Journal of building engineering最新文献_第10页

Machine-learning based performance assessment of TMD-equipped buildings subjected to near-field pulse-like ground motions

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-03-20 DOI: 10.1016/j.jobe.2025.112380

Danial Farsijani , Samaneh Gholam , Hassan Karampour , Nima Talebian

{"title":"Machine-learning based performance assessment of TMD-equipped buildings subjected to near-field pulse-like ground motions","authors":"Danial Farsijani , Samaneh Gholam , Hassan Karampour , Nima Talebian","doi":"10.1016/j.jobe.2025.112380","DOIUrl":"10.1016/j.jobe.2025.112380","url":null,"abstract":"<div><div>Tuned mass dampers (TMDs) are widely recognized for improving structural responses under dynamic loads. This study investigates the impact of near-field pulse-like ground motions on the optimal design parameters and performance of TMDs. Utilizing 5, 10, 15, and 20-story building structures subjected to 150 near-field earthquakes, Particle Swarm Optimization (PSO) is employed to minimize the maximum top-story displacement. A Random Forest (RF) model is trained with the optimization results and earthquake features to predict structural responses. To enhance the accuracy of the RF model, Bayesian optimization is utilized to refine input selection and tune its hyperparameters. A parametric analysis is then performed to assess the influence of inputs on the objective function. The findings demonstrate the effectiveness of TMD in mitigating displacement, the robustness of PSO in optimization, and the role of earthquake characteristics in shaping TMD performance. The feature importance assessment highlights the dominant influence of the TMD frequency ratio on displacement reduction with over 40 % contribution. The TMD showed more efficiency in high-frequency structures and during earthquakes with low impulsiveness, high energy levels, and high velocity. Additionally, RF proved capable of simulating the behavior of controlled structures under seismic loads, providing a computationally efficient tool for analyzing the TMD performance.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"105 ","pages":"Article 112380"},"PeriodicalIF":6.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759772","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

Acoustic and thermal performance of an innovative façade constructed with Brazilian plantation wood

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2025-03-20 DOI: 10.1016/j.jobe.2025.112348

Rodrigo Scoczynski Ribeiro, Marc Arnela, Elias Zea, Adrià Pastor Vila, Noélli Nara Andrade Rodrigues, Thalita Giglio, Rafaela Benan Zara, Jorge Daniel de Melo Moura

{"title":"Acoustic and thermal performance of an innovative façade constructed with Brazilian plantation wood","authors":"Rodrigo Scoczynski Ribeiro, Marc Arnela, Elias Zea, Adrià Pastor Vila, Noélli Nara Andrade Rodrigues, Thalita Giglio, Rafaela Benan Zara, Jorge Daniel de Melo Moura","doi":"10.1016/j.jobe.2025.112348","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112348","url":null,"abstract":"The construction industry faces several challenges in adopting sustainable materials for building components. Engineered Wood Products (EWP) are emerging as potential alternatives to traditional materials like hollow clay blocks. This research evaluates an innovative EWP-based façade as a possible replacement for a hollow block wall in terms of acoustic and thermal performance. The study was conducted in a hotel in Guarapuava, Brazil, where acoustical measurements and thermal envelope simulations were performed. The measured Weighted Standardized Façade Level Difference (<mml:math altimg=\"si1.svg\" display=\"inline\"><mml:msub><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mspace width=\"1em\"></mml:mspace><mml:mi>m</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi><mml:mi>T</mml:mi><mml:mo>,</mml:mo><mml:mi>w</mml:mi></mml:mrow></mml:msub></mml:math>) for the existing hollow block façade was 37 dB, while the simulated data for the proposed wood façade reached 42 dB. Indoor sound insulation between rooms also improved, rising from 46 dB (measured) to 48 dB (simulated) with the EWP façade. From a thermal perspective, the thermal resistance increased from 0.50 <mml:math altimg=\"si2.svg\" display=\"inline\"><mml:mrow><mml:msup><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mi>K</mml:mi><mml:mo>/</mml:mo><mml:mi>W</mml:mi></mml:mrow></mml:math> to 1.86 <mml:math altimg=\"si2.svg\" display=\"inline\"><mml:mrow><mml:msup><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mi>K</mml:mi><mml:mo>/</mml:mo><mml:mi>W</mml:mi></mml:mrow></mml:math>, which is more suitable for the Brazilian 1M climate zone where the building is located. This study highlights the potential of using Brazilian pine wood in façade elements.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"57 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678211","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

