悬拉式支撑框架地震倒塌安全性评价

IF 2.6 3区 工程技术 Q2 ENGINEERING, CIVIL Structure and Infrastructure Engineering Pub Date : 2023-10-28 DOI:10.1080/15732479.2023.2265908
Mohammad Ali Mohammad Taghizadeh, Abbas Karamodin
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引用次数: 0

摘要

摘要悬吊式拉链支撑框架是一种可替代倒v型支撑框架以改善其抗震性能的方法,其抗震评估对于确定此类地震系统在剧烈地震中的置信度具有重要意义。这些框架的布置和设计参数在一些文献中有所提及,但没有基于各种倒塌不确定性的倒塌风险概率评估。为了评估倒塌概率和安全边际,设计了18个具有不同几何参数的最严重地震设计类别(Dmax)的悬挂拉链支撑框架。设计的框架在OpenSees软件中建模,考虑了扣板连接的影响,并使用FEMA P695方法进行了超过15,800次动态和非线性静态推覆分析。在评估框架的概率行为时,考虑了完全倒塌不确定性。结果表明:考虑总倒塌不确定度为0.726和0.529时,设计框架的调整倒塌裕度比(ACMR)分别高出验收标准27%和64%。结果还表明,响应修正系数远大于6,可用于长周期悬拉支撑框架的经济设计。关键词:崩溃不确定性增量动态分析概率评估安全边际比率悬架拉链支撑框架披露声明作者声明他们没有已知的竞争经济利益或个人关系可能会影响本文所报道的工作。
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Seismic collapse safety assessment of suspended zipper-braced frames
AbstractSeismic evaluation of suspended zipper-braced frames, which are an alternative to inverted-V-braced frames to improve their seismic behavior, is of greatest significance to determine the level of confidence in this type of seismic system during severe earthquakes. The arrangement and design parameters of these frames are mentioned in some references, but there is no probabilistic assessment of collapse risk based on various collapse uncertainties. To evaluate the probability of collapse and margin of safety, eighteen suspended zipper-braced frames with different geometry parameters in the most severe seismic design category (Dmax) have been designed. The designed frames were modeled in OpenSees software by considering the effect of gusset plate connections and evaluated by performing more than 15,800 dynamic and nonlinear static pushover analyses using FEMA P695 methodology. Total collapse uncertainty is considered in the evaluation of the probabilistic behavior of frames. The results show that the adjusted collapse margin ratio (ACMR) of designed frames by considering the total collapse uncertainty of 0.726 and 0.529 is 27% and 64% higher than the acceptance criteria, respectively. The results also indicate that a response modification coefficient of much more than 6 can be used for the economic design of long-period suspended zipper-braced frames.Keywords: Collapse uncertaintyincremental dynamic analysesprobabilistic evaluationsafety margin ratiosuspended Zipper-Braced frame Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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来源期刊
Structure and Infrastructure Engineering
Structure and Infrastructure Engineering 工程技术-工程:机械
CiteScore
9.50
自引率
8.10%
发文量
131
审稿时长
5.3 months
期刊介绍: Structure and Infrastructure Engineering - Maintenance, Management, Life-Cycle Design and Performance is an international Journal dedicated to recent advances in maintenance, management and life-cycle performance of a wide range of infrastructures, such as: buildings, bridges, dams, railways, underground constructions, offshore platforms, pipelines, naval vessels, ocean structures, nuclear power plants, airplanes and other types of structures including aerospace and automotive structures. The Journal presents research and developments on the most advanced technologies for analyzing, predicting and optimizing infrastructure performance. The main gaps to be filled are those between researchers and practitioners in maintenance, management and life-cycle performance of infrastructure systems, and those between professionals working on different types of infrastructures. To this end, the journal will provide a forum for a broad blend of scientific, technical and practical papers. The journal is endorsed by the International Association for Life-Cycle Civil Engineering ( IALCCE) and the International Association for Bridge Maintenance and Safety ( IABMAS).
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