Bulletin of Earthquake Engineering最新文献

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Fragility curves of URM buildings in aggregate considering the interaction with soil and among nearby footings 考虑土与地基相互作用的URM建筑整体脆性曲线
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-26 DOI: 10.1007/s10518-025-02178-x
E. Zeolla, A. Brunelli, F. de Silva, S. Cattari, S. Sica
{"title":"Fragility curves of URM buildings in aggregate considering the interaction with soil and among nearby footings","authors":"E. Zeolla,&nbsp;A. Brunelli,&nbsp;F. de Silva,&nbsp;S. Cattari,&nbsp;S. Sica","doi":"10.1007/s10518-025-02178-x","DOIUrl":"10.1007/s10518-025-02178-x","url":null,"abstract":"<div><p>The paper examines unreinforced masonry (URM) buildings, which are common in small historic centres around the world. These buildings are often constructed in aggregate, a configuration that not only results in significant structural interaction but also interaction with and through the foundation soil. The seismic performance of an aggregate can be influenced by foundation-soil-foundation interaction (FSFI), in addition to standard soil-foundation-structure interaction (SFSI) and site effects (SE). While reliable and time-efficient approaches are available in the literature to address all these issues for standalone buildings, buildings in aggregate are frequently modelled as isolated and fixed at their base, particularly when developing fragility curves. This paper investigates the effects of SFSI and FSFI on the period and damping ratio estimates of typical URM buildings. Specifically, it examines the impact of SE, SFSI, and FSFI on the fragility curves of two aggregated URM buildings. These latter are representative of Visso, a town heavily affected by the 2016–2017 Central Italy earthquake, known for site amplification phenomena due to soft soils. Fragility curves were developed through nonlinear dynamic analyses of equivalent 3D frame models of the two archetypes, analysed under both fixed and compliant base conditions. In the latter scenario, the structural model is equipped with springs at its base, with stiffness first calibrated to account for SFSI effects and subsequently adjusted to include the additional FSFI contribution. The results indicate a higher fragility in the fixed-base model. Specifically, the ratio of the median values of the fragility curves for the compliant base model to the fixed-base model ranges from 20 to 60%. Finally, the results from the cross-interacting models exhibited slightly higher values than those considering only SFSI, suggesting a moderate impact from the additional contribution of footing-footing interaction, at least for the case studies examined.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 9","pages":"3589 - 3622"},"PeriodicalIF":4.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10518-025-02178-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seismic microzonation; past, present and future 地震microzonation;过去,现在和未来
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-26 DOI: 10.1007/s10518-025-02182-1
Atilla Ansal
{"title":"Seismic microzonation; past, present and future","authors":"Atilla Ansal","doi":"10.1007/s10518-025-02182-1","DOIUrl":"10.1007/s10518-025-02182-1","url":null,"abstract":"<div><p>The purpose of seismic microzonation has always been to estimate earthquake ground motion characteristics on the ground surface based on available geological, seismological and geotechnical data. During the early years, mostly geological data and observations from past earthquakes were used to prepare microzonation maps. In more recent years, regional earthquake hazard studies, geotechnical investigations, and site response analysis became more common. The uncertainties in source characteristics, soil profile, soil properties, and the characteristics of the building inventory can be considered as critical issues associated with these analyses. In the first stage, the probabilistic distribution of the related earthquake parameters on the ground surface may be determined considering all possible input acceleration time histories, site profiles, and dynamic soil properties. Generally, to account for the variability in earthquake source and path effects it is suggested to use more than 20 acceleration records compatible with the site-dependent earthquake hazard. Likewise, more or equal to 100 soil profiles generated by Monte Carlo simulations may be used to account for the variability of site conditions. Then the seismic microzonation in a specific area may be based on the probabilistic assessment of these factors in site response analysis. An attempt will be made to briefly review the past, present and possibilities for future studies on microzonation applications.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 9","pages":"3483 - 3506"},"PeriodicalIF":4.1,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10518-025-02182-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seismic strengthening of existing brick masonry with CRM coatings on one side 现有砖砌体一侧用CRM涂层进行抗震加固