Seismic load identification for damper-added and base-isolated frame structures using EKF-UI algorithm and data fusion technique

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2025-03-20 DOI: 10.1016/j.jobe.2025.112426

Yang Li, Yanfeng Zheng, Yaozhi Luo, Shuifu Qiu, Lijun Sun

{"title":"Seismic load identification for damper-added and base-isolated frame structures using EKF-UI algorithm and data fusion technique","authors":"Yang Li, Yanfeng Zheng, Yaozhi Luo, Shuifu Qiu, Lijun Sun","doi":"10.1016/j.jobe.2025.112426","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112426","url":null,"abstract":"Timely acquisition of seismic loads is essential for post-earthquake safety assessments and disaster simulations of buildings. This paper proposes an alternative approach to obtain seismic waves by load identification method using structural responses instead of by ground motion sensors. Firstly, formulations are derived separately for both damper-added and base-isolated structures based on the extended Kalman filter algorithm, without prior information of structure or isolator parameters. In addition, displacement, velocity, and strain responses are incorporated to improve the algorithm noise robustness. Multi-rate data fusion is introduced to handle heterogeneous sensor sampling rates. Subsequently, numerical simulations for these two structures validate the feasibility of the proposed method and the contribution of data fusion technique on measurement noise resistance. Finally, a shaking table test performing on a five-floor frame with rubber isolation bearings further demonstrates the effectiveness and accuracy of the proposed identification algorithm for practical application. The focus on fusing supplementary data to mitigate noise for seismic load identification with incomplete measurements highlights the innovations.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"57 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678205","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

AI-driven short-term load forecasting enhanced by clustering in multi-type university buildings: Insights across building types and pandemic phases

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2025-03-19 DOI: 10.1016/j.jobe.2025.112417

Yu-Shin Hu, Kai-Yun Lo, I-Yun Lisa Hsieh

{"title":"AI-driven short-term load forecasting enhanced by clustering in multi-type university buildings: Insights across building types and pandemic phases","authors":"Yu-Shin Hu, Kai-Yun Lo, I-Yun Lisa Hsieh","doi":"10.1016/j.jobe.2025.112417","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112417","url":null,"abstract":"Accurate forecasting of electricity demand is pivotal for optimizing energy management in smart buildings and propelling the advancement towards net-zero goals. However, scalable, accurate, and robust building load prediction models are scarce in educational campuses, whose diverse functions and consumption patterns, resembling large-scale urban environments, are often hindered by data scarcity and lack of cross-building heterogeneity analysis. This study presents an AI-based short-term building load forecasting framework integrating K-means clustering with BiLSTM regression, tailored for various energy consumption patterns across different building types. The model requires no auxiliary variables and is adaptable to both regular operational conditions and disruptions caused by the COVID-19 pandemic. The clustering-enhanced model adeptly identifies unique energy consumption patterns and significantly improves prediction accuracy, with a 3.65 % increase in mean R<ce:sup loc=\"post\">2</ce:sup> and a 55.19 % reduction in standard deviation under normal conditions. During the pandemic, its performance is further amplified, with a 4.90 % increase in mean R<ce:sup loc=\"post\">2</ce:sup> and a 62.41 % reduction in standard deviation, highlighting its robustness. The model shows particularly high accuracy in buildings with consistent energy profiles, such as teaching and research facilities, while it encounters greater challenges in mixed-use and office buildings due to their variable energy patterns. The pandemic underscores the model's limitations in adapting to abrupt operational shifts, signaling a pressing need for future enhancements to incorporate adaptive forecasting techniques. This research substantiates the application of AI in building energy systems, contributing to the development of nearly zero-energy buildings (NZEB) and supporting the transition towards sustainable urban energy systems.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"71 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678212","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 hybrid data-driven Co-simulation approach for enhanced integrations of renewables and thermal storage in building district energy systems

