Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings
Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings
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DOI：
10.1061/(asce)st.1943-541x.0000648
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
Thomas M. Frankie;B. Gencturk;A. Elnashai
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文献类型：
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作者：
Thomas M. Frankie;B. Gencturk;A. Elnashai
无加固砌体（URM）结构代表了美国中部和东部住宅建筑存量的重要部分。在受新马德里地震带影响的八个州中，15%的房屋是URM建筑。URM建筑的脆性进一步支持了对地震反应的全面考虑，因为它们对严重破坏模式的敏感性。目前，迫切需要基于分析的URM建筑易损性曲线。为了通过开发基于仿真的URM脆弱性来提高对损伤状态概率的估计，对推覆分析进行了广泛的文献调查。利用这些数据生成容量曲线，并据此定义损坏性能极限状态。使用代表美国中部和东部的综合推导的加速度图来模拟需求。采用先进的容量谱法对结构响应进行了评价。因此，通过分析得出能力、需求和反应，并利用它们生成一组更可靠、更统一的脆弱性曲线，用于损失评估软件。本文提出了一个框架，可以快速，灵活地更新，与适当的研究数据库，能够产生曲线代表任何URM建筑类型受到特定的危害。曲线以多种形式表示，以证明在各种损失评估应用中的使用能力。DOI: 10.1061 /(第3期)。1943 - 541 x.0000648。©2013美国土木工程师学会。CE数据库主题标题：砌体；地震的影响;住宅建筑。作者关键词：砌体；脆弱的关系;地震易损性;损失评估;容量谱法；HAZUS。
Unreinforced masonry (URM) structures represent a significant portion of the residential building stock of the central and eastern United States. Fifteen percent of homes in the eight-state region impacted by the New Madrid Seismic Zone are URM buildings. The brittle nature of URM buildings further supports a thorough consideration of seismic response given the susceptibility to severe failure modes. Cur- rently, there is a pressing need for analytically based fragility curves for URM buildings. To improve the estimation of damage-state probabil- ities through the development of simulation-based URM fragilities, an extensive literature survey is conducted on pushover analysis. Using these data, capacity curves are generated, from which damage performance limit states are defined. Demand is simulated using synthetically derivedaccelerogramsrepresentativeofthecentralandeasternUnitedStates.Structuralresponseisevaluatedusinganadvancedcapacityspec- trum method. Capacity, demand, and response are thus derived analytically and utilized to generate a more reliable and uniform set of fragility curves for use in loss-assessment software. This paper presents a framework amenable to rapid, flexible updating that, with the appropriate database of studies, is capable of producing curves representative of any URM building typology subjected to a specified hazard. The curves are expressed in multiple forms to demonstrate capability of use in various loss-assessment applications. DOI: 10.1061/(ASCE)ST.1943- 541X.0000648. © 2013 American Society of Civil Engineers. CE Database subject headings: Masonry; Seismic effects; Residential buildings. Author keywords: Masonry; Fragility relationships; Seismic vulnerability; Loss assessment; Capacity spectrum method; HAZUS.