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-20 DOI: 10.1007/s10518-025-02181-2
Natalino Gattesco, Emanuele Rizzi, Ingrid Boem, Allen Dudine, Matija Gams
{"title":"Seismic strengthening of existing brick masonry with CRM coatings on one side","authors":"Natalino Gattesco,&nbsp;Emanuele Rizzi,&nbsp;Ingrid Boem,&nbsp;Allen Dudine,&nbsp;Matija Gams","doi":"10.1007/s10518-025-02181-2","DOIUrl":"10.1007/s10518-025-02181-2","url":null,"abstract":"<div><p>A Composite-Reinforced Mortar (CRM) designed for the seismic strengthening of existing single or double-leaf brick masonry walls on one side only is presented and extensively tested through experiments. The benefit of the proposed strengthening method is that it does not require temporary relocation of residents. The existing single and double-leaf solid brick masonry used in the research is typical throughout Europe. The CRM coating consisted in a natural hydraulic lime mortar coating with a nominal thickness of 30 mm, reinforced with a Glass Fiber-Reinforced Polymer (GFRP) mesh applied to the wall using GFRP transverse connectors and steel injected transverse connectors for double-leaf brick masonry. Cyclic in-plane shear compression tests and out-of-plane cyclic tests were carried out on 250 mm thick full-scale masonry walls. The results demonstrated that the single-sided coating effectively enhanced the resistance, deformation capacity and dissipated energy under seismic loads, despite existing design models tending to underestimate the shear capacity to some extent.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 9","pages":"3779 - 3808"},"PeriodicalIF":4.1,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10518-025-02181-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of shear wall opening and reinforcement around opening on the structural strengthening 剪力墙开口及开口周围配筋对结构加固的影响
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-16 DOI: 10.1007/s10518-025-02180-3
Taha Yasin Altiok, Kabil Cetin, Ali Demir
{"title":"Effect of shear wall opening and reinforcement around opening on the structural strengthening","authors":"Taha Yasin Altiok,&nbsp;Kabil Cetin,&nbsp;Ali Demir","doi":"10.1007/s10518-025-02180-3","DOIUrl":"10.1007/s10518-025-02180-3","url":null,"abstract":"<div><p>A common method for strengthening structures with low lateral stiffness is to add cast-in-place shear walls within a reinforced concrete (RC) frame. However, shear wall openings may be unavoidable in strengthening works due to architectural and installation requirements. In this study, the effect of the shear wall on structural strengthening was investigated by considering the cases with and without openings. A total of four inadequate RC frames (1/3 scale, single-story, single-span), reflecting common deficiencies observed in earthquake-damaged structures, were produced as part of the study. One of these frames was selected as a reference specimen and was not strengthened, while the others were strengthened with RC shear walls with and without openings. In one of the shear walls with an opening, special reinforcement details around the opening specified in the Turkish Building Earthquake Code (TBEC-2018) were applied and the effects of these reinforcements on the structural behavior were investigated. All specimens were tested under repeated and reversible loads simulating an earthquake. The experimental results were evaluated in terms of structural behavior parameters. The shear wall without opening increased the lateral load capacity by approximately 40% compared to the unstrengthened specimen. The application of TBEC-2018-compliant reinforcement around the opening improved the capacity by 16% relative to the unreinforced opening case. Initial stiffness increased by 35.3% with the use of opening reinforcement. Specimens without openings dissipated more energy in the plastic region, while opening reinforcement contributed positively up to peak load. Ductility decreased with the presence of openings, but improved with reinforcement.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 8","pages":"3421 - 3449"},"PeriodicalIF":4.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10518-025-02180-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural performance of symmetric and asymmetric plan irregular building structures: A comparative analysis of conventional and grid slab systems 对称与非对称平面不规则建筑结构的结构性能:常规与栅格板体系的比较分析
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-12 DOI: 10.1007/s10518-025-02179-w
Samrat Poudel, Tek Raj Gyawali