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2025-03-19 DOI: 10.1016/j.jobe.2025.112405

Youssef Elomari, Giorgos Aspetakis, Carles Mateu, Adedamola Shobo, Dieter Boer, M. Marín-Genescà, Qian Wang

{"title":"A hybrid data-driven Co-simulation approach for enhanced integrations of renewables and thermal storage in building district energy systems","authors":"Youssef Elomari, Giorgos Aspetakis, Carles Mateu, Adedamola Shobo, Dieter Boer, M. Marín-Genescà, Qian Wang","doi":"10.1016/j.jobe.2025.112405","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112405","url":null,"abstract":"Increasing the share of renewables is crucial for accelerating the sustainable transitions of modern building and district heating systems. This study develops a hybrid co-simulation framework, integrating a Python-based model with an established district energy system (DES) TRNSYS model, to optimize the design and control of on-site renewables such as photovoltaic panels (PV), solar thermal collectors, a water-to-water heat pump, seasonal thermal storage, a domestic hot water tank, and auxiliary heaters. The methodology combines diverse simulation tools and data-driven control sequences, enabling interaction across system components for enhanced energy efficiency and performance. The findings indicate that the optimized framework reduces net present cost by approximately 14 % and environmental impacts by 11 %. The data-driven controls further minimized temperature deviations significantly better than traditional Rule-Based Controls, achieving nearly optimal comfort levels with minimal environmental impact. The developed co-simulation enhances energy efficiency and intelligent controls in building applications, minimizes environmental impacts, and effectively covers the energy demand in building and districts (building clusters). These findings highlight the essential role of advanced hybrid co-simulation frameworks in improving DH system design and control, emphasizing their potential for sustainable urban energy transitions.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"59 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678215","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

Enhanced acid resistance of geopolymer containing recycled masonry wastes as high-volume replacement of natural sand

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-03-19 DOI: 10.1016/j.jobe.2025.112396

Tom Damion, Prabhath Ranjan Kumar Soda, Souradeep Gupta

{"title":"Enhanced acid resistance of geopolymer containing recycled masonry wastes as high-volume replacement of natural sand","authors":"Tom Damion, Prabhath Ranjan Kumar Soda, Souradeep Gupta","doi":"10.1016/j.jobe.2025.112396","DOIUrl":"10.1016/j.jobe.2025.112396","url":null,"abstract":"<div><div>Masonry construction and demolition (C&D) wastes contribute about a third of the three billion tonnes C&D wastes generated globally each year. The masonry C&D wastes contain a substantial fraction of clay (from bricks and tiles), which may be alkali-activated and used to replace natural sand to develop acid-resistant geopolymers. This research investigates the sulfuric acid (pH of 0.50) resistance of NaOH-activated geopolymer containing blast furnace slag, fly ash, and recycled brick powder (RBP), where RBP has been used to replace 25 % (RBP25 0.70) and 75 % (RBP75 0.80) of natural sand respectively. The experimental findings demonstrate that the addition of 75 % RBP reduces the mass loss of geopolymer by 2 %, while offering a 42 % higher compressive strength compared to the corresponding control (Control 0.80, prepared at the same solution-to-binder ratio) after 4 weeks of sulfuric acid exposure. The reduced mass loss and better compressive strength due to RBP addition are linked to 5 % lower permeable porosity and 60 % lower volume of small and medium capillary pores (10–100 nm size) compared to Control 0.80. Furthermore, due to the presence of calcium-based compounds (calcium carbonates and other hydration products), RBP possesses acid neutralization capacity by enabling gypsum formation, thus forming a barrier for further acid penetration and protecting the attack on geopolymer gels. The alkali-activation of RBP yields additional geopolymer gel and Iron-chabazite micro-crystals, which further densify the interfacial zones and the bulk matrix. In summary, the findings from this research provide a means to develop “greener” geopolymer mixes that have lower demand for natural sand and enhanced resistance to acid attack.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"105 ","pages":"Article 112396"},"PeriodicalIF":6.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715825","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

