Developments in the Built Environment最新文献_第9页

Reliability assessment of robustness for reinforced concrete moment resisting frames 钢筋混凝土抗弯矩框架鲁棒性可靠性评价

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100639

Elena Miceli, Diego Gino, Paolo Castaldo

{"title":"Reliability assessment of robustness for reinforced concrete moment resisting frames","authors":"Elena Miceli, Diego Gino, Paolo Castaldo","doi":"10.1016/j.dibe.2025.100639","DOIUrl":"10.1016/j.dibe.2025.100639","url":null,"abstract":"<div><div>A strain-based 5-step procedure is illustrated for the probabilistic robustness assessment of 2D reinforced concrete moment resisting frames. Considering the central column removal as failure scenario, this study compares three frames, including a code-conforming design (<em>frame 1</em>) and two enhanced designs (<em>frame 2</em> and <em>frame 3</em>). For the three frames, non-linear finite-element (NLFE) models have been defined including properly calibrated translational springs. By sampling from materials and loads, 300 displacement-controlled pushdown NLFE global analyses have been conducted to determine energy-based dynamic amplification factors (1.02 - 1.75). Next, 300 probabilistic static-equivalent NLFE global analyses, performed by removing the column and amplifying loads, permitted to monitor the aleatory peak strains in any material and point of the frames. This allowed to compute the failure probabilities with respect to the ultimate limit state. Robustness improvements lead to much lower failure probabilities (10<sup>−7</sup> - 10<sup>−3</sup>) in any element with a reduction of damage propagation.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100639"},"PeriodicalIF":6.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591526","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

Compatibility analysis of FRP-strengthened exterior RC beam-column joints: An advanced analytical model frp加固外部RC梁柱节点的相容性分析：一种先进的分析模型

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100634

Davood Mostofinejad, Mahshid Abdoli

{"title":"Compatibility analysis of FRP-strengthened exterior RC beam-column joints: An advanced analytical model","authors":"Davood Mostofinejad, Mahshid Abdoli","doi":"10.1016/j.dibe.2025.100634","DOIUrl":"10.1016/j.dibe.2025.100634","url":null,"abstract":"<div><div>Exterior reinforced concrete (RC) beam-column joints are critical components that endure complex stress states during seismic events, often requiring retrofitting due to their vulnerability to shear failure and rebar slippage. However, the complex behavior of these joints has led to significant simplifications in design codes, often neglecting crucial issues such as interactions of rebars, FRP, and concrete, considering rebars' extensions and slippages, FRP sheets' elongations, and other effective parameters such as confinement degree of the joint, FRP stress distribution, and the rebars-to-concrete bond degradations due to cyclic loading. This study addresses these limitations by developing an innovative analytical model for fiber-reinforced polymer (FRP) strengthened exterior RC beam-column joints. The proposed model introduces new compatibility conditions and formulations that comprehensively consider the intricate interactions between externally applied FRP sheets, internal reinforcing bars, and concrete surface deformations. Previous research overlooked these key aspects, leading to difficulty in accurately predicting joint deformations. The proposed model is then simplified for practical applications. To assess the proposed model's accuracy, a comprehensive database is compiled from previous studies, followed by a critical comparison between experiments and the model's estimations and comparisons with established codes for FRP strengthening. The proposed model estimates the joints' shear resistance effectively, with a mean value (MV) of 0.94 and a coefficient of variation (COV) of 12%, surpassing existing codes, which have MV values of 0.26–0.72 and COV values of 83%–148%, respectively.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100634"},"PeriodicalIF":6.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534530","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

On the use of recycled polyethylene terephthalate fiber in one-part geopolymer stabilized soft soil: Tensile performance and sustainability analysis 再生聚对苯二甲酸乙二醇酯纤维在单组分地聚合物稳定软土中的应用：拉伸性能和可持续性分析

