Pub Date : 2023-11-28DOI: 10.1080/10168664.2023.2283212
Dr Thiago Cunha da Silva, Maria Elizabeth da Nóbrega Tavares Prof., Rodrigo Bird Burgos Prof.
There exist various methods for computing reactions in reinforced concrete slabs in buildings, but the most precise approaches involve solving differential equations that are challenging to apply, ...
计算建筑物中钢筋混凝土板的反应存在多种方法，但最精确的方法涉及求解微分方程，这具有挑战性。
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Pub Date : 2023-11-20DOI: 10.1080/10168664.2023.2260425
Aimin Yuan, Wenguang Zhu, Huimin Lan, Bing Zhang, Guanjun Xu, Yun Pang, Bin Wang
Urban pedestrian bridges should contribute to the improvement of the overall image and function of the place where the footbridge is located. In order to establish a complete pedestrian access area...
城市人行天桥应有助于改善人行天桥所在地区的整体形象和功能。为了建立一个完整的行人通道区域……
{"title":"Design and Performance Evaluation of the Curved Hengjiang Avenue Pedestrian Bridge: Y-shaped Piers and Mixed Decks","authors":"Aimin Yuan, Wenguang Zhu, Huimin Lan, Bing Zhang, Guanjun Xu, Yun Pang, Bin Wang","doi":"10.1080/10168664.2023.2260425","DOIUrl":"https://doi.org/10.1080/10168664.2023.2260425","url":null,"abstract":"Urban pedestrian bridges should contribute to the improvement of the overall image and function of the place where the footbridge is located. In order to establish a complete pedestrian access area...","PeriodicalId":51281,"journal":{"name":"Structural Engineering International","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138503912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-10DOI: 10.1080/10168664.2023.2273464
Sotiria Stefanidou, Olga Markogiannaki, Ioannis Mikes, Michalis Fragiadakis
AbstractBridges are key parts of transportation networks and hence, their post-hazard condition is vital for the recovery of the regions affected by natural hazards. However, the fact that they are often subjected to more than one destructive natural hazard during their life span resulting in accumulated damage that may influence their capacity has attracted relatively little research interest, while almost no design standards take it into consideration. The multiple hazard events may be successive single events, separated by considerable time intervals (e.g. an earthquake followed by a flood event), combined or cascading multiple-hazard events (e.g, landslide after an earthquake), or even simultaneous events. The main objective of this study is to propose an effective framework for the development of multiple-hazard fragility curves of bridges considering the effect of subsequent events and taking into account different possible damage scenarios of the bridge critical components, i.e. piers, bearings and the abutment-backfill systems. In this framework, the effect of the damage level of the critical components and their interdependence on the fragility assessment for multiple events is examined and compared with the bridge fragility for single events. A pilot case study is also included in the present work, aiming to highlight the effect of the initial damage state on the final fragility estimate of a typical riverine bridge.Keywords: Multi-hazardseismic hazardflood hazardfragilitybridgesubsequent events AcknowledgmentsThe research project was supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “2nd Call for H.F.R.I. Research Projects to support Faculty Members & Researchers” (Project Number: 04140).Disclosure StatementNo potential conflict of interest was reported by the author(s).Data Availability StatementThe data supporting the results of this study are available from the corresponding author upon reasonable request.Additional informationFundingThis work was supported by Hellenic Foundation for Research and Innovation (H.F.R.I): [Grant Number 2nd Call for H.F.R.I. Research Projects to support].
