Developments in the Built Environment最新文献_第6页

Design and validation of a selective binding 3D printer for bio-based construction materials 设计并验证用于生物基建筑材料的选择性结合 3D 打印机

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-17 DOI: 10.1016/j.dibe.2024.100579

Valentine Danché, Mamma Bouaouich, Abdeslam Benamara, Alexandre Pierre, Khadim Ndiaye, T.T. Ngo

{"title":"Design and validation of a selective binding 3D printer for bio-based construction materials","authors":"Valentine Danché, Mamma Bouaouich, Abdeslam Benamara, Alexandre Pierre, Khadim Ndiaye, T.T. Ngo","doi":"10.1016/j.dibe.2024.100579","DOIUrl":"10.1016/j.dibe.2024.100579","url":null,"abstract":"<div><div>We aim to address that home-made design and assembly can be effective to investigate several sizes and natures of construction materials. This study offers a new design that accepts different powder and bio-based materials to enhance the functionality of construction elements. We developed a system in which a numerical controlled machine is coupled with a 6 axis articulated-arm to selectively bind a mineral powder bed with liquid’s droplets. A home-made frame has been designed and built to adapt the geometrical space that allows the displacement of the numerical controlled machine and the articulated arm. The powder deposition is carried out using a tank controlled by an Arduino board. In parallel, we propose a fluid deposition system using a pressurized tank and a valve jetting that allows the deposition of millimetric liquid droplet. 3D printing tests using cement particles, water retention agent, and a composite of cement with hemp aggregates were carried out to validate the prototype. We then highlight, as a proof of concept, that an innovative selective binding 3D printer could bring new composites or biobased materials in construction industry.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100579"},"PeriodicalIF":6.2,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719758","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

Exploring the compositional effect of eco-friendly ultra-high performance concrete on dynamic strength based on stacking algorithm and explainable artificial intelligence 基于堆叠算法和可解释人工智能探索环保型超高性能混凝土的组成对动态强度的影响

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-17 DOI: 10.1016/j.dibe.2024.100574

L.L. Wu , D.L. Zou , Y.F. Hao

{"title":"Exploring the compositional effect of eco-friendly ultra-high performance concrete on dynamic strength based on stacking algorithm and explainable artificial intelligence","authors":"L.L. Wu , D.L. Zou , Y.F. Hao","doi":"10.1016/j.dibe.2024.100574","DOIUrl":"10.1016/j.dibe.2024.100574","url":null,"abstract":"<div><div>This study proposes a two-layer fusion model (stacking-CARF) to predict the dynamic compressive strength of eco-friendly ultra-high performance concrete (UHPC). Before building the prediction model, a well-balanced UHPC dynamic compression dataset is created using the anomaly detection algorithm. Subsequently, it is experimentally determined that the stacking-CARF model consisting of categorical boosting, random forest and linear regression outperforms other prominent ensemble learning and stacked models, and can be used as a robust strength prediction tool. Moreover, Explainable Artificial Intelligence is utilized to elucidate the intricate relationship between material proportions and dynamic compressive strength from both global and local perspectives, offering insights challenging to quantify using traditional methods. In particular, the interaction analysis affirms the role of reasonable replacement ratios between cement and supplementary cementitious materials in enhancing sustainability and cleaner production practices. Finally, a Python-based graphical user interface is developed to facilitate the implementation of the stacking-CARF model in engineering applications.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100574"},"PeriodicalIF":6.2,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705903","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

Improving properties of Portland cement-blast furnace slag blended paste through sodium bicarbonate-induced carbonation 通过碳酸氢钠诱导碳化改善波特兰水泥-高炉矿渣混合浆料的性能

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-17 DOI: 10.1016/j.dibe.2024.100575