Study of olive pomace bottom ashes as a sustainable alkaline activator in the syntesis of geopolymers

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2025-03-19 DOI: 10.1016/j.jobe.2025.112383

Elena Picazo Camilo, Raul Carrillo Beltrán, Juan José Valenzuela Expósito, Griselda Elisabeth Perea Toledo, Fco Antonio Corpas Iglesias

{"title":"Study of olive pomace bottom ashes as a sustainable alkaline activator in the syntesis of geopolymers","authors":"Elena Picazo Camilo, Raul Carrillo Beltrán, Juan José Valenzuela Expósito, Griselda Elisabeth Perea Toledo, Fco Antonio Corpas Iglesias","doi":"10.1016/j.jobe.2025.112383","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112383","url":null,"abstract":"The increase of the cogeneration industry in Spain due to the policies to promote sustainable energies has produced an accumulation of ash in landfills that cause an environmental impact. The research focuses on the re-use of olive pomace bottom ashes (OPBA), a kind of bottom biomass ashes (BBA), as a sustainable alkaline activator for the replacement of NaOH and partial replacement of Na<ce:inf loc=\"post\">2</ce:inf>SiO<ce:inf loc=\"post\">3</ce:inf>. As precursor material, chamotte (CH) was used to valorize wastes from the ceramic industry considering different Na<ce:inf loc=\"post\">2</ce:inf>SiO<ce:inf loc=\"post\">3</ce:inf>/OPBA ratios (1.0, 1.2, 1.3, 1.5, 1.8, 2.1, 5.0). Ceramic and power generation wastes were physical and chemically characterized, and novel geopolymers were subjected to physical and mechanical tests. The results obtained showed that the enrichment of OPBA gives rise to physical and mechanical properties comparable to those of cementitious materials. Values of 26.46 MPa were obtained after 24 h of curing at 85± 5 °C and 27 days at ambient temperature with OPBA substitution ratios of 30 %. Therefore, it is important to highlight the feasibility of alkaline activated geopolymers with biomass ashes and ceramic wastes as a precursor material in the manufacture of mortars, reducing waste and emissions and promoting the circular economy due to the manufacture of sustainable products.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"96 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678219","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

Experimental investigation on thermal performance of phase change plates used in hot and humid environment with ventilation

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2025-03-19 DOI: 10.1016/j.jobe.2025.112420

Xiang Li, Zujing Zhang, Ruiyong Mao, Xing Liang, Jiri Zhou, Hongwei Wu

{"title":"Experimental investigation on thermal performance of phase change plates used in hot and humid environment with ventilation","authors":"Xiang Li, Zujing Zhang, Ruiyong Mao, Xing Liang, Jiri Zhou, Hongwei Wu","doi":"10.1016/j.jobe.2025.112420","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112420","url":null,"abstract":"The underground refuge chamber (URC) serves as a refuge for human beings in the event of a mining disaster. However, due to the URC's power outage during such an event, the conventional air conditioning system is not applicable. As individuals and equipment expel heat and humidity, the temperature and humidity levels within the URC will progressively increase. This paper investigates the thermal behavior of phase change plates (PCP) in the context of ventilation conditions characterized by elevated temperatures, humidity levels, and ventilation rates. The study provides a comprehensive reference for the application of PCP in URC and experimental investigation into the effects of PCP thickness, environmental temperature, ventilation flow-rate, and relative humidity on the heat transfer performance of PCP. Results show that: (Ⅰ) PCP with a thickness of 60–70 mm can be cooled for up to 96 h in a URC environment. (Ⅱ) Ventilation flow-rate, environment temperature, and humidity all increase heat transfer, but too high temperature and relative humidity will increase the formation of condensate and thus increase the effect of condensate on heat transfer, and too high wind speed will hinder the formation of condensate and thus reduce the effect of condensate on heat transfer. (Ⅲ) With the increase of ventilation flow-rate and temperature, the heat transfer coefficient increases by about 5.05 W/m<ce:sup loc=\"post\">2</ce:sup> and 4.47 W/m<ce:sup loc=\"post\">2</ce:sup>.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"61 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678214","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