{"title":"Fragility Analysis Framework for Bridges Subjected to Successive Natural Hazards","authors":"Sotiria Stefanidou, Olga Markogiannaki, Ioannis Mikes, Michalis Fragiadakis","doi":"10.1080/10168664.2023.2273464","DOIUrl":"https://doi.org/10.1080/10168664.2023.2273464","url":null,"abstract":"AbstractBridges are key parts of transportation networks and hence, their post-hazard condition is vital for the recovery of the regions affected by natural hazards. However, the fact that they are often subjected to more than one destructive natural hazard during their life span resulting in accumulated damage that may influence their capacity has attracted relatively little research interest, while almost no design standards take it into consideration. The multiple hazard events may be successive single events, separated by considerable time intervals (e.g. an earthquake followed by a flood event), combined or cascading multiple-hazard events (e.g, landslide after an earthquake), or even simultaneous events. The main objective of this study is to propose an effective framework for the development of multiple-hazard fragility curves of bridges considering the effect of subsequent events and taking into account different possible damage scenarios of the bridge critical components, i.e. piers, bearings and the abutment-backfill systems. In this framework, the effect of the damage level of the critical components and their interdependence on the fragility assessment for multiple events is examined and compared with the bridge fragility for single events. A pilot case study is also included in the present work, aiming to highlight the effect of the initial damage state on the final fragility estimate of a typical riverine bridge.Keywords: Multi-hazardseismic hazardflood hazardfragilitybridgesubsequent events AcknowledgmentsThe research project was supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “2nd Call for H.F.R.I. Research Projects to support Faculty Members & Researchers” (Project Number: 04140).Disclosure StatementNo potential conflict of interest was reported by the author(s).Data Availability StatementThe data supporting the results of this study are available from the corresponding author upon reasonable request.Additional informationFundingThis work was supported by Hellenic Foundation for Research and Innovation (H.F.R.I): [Grant Number 2nd Call for H.F.R.I. Research Projects to support].","PeriodicalId":51281,"journal":{"name":"Structural Engineering International","volume":"11 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135138067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.1080/10168664.2023.2258921
Victor Antônio Moreira de Faria, Marcílio Sousa da Rocha Freitas, André Luís Riqueira Brandão
AbstractCold-formed rack profiles are produced mainly for use in industrial storage systems. Their complex geometry and the presence of hole patterns along their length make the strength prevision of these structural elements difficult. This article evaluates the safety presented in the design of rack columns by adaptations of the Direct Strength Method (DSM), the original formulation of which does not address perforations. The safety parameters used here are the reliability indexes, calculated by the First Order Second Moment (FOSM) method, used in the calibration of the AISI S100 current standard, the First Order Reliability Method (FORM) and Monte Carlo Simulation. Only methodologies that applied the reduced thickness method in cross-section modelling produce results close to the target reliability indexes suggested for cold-formed columns. The target indexes are met for all load combinations when only distortional buckling failure is considered. However, the DSM adaptations are still imprecise when considering failure with local buckling. New professional factors were calibrated for these cases, as the design using the current ϕ=0.85 does not meet the safety requirements.Keywords: industrial storage systemsrack columnsdirect strength methodstructural reliabilityreliability indexesresistance factors AcknowledgementsThis study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001. The authors are grateful to the Federal University of Ouro Preto (UFOP) and Professors Teoman Peköz and Miquel Casafont for their suggestions.Disclosure StatementNo potential conflict of interest was reported by the authors.Data Availability StatementThe data that support the findings of this study are available from the corresponding author, V.A.M. de Faria, upon reasonable request.