Melaku N. Seifu , Daeik Jang , G.M. Kim , Solmoi Park

{"title":"Improving properties of Portland cement-blast furnace slag blended paste through sodium bicarbonate-induced carbonation","authors":"Melaku N. Seifu , Daeik Jang , G.M. Kim , Solmoi Park","doi":"10.1016/j.dibe.2024.100575","DOIUrl":"10.1016/j.dibe.2024.100575","url":null,"abstract":"<div><div>The addition of NaHCO<sub>3</sub> has the potential to enhance properties of concrete by facilitating internal carbonation. This study investigates the effects of the incorporation of NaHCO<sub>3</sub> into ordinary Portland cement-blast furnace slag paste. The results show that the addition of NaHCO<sub>3</sub> had an impact on the hydration process and increased the heat of hydration on all the slag samples. NaHCO<sub>3</sub> caused internal carbonation and facilitated the formation of calcium carbonate and different carbon-based AFm phases, such as monocarbonate. The incorporation of NaHCO<sub>3</sub> improved the pore structure of the paste and enhanced resistance against chloride penetration. The chloride migration coefficient of the Portland cement paste sample was reduced up to 96.5% with the incorporation of 2% NaHCO<sub>3</sub> at 70% slag replacement. The compressive strength of the samples also showed an improvement with 1% NaHCO<sub>3</sub> addition increasing the early age strength and 2% NaHCO<sub>3</sub> addition increasing the matured age strength.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100575"},"PeriodicalIF":6.2,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719759","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

Twinning the path of digital building permits and digital building logbooks – Diagnosis and challenges 数字建筑许可和数字建筑日志的孪生之路--诊断与挑战

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-17 DOI: 10.1016/j.dibe.2024.100573

Pedro Mêda , Judith Fauth , Christian Schranz , Hipólito Sousa , Harald Urban

{"title":"Twinning the path of digital building permits and digital building logbooks – Diagnosis and challenges","authors":"Pedro Mêda , Judith Fauth , Christian Schranz , Hipólito Sousa , Harald Urban","doi":"10.1016/j.dibe.2024.100573","DOIUrl":"10.1016/j.dibe.2024.100573","url":null,"abstract":"<div><div>In the context of the European Union's push for a sustainable and digitally integrated construction sector, this research explores the relationship between Digital Building Permits (DBP) and Digital Building Logbooks (DBL). The study aims to diagnose and identify the synergies and challenges in aligning these data-driven concepts throughout the building life-cycle. Using a focus group methodology, the research gathered qualitative data on the perceptions of DBP and DBL among professionals with diverse backgrounds. The findings reveal significant overlaps and potential for integrated data management, enhancing regulatory compliance, efficiency, and sustainability. While DBP and DBL can function independently, their full potential is realised through a cohesive framework that supports continuous data updates and stakeholder collaboration, facilitating the “golden thread<strong>”</strong> of information essential for effective digital twin applications. Future research should further explore the detailed processes and data exchanges necessary to implement this framework successfully.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100573"},"PeriodicalIF":6.2,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705906","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

Examining the global warming potential of hempcrete in the United States: A cradle-to-gate life cycle assessment 研究美国大麻混凝土的全球变暖潜力：从摇篮到大门的生命周期评估

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-16 DOI: 10.1016/j.dibe.2024.100572