An empirical study estimating train-induced airflow rate and its effect on the cooling load of underground stations

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-03-19 DOI: 10.1016/j.jobe.2025.112413

Yanzhe Yu , Shijun You , Huan Zhang , Shen Wei , Tianqi Liu , Xingguo Guo , Na Luo , Wenhua Chen

{"title":"An empirical study estimating train-induced airflow rate and its effect on the cooling load of underground stations","authors":"Yanzhe Yu , Shijun You , Huan Zhang , Shen Wei , Tianqi Liu , Xingguo Guo , Na Luo , Wenhua Chen","doi":"10.1016/j.jobe.2025.112413","DOIUrl":"10.1016/j.jobe.2025.112413","url":null,"abstract":"<div><div>Train-induced airflows (TIA) have a considerable effect on the thermal environment and the cooling of underground metro stations (UMSs). However, few studies have specifically examined the relationship between the train arrival time interval and TIA's pattern, as well as the effect of TIA on the actual cooling load of UMSs. Therefore, this study aims to investigate the impact of TIA on the actual cooling load of UMSs using comprehensive measurements, which were designed to investigate the volume of TIA caused by the arrival time interval and the corresponding calculation method. The results showed that the real-time airflow pattern of the TIA was closely related to the arrival time interval. At measured stations, the flow rate curve of the superposition of airflows can be approximated into two types of waveforms according to three arrival time intervals, one is the waveform with a single peak and trough, and the other one is the waveform with double peaks and troughs, which presents more waveforms than previous simulation studies. Moreover, this study presents an improved algorithm for calculating the cooling load caused by TIA and proves its reliability using the tested data. According to the analysis, the cooling load caused by outdoor air volume occupied a larger proportion of the total load than that of tunnel air volume. The influence of air infiltration on the cooling load can be seriously underestimated when an engineering algorithm is used. This study provides reference data for ascertaining the characteristics of TIA and the operation optimization of underground station cooling systems.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"105 ","pages":"Article 112413"},"PeriodicalIF":6.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706429","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

Coupled effects of the internal and external heat sources on flame spread behaviors over wires in a real building fire scenario

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-03-19 DOI: 10.1016/j.jobe.2025.112416

Changwei Li , Ying Zhang , Kaixuan Tang , Dachao Yuan

{"title":"Coupled effects of the internal and external heat sources on flame spread behaviors over wires in a real building fire scenario","authors":"Changwei Li , Ying Zhang , Kaixuan Tang , Dachao Yuan","doi":"10.1016/j.jobe.2025.112416","DOIUrl":"10.1016/j.jobe.2025.112416","url":null,"abstract":"<div><div>Electrical fires are a major cause of building fires. In real fire scenarios, the combined effects of internal Joule heating and external radiation are crucial in determining flame spread and dripping behavior in electrical wires. To investigate wire flame behavior under the combined influence of internal and external heat sources, experiments were conducted using current generators and radiation panels. The results indicated that, under external radiation, the balance temperature increased proportionally to the square of the current, which led to an increase in flame spread rate and droplet frequency. External radiation also significantly accelerated the flame spread rate. When only internal Joule heating was applied, droplet mass was measured to develop a predictive model for droplet frequency, which was then validated by experimental data. External radiation increased both the length and flow rate of the flame, resulting in a significant decrease in wire flame height. It was found that radiation and current had nearly equal effects on flame spread and dripping behavior. As a result, wire flame behavior remained consistent, regardless of the heating direction. Understanding the interaction between internal and external heat sources is crucial for enhancing building fire safety and reducing the incidence of electrical fires.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"105 ","pages":"Article 112416"},"PeriodicalIF":6.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715899","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