摘要冷弯机架型材主要用于工业存储系统。它们复杂的几何形状和沿其长度存在的孔图案使得这些结构元件的强度预测变得困难。本文通过直接强度法(DSM)的适应性来评估机架柱设计中的安全性，其原始公式没有解决穿孔问题。这里使用的安全参数是通过一阶二阶矩法(FOSM)计算的可靠性指标，用于AISI S100现行标准的校准，一阶可靠性法(FORM)和蒙特卡罗模拟。只有在截面建模中应用减厚法的方法才能产生接近冷成形柱的目标可靠性指标的结果。仅考虑畸变屈曲破坏时，所有荷载组合均满足目标指标。然而，当考虑到局部屈曲破坏时，DSM调整仍然不精确。由于使用电流φ =0.85的设计不符合安全要求，因此针对这些情况校准了新的专业因素。关键词:工业存储系统机架柱直接强度法结构可靠度可靠度指标阻力因子致谢本研究部分由巴西国家协调机构(CAPES)财政代码001资助。作者感谢欧鲁普雷图联邦大学(UFOP)和Teoman教授Peköz和Miquel Casafont教授提出的建议。披露声明作者未报告潜在利益冲突。数据可用性声明支持本研究结果的数据可根据合理要求从通讯作者V.A.M. de Faria处获得。
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Pub Date : 2023-10-26DOI: 10.1080/10168664.2023.2265965
Oscar J. Urbina Leal, Alexander Fekete, Rafael Ramírez Eudave, José C. Matos, Hélder Sousa, Elisabete R. Teixeira
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Pub Date : 2023-10-18DOI: 10.1080/10168664.2023.2251516
Francesca Poli, Francesca Brighenti, Mattia Francesco Bado, Daniele Zonta
AbstractA significant percentage of assets of the Italian national bridge stock have outlived their nominal design service lives, a situation that has led to an increasing number of structural failures over the years, e.g. the deadly 2018 collapse of Morandi Bridge in Genoa. It would have been impossible to replace all existing infrastructural assets, so the focus was shifted to their upkeep. This is commonly achieved through structural health assessments of bridges and through properly planned and prioritized maintenance interventions. For a proper management of their bridge stock, infrastructure managers need a prioritization tool capable of quickly assessing whether a particular unit is in immediate need of maintenance. Currently, the prioritization of each bridge inside a stock is often based on its structural reliability. Yet, whilst several complex and time-consuming structural reliability assessment methodologies exist, these often fail to be quick in application. The present article provides for this shortcoming by introducing a novel simplified structural reliability model. In particular, it provides a framework for the assessment of overload, degradation, seismic, hydraulic and landslide risk factors and a detailed formalization of the most widespread, i.e. overload and degradation. On the basis of such a swift model, infrastructure managers can quickly detect rapidly deteriorating bridges, guarantee well-timed interventions and improve infrastructure user safety.Keywords: structural reliabilitybridge reliabilityrisk assessmentprobability of failurebridge managementmaintenance prioritizationbridge user safety Disclosure StatementNo potential conflict of interest was reported by the authors.Additional informationFundingThis research has been supported also by Ministry of Education University and Research MIUR PON RI 2014-2020 Program (Project MITIGO, ARS01_00964), Consorzio della Rete dei Laboratori Universitari di Ingegneria Sismica e Strutturale ReLUIS Ponti 2021- 2022 ‘Implementation of provisions of DM 578/2020', and DPC-ReLUIS 2022-2024 ‘Monitoring and satellite data’.
意大利国家桥梁库存的很大一部分资产已经超过了其名义设计使用寿命，这种情况导致多年来越来越多的结构故障，例如2018年热那亚莫兰迪大桥的致命坍塌。替换所有现有的基础设施资产是不可能的，因此重点转移到维护上。这通常是通过对桥梁的结构健康评估以及通过适当规划和优先考虑的维护干预措施来实现的。为了适当地管理他们的桥梁库存，基础设施管理人员需要一个能够快速评估某个特定单元是否迫切需要维护的优先级工具。目前，库存中的每个桥梁的优先级通常基于其结构可靠性。然而，虽然存在一些复杂而耗时的结构可靠性评估方法，但这些方法往往不能快速应用。本文通过引入一种新的简化结构可靠性模型来弥补这一缺陷。特别是，它提供了一个评估超载、退化、地震、水力和滑坡危险因素的框架，并详细确定了最普遍的危险因素，即超载和退化。在这种快速模型的基础上，基础设施管理人员可以快速发现快速恶化的桥梁，保证及时干预，提高基础设施用户的安全。关键词:结构可靠性，桥梁可靠性，风险评估，故障概率，桥梁管理，维护优先级，桥梁用户安全披露声明，作者未报告潜在的利益冲突。本研究还得到了教育部，大学和研究MIUR PON RI 2014-2020计划(项目MITIGO, ARS01_00964)，意大利Sismica大学结构ReLUIS Ponti 2021- 2022“DM 578/2020规定的实施”和DPC-ReLUIS 2022-2024“监测和卫星数据”的支持。
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Pub Date : 2023-10-02DOI: 10.1080/10168664.2023.2269018
"The Future of Design (FOD)—Organised by the British Group of IABSE." Structural Engineering International, 33(4), pp. 733–734
“设计的未来(FOD) -由英国IABSE组织。”国际建筑工程，33(4)，pp. 733-734
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Pub Date : 2023-10-02DOI: 10.1080/10168664.2023.2272495
"Interview with Jochen Köhler, Chair, IABSE Task Group 1.6: Benefits for Practical Application of Risk and Reliability Considerations in Structural Engineering." Structural Engineering International, 33(4), pp. 723–724
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Pub Date : 2023-10-02DOI: 10.1080/10168664.2023.2267346
"IABSE National Groups Activity Report." Structural Engineering International, 33(4), pp. 731–732
“IABSE全国团体活动报告。”土木工程学报，33(4)，pp. 731-732
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