral compatibility criteria, consistent statistical distributions of EDPs are obtained from the two sets. To highlight the potentialities of BB-SPEEDset for near-source analyses, an example of utilization of spectrum-compatible pulse-like motions for structural inelastic analyses is also given, resulting in a good agreement with literature solutions in terms of inelastic displacement demands.","PeriodicalId":11392,"journal":{"name":"Earthquake Spectra","volume":"1 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135113688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0