Sejal Sanjay Shanbhag , Manish K. Dixit , Petros Sideris

{"title":"Examining the global warming potential of hempcrete in the United States: A cradle-to-gate life cycle assessment","authors":"Sejal Sanjay Shanbhag , Manish K. Dixit , Petros Sideris","doi":"10.1016/j.dibe.2024.100572","DOIUrl":"10.1016/j.dibe.2024.100572","url":null,"abstract":"<div><div>In the United States reducing greenhouse gas emissions associated with building construction by 90% by 2050 necessitates significant measures to be undertaken within the construction industry. Such measures include advanced construction techniques and bio-based material solutions such as hempcrete. This paper explores the mix design development and environmental impact assessment of hempcrete with an aim of reducing embodied impacts and achieving carbon negativity. Hempcrete being increasingly incorporated into both conventional and cutting-edge construction methods such as large-scale 3D printing is recognized as a carbon-negative material due to sequestered carbon in its constituent materials. Particularly, with the high carbon footprint associated with traditional Portland cement concrete, hempcrete presents a viable and low-carbon or even carbon-negative option for emerging construction techniques. The degree to which hempcrete achieves carbon negativity is contingent upon the proportion of hemp and lime within the mix design. Consequently, a comprehensive Life Cycle Assessment (LCA) is essential for evaluating the carbon-reduction potential of hempcrete. This study conducts a cradle-to-gate LCA of various hempcrete mix designs including a hybrid LCA of the environmental impact of domestically cultivated hemp. The results show that the global warming potential (GWP) of industrial hemp is −1.72 kgCO<sub>2</sub>e/kg. The LCA of different mix designs reveals that carbon negativity is reached when the hempcrete composition includes no less than 20% hemp by weight. Moreover, findings underscore the importance of including lime's carbon absorption in calculations to attain carbon negativity as incorporation of hemp alone may not be adequate. The study concludes that optimizing the constituents of hempcrete to achieve carbon negativity is vital for effective climate mitigation and adaptation strategies.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100572"},"PeriodicalIF":6.2,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719755","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

Study on the pore structure of eco-regenerated mortar using corn cob based on nuclear magnetic resonance 基于核磁共振的玉米芯生态再生砂浆孔隙结构研究

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-08 DOI: 10.1016/j.dibe.2024.100571

Zhou Zhang, Chaolin Wang, Yu Zhao, Kun Zhang, Mingxuan Shen

{"title":"Study on the pore structure of eco-regenerated mortar using corn cob based on nuclear magnetic resonance","authors":"Zhou Zhang, Chaolin Wang, Yu Zhao, Kun Zhang, Mingxuan Shen","doi":"10.1016/j.dibe.2024.100571","DOIUrl":"10.1016/j.dibe.2024.100571","url":null,"abstract":"<div><div>This study aims to investigate the influence of corn cob particles on pore structure of mortar. By using NMR technology, the pore parameters of fast-hardening sulfoaluminate cement mortar (SAC) and ordinary Portland cement mortar (PO) were measured and compared. The influence of corncob particles on the mechanical properties of eco-mortar was evaluated by uniaxial compression test. The results indicate that medium and large pores of both SAC and PO increases with corn cob particle, as well as the porosity. The fractal dimensions of harmful and multiple harmful pores are negatively correlated with the volume fraction of corn cob particles. The addition of corn cob particles reduced the overall fractal dimension of the mortar and decreased the complexity of internal pores. The probability density function of grayscale values transitions from being “thin and tall” to “short and wide”, with an increasing proportion of high grayscale values. This leads to an increase in the proportion of large pores within the mortar, resulting in a continuous deterioration of pore structure. The addition of corn cob particles greatly reduces the strength of SAC and PO, but the peak stress of SAC is higher than that of PO. When corn cob particle content is 30 wt% and 50 wt%, the peak stress of SAC is increased by 23.37% and 14.25%, respectively, compared with the peak stress of PO.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100571"},"PeriodicalIF":6.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654254","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

Innovative design and sensing performance of a novel large-strain sensor for prestressed FRP plates 用于预应力玻璃钢板的新型大应变传感器的创新设计和传感性能

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-05 DOI: 10.1016/j.dibe.2024.100567

Changyuan Liu , Xin Wang , Xinquan Chang , Zhishen Wu , Huang Huang , Mohammad Noori , Wael A. Altabey