{"title":"Structural performance of symmetric and asymmetric plan irregular building structures: A comparative analysis of conventional and grid slab systems","authors":"Samrat Poudel,&nbsp;Tek Raj Gyawali","doi":"10.1007/s10518-025-02179-w","DOIUrl":"10.1007/s10518-025-02179-w","url":null,"abstract":"<div><p>Rapid urbanization and increasingly complex building designs have led to a rise in structural irregularities, significantly affecting seismic performance. Plan irregularities often induce torsional effects, placing additional stress on structural elements. Slabs play a crucial role in load distribution and stability, particularly in irregular buildings where conventional slabs may not be optimal. Grid slabs, known for their lightweight structure and efficient load transfer, offer a promising solution for enhancing seismic resilience. However, limited research has explored their interaction with irregular building configurations. This study investigates the seismic performance of grid slabs in buildings with varying symmetries, including symmetric, single-axis symmetric, and asymmetric structures. Numerical simulations under dynamic loading conditions were conducted to assess the impact of different grid slab configurations on deflection, shell stresses, interstorey displacement, drift, and torsional irregularities. The findings reveal that optimized grid slab configurations can significantly reduce slab deflections and improve overall seismic performance, particularly in asymmetric buildings. While grid slabs enhance seismic resilience, symmetric buildings inherently offer better structural balance due to their uniform stiffness and load distribution. These insights contribute to the efficient design of earthquake-resistant structures with complex geometries.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 8","pages":"3395 - 3420"},"PeriodicalIF":4.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143069","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 the Durrës station seismic record (ΜW=6.4, 26/11/2019) by means of structural damage assessment 利用结构损伤评估方法对Durrës台站地震记录(ΜW=6.4, 26/11/2019)进行评价
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-09 DOI: 10.1007/s10518-025-02173-2
Sotiria Stefanidou, Dimitrios Sotiriadis, Nikolaos Klimis, Basil Margaris, Nikolaos Theodoulidis, Anastasios Sextos
{"title":"Evaluation of the Durrës station seismic record (ΜW=6.4, 26/11/2019) by means of structural damage assessment","authors":"Sotiria Stefanidou,&nbsp;Dimitrios Sotiriadis,&nbsp;Nikolaos Klimis,&nbsp;Basil Margaris,&nbsp;Nikolaos Theodoulidis,&nbsp;Anastasios Sextos","doi":"10.1007/s10518-025-02173-2","DOIUrl":"10.1007/s10518-025-02173-2","url":null,"abstract":"<div><p>Recent earthquakes have highlighted the importance of earthquake ground motion recordings and rapid visual inspections (RVSs) of damaged buildings to assess the earthquake impact on the building inventory, prepare recovery plans, and provide valuable findings that could contribute to the preparedness ahead of future earthquake events. The effect of strong earthquake ground motions on the building stock is controlled by a range of interconnected factors. These include the intensity of ground motion, the effects of local soil conditions, the structural design, reinforcement and material properties, as well as the quality control during construction, among others. However, it is important to acknowledge that the earthquake ground motions recorded are dependent on local variables, such as the soil type and potential operational issues. Such an example is the major M6.4 earthquake in Durrës, Albania, in November 2019, the most significant in the region in the past four decades. The strong ground motion recorded at the sole Durrës accelerometric station was interrupted due to a power outage. As a result, the recorded accelerograms (with a PGA of 0.192 g) require thorough analysis and evaluation before they can be reliably used in assessing damage of existing structures. The current paper presents a framework for evaluating the incomplete record to ensure that the strong ground motion pulse is captured in the acceleration series. The latter is achieved by analyzing and comparing the amplitude and frequency contents of the recorded motion against ground motion accelerograms from areas with similar seismotectonic features. Ground motion recordings from stations that have soil conditions resembling those of the Durrës region are used, ensuring that the analysis is relevant to the specific study area. Next, the disrupted ground motion recording is evaluated by comparing the damage of post-earthquake inspected buildings with the results of advanced numerical analysis for the case of a typical 12-storey and a 5-storey building. The effects of pounding, the presence of infills, soil-structure interaction (SSI), and multiple failure modes are taken into consideration. Results indicate that despite the incomplete data, the seismic record retains the essential strong ground motion features and can be used for further studies. The numerical simulations aligned well with observed damage from rapid visual inspections, verifying the record’s integrity. The findings show that factors such as soil-structure interaction, infill panels, and pounding effects significantly influenced building performance. The study concludes that the Durrës record, though incomplete, is reliable for seismic assessment and can aid future risk studies in the region.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 8","pages":"3141 - 3171"},"PeriodicalIF":4.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145143078","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 generalized method for evaluating immediate post-earthquake losses of buildings from different perspectives 一种从不同角度评估建筑物震后即时损失的广义方法