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100641

Zihan Zhou , Shuo Li , Guo Hu , Jun Wu , Chuanqin Yao , Fujun Niu

{"title":"On the use of recycled polyethylene terephthalate fiber in one-part geopolymer stabilized soft soil: Tensile performance and sustainability analysis","authors":"Zihan Zhou , Shuo Li , Guo Hu , Jun Wu , Chuanqin Yao , Fujun Niu","doi":"10.1016/j.dibe.2025.100641","DOIUrl":"10.1016/j.dibe.2025.100641","url":null,"abstract":"<div><div>Aiming to promote low-carbon transformation of construction materials and waste upcycling solutions, this study adopted one-part geopolymer (OPG) as a sustainable binder for stabilizing soft soil. The recycled polyethylene terephthalate (RPET) fiber was also incorporated to enhance the stabilized soil's tensile strength. The effects of fly ash (FA) content, RPET fiber content and length on the tensile performance of the stabilized soil were investigated to reveal the synergistic mechanism between FA and RPET fiber. Results showed that the FA enhanced fiber-matrix deformation compatibility and improved fiber dispersion through its lubrication effects, significantly boosting the contribution of RPET fibers to the improvement of tensile strength of the stabilized soil. Life cycle assessment indicated that OPG-stabilized soil reduced carbon emissions, energy consumption, and costs by 78%, 58%, and 50% compared to ordinary Portland cement (OPC)-stabilized soil. The findings support <span>OPG</span> and RPET fiber's practical application in eco-friendly ground improvement and waste management.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100641"},"PeriodicalIF":6.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610178","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

Flexural behaviour of a new modular and demountable truss beam with embedded nodes 嵌入节点的新型模块化可拆卸桁架梁的抗弯性能

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100636

Cong Liu , Zihao Wang , Xin Chen , Jian Yuan , Xiaoyong Mao , Guiming Chen , Yong Sun

引用次数: 0

Assessment of impact of bottlenecks on evacuation in subway stations using network analysis 基于网络分析的地铁车站疏散瓶颈影响评估

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100632

Jiwon Jeong , Ilwha Lee , Youngseok Oh , Jeryang Park , Seungjun Ahn

{"title":"Assessment of impact of bottlenecks on evacuation in subway stations using network analysis","authors":"Jiwon Jeong , Ilwha Lee , Youngseok Oh , Jeryang Park , Seungjun Ahn","doi":"10.1016/j.dibe.2025.100632","DOIUrl":"10.1016/j.dibe.2025.100632","url":null,"abstract":"<div><div>In this paper, a novel graph-theory-based analytical framework is introduced, which maps a subway station's spatial configuration into a network model using a space syntax approach. This framework employs Betweenness Centrality (BC) analysis to identify potential bottleneck points in evacuation flows. Various what-if scenarios are tested, including evacuations from the subway station in intact conditions, damaged conditions due to disaster, and improved design for enhanced evacuability. The framework is applied in a case study of Gwanggyo Jungang Station in Korea, which features a typical subway station layout and spatial configuration. Pedestrian simulation models (PSM) are developed and tested for each scenario, allowing for a comparison between the BC analysis results and simulation outcomes. The findings verify the effectiveness of the proposed framework. This integrated approach offers a novel methodical avenue for the quantitative assessment of the evacuability of underground facilities, potentially enhancing subway station designs for better public safety.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100632"},"PeriodicalIF":6.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527367","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

Analysis of influence of seismic impact on evacuability in subway stations 地震对地铁站疏散能力的影响分析

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100637

Mintaek Yoo , Jeongjun Park , Jiwon Jeong , Seungjun Ahn

{"title":"Analysis of influence of seismic impact on evacuability in subway stations","authors":"Mintaek Yoo , Jeongjun Park , Jiwon Jeong , Seungjun Ahn","doi":"10.1016/j.dibe.2025.100637","DOIUrl":"10.1016/j.dibe.2025.100637","url":null,"abstract":"<div><div>Disasters in subway systems pose significant threats to urban safety, particularly as urban transportation increasingly relies on underground public transport networks. This study aims to assess the impacts of seismic events on subway station structures and their evacuation routes, focusing on a human-centric approach to disaster preparedness. Using PLAXIS 2D for dynamic numerical simulations and the Dijkstra Algorithm for evacuation modeling, this research investigates how structural damage from earthquakes affects the evacuability of subway stations. The findings highlight that as earthquake magnitude increases, evacuation routes become significantly more constrained, leading to a sharp rise in evacuation difficulty and potential bottlenecks, thereby exacerbating the risk of casualties. Additionally, the analysis found that structural sections located on softer ground are more susceptible to severe damage, further impeding evacuation efforts. By addressing the practical implications of seismic impacts on evacuation routes, this work provides comprehensive insights into the risks faced by subway station occupants during seismic events. The study offers insights for enhancing emergency response strategies and underscores the necessity for a multidisciplinary approach to disaster preparedness, integrating structural engineering and evacuation route design to ensure the safety and resilience of urban subway systems during emergencies.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100637"},"PeriodicalIF":6.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591525","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