{"title":"Innovative design and sensing performance of a novel large-strain sensor for prestressed FRP plates","authors":"Changyuan Liu , Xin Wang , Xinquan Chang , Zhishen Wu , Huang Huang , Mohammad Noori , Wael A. Altabey","doi":"10.1016/j.dibe.2024.100567","DOIUrl":"10.1016/j.dibe.2024.100567","url":null,"abstract":"<div><div>Owing to the low measuring range of traditional fiber Bragg grating (FBG) sensors and the complexity, imprecision, and lack of practicality in existing large-strain sensors, this paper introduces a novel type of large-strain sensor based on pre-relaxation and continuous sensing technology. This design aims to realize the whole-process strain monitoring of prestressed fiber reinforced polymer (FRP) plates. Static tensile tests were conducted on 9 large-strain sensor specimens. The effects of pre-relaxation degree, section number, pre-tension time, and prestressing level were evaluated. The results reveal that, the pre-relaxed sensor, proved its efficacy in capturing the strain pertinent to the post-tensioned operational state of the FRP plate, and a sensing performance of up to 18,923 με can be facilitated and further extended by a pre-relaxation and continuous sensing technique. Moreover, it is recommended that during the fabrication of the large-strain sensor, two pre-tensions be applied, with a prestressing level between 115% and 125% of the pre-relaxation degree.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100567"},"PeriodicalIF":6.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654253","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

Urban heat islands' effects on the thermo-energy performance of buildings according to their socio-economic factors 城市热岛根据社会经济因素对建筑物热能性能的影响

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-04 DOI: 10.1016/j.dibe.2024.100566

Rafael E. López-Guerrero , Konstantin Verichev , Juan Pablo Cárdenas-Ramírez , Manuel Carpio

{"title":"Urban heat islands' effects on the thermo-energy performance of buildings according to their socio-economic factors","authors":"Rafael E. López-Guerrero , Konstantin Verichev , Juan Pablo Cárdenas-Ramírez , Manuel Carpio","doi":"10.1016/j.dibe.2024.100566","DOIUrl":"10.1016/j.dibe.2024.100566","url":null,"abstract":"<div><div>Urban areas experience the urban heat island (UHI) effect, which affects the thermal comfort and energy consumption of buildings. These consequences could vary depending on the socio-economic status of the neighbourhoods. Few studies have investigated how UHI affects socio-economically contrasting districts in thermal comfort and energy performance. Therefore, the primary goal of this research is to evaluate and compare the energy efficiency and thermal comfort conditions of residential buildings in the same city (Temuco, Chile) but located in socio-economically contrasting neighbourhoods. Urban weather files were first modelled in four urban zones using UWG software. Also, EnergyPlus building simulations were conducted to evaluate discomfort hours in adaptive comfort models and energy performance. The results showed annual average UHI intensities between 1.5 and 2.5 K. Urban–rural cooling energy load differences ranged between 12.47% and 38.92%, while heating energy load differences ranged between −20.47% and −81.95%. These distinctions depended on the urban zone, residence model analysed, or energy building standard applied. Similarly, urban-rural differences in thermal comfort times varied from 0.5% to 100%. Results illustrate that the risk of overheating could increase in socio-economically vulnerable areas. This issue could worsen if urban segregation continues to generate poor urban design in low-income districts.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100566"},"PeriodicalIF":6.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705902","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

Effects of superabsorbent polymer and natural zeolite on shrinkage, mechanical properties, and porosity in ultra-high performance concretes 超吸收聚合物和天然沸石对超高性能混凝土收缩率、机械性能和孔隙率的影响

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-02 DOI: 10.1016/j.dibe.2024.100568