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-07 DOI: 10.1007/s10518-025-02176-z
Shuang Li, Binbin Hu, Changhai Zhai, Paloma Pineda
{"title":"A generalized method for evaluating immediate post-earthquake losses of buildings from different perspectives","authors":"Shuang Li,&nbsp;Binbin Hu,&nbsp;Changhai Zhai,&nbsp;Paloma Pineda","doi":"10.1007/s10518-025-02176-z","DOIUrl":"10.1007/s10518-025-02176-z","url":null,"abstract":"<div><p>The evaluation of immediate post-earthquake losses of buildings is crucial for advancing resilience-based seismic design. To facilitate the development of resilient buildings, a generalized method suitable for any occupancy type of building is proposed to evaluate immediate post-earthquake losses of buildings from engineering, economic, and social perspectives. A functional composition diagram of the building story is constructed, and the story functionality is quantified by using the hierarchical belief rule base inference method based on the evidential reasoning algorithm. The functional composition diagram incorporates the service status of utility systems, such as power, water, communication, heating, and drainage networks, to reflect their impact on the story functionality. Intra-story damage relevance and inter-story functionality relevance of the building are also considered in the functional loss evaluation. To evaluate direct economic loss, two methods for calculating the repair cost ratio are proposed. The choice of method hinges on the level of detail available. Direct social loss is quantified in terms of the casualty ratio, with considerations for the varying impacts of different casualty severity levels on society. Applying this generalized method to a teaching building, the results show that the functional loss is more severe compared to the direct economic and social losses. From the perspective of resilience-based seismic design, it is essential to focus on mitigating functional losses of buildings. This method can provide guidance for pre-earthquake strengthening efforts and post-earthquake recovery strategies for buildings and contribute to advancing resilience-based seismic design.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 9","pages":"3711 - 3743"},"PeriodicalIF":4.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162923","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
Urban seismic risk assessment and loss estimation for Hanoi City 河内市城市地震风险评估及损失估计
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-06 DOI: 10.1007/s10518-025-02172-3
Hong Phuong Nguyen, The Truyen Pham, Tien Hung Nguyen, Cong Que Bui
{"title":"Urban seismic risk assessment and loss estimation for Hanoi City","authors":"Hong Phuong Nguyen,&nbsp;The Truyen Pham,&nbsp;Tien Hung Nguyen,&nbsp;Cong Que Bui","doi":"10.1007/s10518-025-02172-3","DOIUrl":"10.1007/s10518-025-02172-3","url":null,"abstract":"<div><p>In this paper, the HAZUS-MH’s methodology is modified to estimate building damage and human loss due to earthquakes in five downtown districts of Hanoi city. The main modifications include: (1) applying the HAZUS-MH building classification to the housing data in Hanoi; (2) customizing the HAZUS-MH population exposure model, taking into account the behavioral norms of the Hanoi urban community; and (3) applying spatial analysis techniques in a GIS environment to calculate the number of casualties inside the buildings destroyed by the earthquake. The ground shaking ability in Hanoi region was assessed using both deterministic and probabilistic approaches. A digitized building database and the last updated 2019 census data of Hanoi city were used for loss estimation. The results of building damage estimates show that slight and moderate damage states account for the highest proportion, but do not exceed 30%. The temporal distribution of casualties in the study area represents a general rule for all casualty levels, that is, the number of casualties decreases over the hours from 2:00 a.m., 2:00 p.m. to 5:00 p.m. By prioritizing Vietnamese standards and tailoring the population exposure model to local conditions, the customized methodology offers numerous advantages when applied to Hanoi and other urban areas in Vietnam. The results of this study also demonstrate the feasibility of conducting earthquake risk assessments in an urban area like Hanoi, which has never been affected by earthquakes, and in a country with low seismic activity like Vietnam.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 8","pages":"3109 - 3140"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142392","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 numerical model database for seismic retrofitting of existing RC structures towards urban renewal 城市更新中既有钢筋混凝土结构抗震加固的数值模型数据库
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-06 DOI: 10.1007/s10518-025-02170-5