Multi-scale analysis of fire and evacuation drill in a multi-functional university high-rise building 多功能高校高层建筑消防疏散演练多尺度分析

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100626

Yuxin Zhang , Yifei Ding , Mohcine Chraibi , Xinyan Huang

{"title":"Multi-scale analysis of fire and evacuation drill in a multi-functional university high-rise building","authors":"Yuxin Zhang , Yifei Ding , Mohcine Chraibi , Xinyan Huang","doi":"10.1016/j.dibe.2025.100626","DOIUrl":"10.1016/j.dibe.2025.100626","url":null,"abstract":"<div><div>Fire evacuation drills are crucial for familiarizing occupants with building layouts and evacuation procedures. However, organizing a large drill in an educational site is rare due to the cost effort and data limitations. This paper examines a fire drill in a multi-functional university building in Hong Kong with over 800 participants. While capturing every participant's evacuation process was challenging, key location recordings allowed for a detailed analysis of corridors, staircases, and exits. The analysis revealed that nearly 50% of participants delayed responding to fire alarms, with some remaining in their rooms for over four minutes. Furthermore, exits experienced imbalanced utilization rates, and one was over 200% of design capacity, revealing occupants' preference for familiar routes. Additionally, it highlights the importance of fire drills and discusses future roadmap combining advanced techniques. Overall, this study offers valuable data on human behavior during emergencies, supporting the calibration and validation of evacuation models.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100626"},"PeriodicalIF":6.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510244","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

Evaluating the impact of attention shift intervention on human evacuation behavior in virtual environment 虚拟环境中注意力转移干预对人类疏散行为的影响评价

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100642

Junyoung Kim , Jeongjun Park , Changbum Ryan Ahn , Moonseo Park , Yuncheul Woo , Ilhwa Lee

{"title":"Evaluating the impact of attention shift intervention on human evacuation behavior in virtual environment","authors":"Junyoung Kim , Jeongjun Park , Changbum Ryan Ahn , Moonseo Park , Yuncheul Woo , Ilhwa Lee","doi":"10.1016/j.dibe.2025.100642","DOIUrl":"10.1016/j.dibe.2025.100642","url":null,"abstract":"<div><div>Traditional auditory evacuation cues, such as fire alarms, frequently fail to capture individuals' attention, particularly when they are using handheld devices. This study investigates the effectiveness of attention shift interventions delivered via emergency text messages displayed on these devices to improve evacuation responses. Participants in a virtual reality simulation of a metro station were exposed to emergency cues through auditory broadcasts or visual text messages. The findings show that visual attention shift interventions reduce the likelihood of re-engaging in pre-evacuation activities while improving evacuation performance when compared to auditory cues. Continuous visual cues were more effective than auditory cues in keeping attention during evacuation. These results highlight the potential for personalized visual communication to improve emergency response strategies in environments where handheld devices are widely used, providing critical insights into developing more effective emergency communication systems for improved evacuation behavior and overall safety during emergencies.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100642"},"PeriodicalIF":6.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591524","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

Regeneration of borehole fields using residential waste heat from ventilation and sewage 利用通风和污水产生的住宅废热再生井田

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100630

Janne Hirvonen , Santeri Siren , Piia Sormunen

引用次数: 0

Towards a human-centric city emergency response: Modelling activity patterns of urban population 迈向以人为中心的城市应急响应：模拟城市人口的活动模式

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2025-03-01 DOI: 10.1016/j.dibe.2025.100633

Qian-Cheng Wang , Ping He , Yibin Li , Yuting Hou , Yi Izzy Jian , Xuan Liu

引用次数: 0