Yuxiang Tan , Bo Li , Yung-Tsang Chen , Yifeng Ling , Weizhuo Shi

{"title":"Effects of superabsorbent polymer and natural zeolite on shrinkage, mechanical properties, and porosity in ultra-high performance concretes","authors":"Yuxiang Tan , Bo Li , Yung-Tsang Chen , Yifeng Ling , Weizhuo Shi","doi":"10.1016/j.dibe.2024.100568","DOIUrl":"10.1016/j.dibe.2024.100568","url":null,"abstract":"<div><div>The low water-to-binder ratio of ultra-high performance concrete (UHPC) often causes shrinkage and cracking due to early-age self-desiccation. This leads to significant initial dimensional instability, which may compromise structural integrity. As a promising solution, internal curing agents such as superabsorbent polymers (SAP) and natural zeolite have the potential to mitigate shrinkage and achieve self-stressing properties. This research aims to provide a comprehensive comparison between SAP and zeolite's effects within a consistent UHPC formulation. Six UHPC mixtures (including the reference mixture) were designed: three with SAP dosages of 0.2%, 0.4%, and 0.6% by cement mass, and two with zeolite replacing silica fume at 25% and 50% by mass. Various testing methods, including autogenous and drying shrinkage assessment, heat of hydration and thermogravimetric analysis, compressive strength evaluation, mercury intrusion porosimetry (MIP), nuclear magnetic resonance (NMR), were employed to assess the mixtures at different stages of curing. The result reveals that the incorporation of SAP and zeolite in the mixtures significantly reduces UHPC's early-age autogenous shrinkage. Moreover, SAP and zeolite additions impact mechanical properties, demonstrating that a balance between shrinkage control and compressive strength can be reached, through an optimization of the additions to achieve the desired performance. Microstructural analysis through MIP and NMR reveals increased overall porosity of the UHPC with SAP and zeolite, suggesting that low-field NMR can be a valuable tool for complementing conventional test methods. The outcome of this study provided valuable insights into optimizing the balance between durability and mechanical performance, paving the way for more sustainable and cost-effective applications of UHPC in modern construction practices.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100568"},"PeriodicalIF":6.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654204","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

Explainable machine learning model for load-deformation correlation in long-span suspension bridges using XGBoost-SHAP 利用 XGBoost-SHAP 建立大跨度悬索桥荷载-变形相关性的可解释机器学习模型

IF 6.2 2区工程技术

Developments in the Built Environment Pub Date : 2024-11-02 DOI: 10.1016/j.dibe.2024.100569

Mingyang Chen , Jingzhou Xin , Qizhi Tang , Tianyu Hu , Yin Zhou , Jianting Zhou

{"title":"Explainable machine learning model for load-deformation correlation in long-span suspension bridges using XGBoost-SHAP","authors":"Mingyang Chen , Jingzhou Xin , Qizhi Tang , Tianyu Hu , Yin Zhou , Jianting Zhou","doi":"10.1016/j.dibe.2024.100569","DOIUrl":"10.1016/j.dibe.2024.100569","url":null,"abstract":"<div><div>The deformation of long-span suspension bridges in multiple loads is an important indictor to reflect their operation state. However, the correlation between multiple loads and structural deformation is difficult to quantify. Therefore, this study proposes an explainable machine learning model for the load-deformation correlation in long-span suspension bridges using eXtreme Gradient Boosting (XGBoost) and SHapley Additive exPlanations (SHAP). Firstly, the structural health monitoring system for a suspension bridge was used to construct the dataset for the training and testing of XGBoost model. Herein, temperature, wind and vehicle loads were used as the input variables, while midspan deflections and expansion joint displacements were treated as outputs. Subsequently, the hyperparameters of XGBoost model were optimized using grid search and 5-fold cross-validation to ensure its prediction performance. Then, the prediction results were compared with other four machine learning methods (i.e., linear regression, artificial neural networks, gradient boosted decision trees and CatBoost). Finally, the correlation between different loads and displacement responses were explained by the SHAP method to identify the contribution of the loads on deformation. The results show that the XGBoost model has the highest prediction accuracy. Compared to vehicle and wind loads, temperature significantly affects the deformation of long-span suspension bridges during daily operation. The effects of temperature and wind on bridge deformation are independent, and there is no significant interaction between these two factors.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100569"},"PeriodicalIF":6.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654252","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