Yi Li, Xu-Yang Cao, De-Cheng Feng
{"title":"A numerical model database for seismic retrofitting of existing RC structures towards urban renewal","authors":"Yi Li,&nbsp;Xu-Yang Cao,&nbsp;De-Cheng Feng","doi":"10.1007/s10518-025-02170-5","DOIUrl":"10.1007/s10518-025-02170-5","url":null,"abstract":"<div><p>Urban buildings face increasingly prominent issues of decreased seismic performance due to the combined effects of environmental factors and disasters over time. Structural retrofitting provides a reasonable and effective approach to improving the seismic capacity of existing buildings. Given the growing stock of existing buildings and the rising demand for retrofitting, this paper develops a numerical model database using the OpenSEES platform to rapidly assess the seismic performance of buildings after retrofitting. The model database includes numerical simulation methods for four local retrofitting techniques, namely the section enlarging method, concrete replacing method, steel encasing method, and fiber-reinforced polymer wrapping method, as well as numerical simulation methods for four global retrofitting techniques, namely steel brace retrofitting, energy dissipation retrofitting, seismic isolation retrofitting, and external sub-structure retrofitting, all of which are commonly used to enhance the performance of reinforced concrete buildings. The proposed model database was applied in case studies of a 5-story and an 8-story reinforced concrete office building, where various retrofitting techniques were analyzed and compared for their effectiveness in improving structural performance, demonstrating the utility of the model database. The present study can provide valuable guidance for developing reasonable retrofitting strategies for reinforced concrete buildings in practical engineering applications.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 8","pages":"3295 - 3325"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142387","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
Strong ground-motion spectral statistical properties of the East Anatolian Fault region, Türkiye: heterogeneous attenuation, stress drop, and site variations 东安纳托利亚断裂带强地震动谱统计特性:非均质衰减、应力降和场地变化
IF 4.1 2区 工程技术
Bulletin of Earthquake Engineering Pub Date : 2025-05-06 DOI: 10.1007/s10518-025-02175-0
Lei Fu, Kelin Chen, Xiaojun Li
{"title":"Strong ground-motion spectral statistical properties of the East Anatolian Fault region, Türkiye: heterogeneous attenuation, stress drop, and site variations","authors":"Lei Fu,&nbsp;Kelin Chen,&nbsp;Xiaojun Li","doi":"10.1007/s10518-025-02175-0","DOIUrl":"10.1007/s10518-025-02175-0","url":null,"abstract":"<div><p>This study analyzes the ground-motion characteristics of the East Anatolian Fault (EAF) and its adjacent regions, using a dataset comprising 7,972 horizontal and vertical accelerograms from 415 small-to-moderate earthquakes recorded at 170 strong motion stations between 2018 and 2024. This process is implemented by the generalized inversion technique (GIT) combined with the diffuse field concept (DFC). To reduce the GIT uncertainty, we consider the site effect of the outcrop bedrock and the spatial heterogeneity of the path attenuation. First, significant variations in geometric attenuation across the EAF region are observed at different frequencies with increasing distance. The greatest attenuation follows the <i>R</i><sup>−1</sup>, while the smallest attenuation shows almost no reduction. The quality factor <i>Q</i><sub>s</sub> exhibits significant spatial heterogeneity, primarily due to the influence of late Cenozoic volcanic regions, with an average value of 145 <i>f</i><sup>0.96</sup>. Next, we decompose the source spectra and site effects from the path-corrected records. The degree of high-frequency decay in the non-parametric source spectra increases with earthquake magnitude. The stress drop ranges from 0.35 to 50.8 MPa. The stress drop exhibits a slight positive dependence on magnitude and focal depth. The site effect in the EAF region demonstrates moderate amplification at frequencies exceeding 7 Hz. At frequencies below 2 Hz, a maximum horizontal amplification of 6 times is observed, specifically at the northwestern end of the EAF. Additionally, a maximum vertical amplification of 3 times occurs around 1 Hz at this same location. The fundamental site period (<i>T</i><sub>0</sub>) in the region ranges from 0.07 to 1.91 s. Horizontal near-surface attenuation (κ<sub>0H</sub>) varies from 0.0106 to 0.0777 s, while vertical near-surface attenuation (κ<sub>0V</sub>) ranges from 0.0102 to 0.0838 s. Spatially, both <i>T</i><sub>0</sub> and κ<sub>0V</sub> are inversely correlated with <i>V</i><sub>s30</sub>, while the correlation between κ<sub>0H</sub> and <i>V</i><sub>s30</sub> is weaker.</p></div>","PeriodicalId":9364,"journal":{"name":"Bulletin of Earthquake Engineering","volume":"23 8","pages":"3239 - 3267"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142446","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
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