Frontiers in Built Environment最新文献

{"title":"Comprehensive evaluation of the aggressive certain degree of the chemical components in water to concrete","authors":"Thy Truc Doan","doi":"10.3389/fbuil.2024.1275218","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1275218","url":null,"abstract":"Evaluation and research on the aggressive degree to concrete were done in the previous research. However, the evaluation of aggressive certain degree in water to the concrete was experimented comprehensively in the laboratory by the Viet Nam Standard “TCVN 3994:1985” and ISO 14911:1998. In addition, this paper considers water with the chemical name “Chlorite-Bicarbonate-Sodium-Magnesium” by the Kurlov formula and “TCVN 81:1981”. Especially, comprehensive consideration of chemical analysis that includes Cation (Ca2+; Mg2+; ∑(Fe2+; Fe3+; Na+; K+; and NH4+); Anion (Cl−; SO42−; HCO3−; CO32− and OH−); and the other special items analysis which includes Permanent and Temporary hardness; Alkalinity; CO2 free; CO2 corrosive; Total mineralization; pH value; Nitrite (NO2−); and Nitrate (NO3−). The research results presented “water with chemical characteristics can’t create the aggression in concrete,“ which shows pH concentration is 5 and CO2 corrosion is 20 mg/l (approximately 0.04%); whereas ion Mg2+ is 1.5 g/l (approximately 3%) and SO42− is 0,25 g/l (approximately 0.5%). The total salt content in the presence of an evaporating surface obtains 12,5 g/l (approximately 25%). So research results can be used safely for the design or construction of the reinforcement concrete structures in My Thai Canal Bridge, Rach Gia town, Kien Giang province, Viet Nam, and Construction or Geotechnical as good reference documents in the future.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intelligent railroad inspection and monitoring","authors":"Yu Qian","doi":"10.3389/fbuil.2024.1389092","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1389092","url":null,"abstract":"Railways are essential to the global transportation infrastructure, providing eco-friendly and economical solutions for the movement of freight and passengers. Inspecting and maintaining extensive rail networks timely poses significant challenges. My group and collaborators have focused on automated railroad inspection technologies, emphasizing the use of deep learning and computer vision to overcome the limitations of traditional manual inspections. Our research introduces groundbreaking real-time inspection methods, leveraging a specialized dataset of railroad components for enhanced instance segmentation models, achieving unprecedented accuracy and inference speeds. The developed computer vision systems efficiently detect track components and their changes over time, and also quantify rail surface defects. Additionally, our work extends to improving railroad crossing safety, utilizing deep learning frameworks for the detection of unusual pedestrian behaviors and object identification, aimed at reducing crossing incidents and improving emergency response times. Our future research directions aim to further refine the cost-effectiveness and autonomy of railroad inspection systems. Through these innovations, we hope to aid in the inspection and maintenance of railroads, offering practical solutions for railroad and other civil engineering applications.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140712036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robustness, redundancy, inclusivity, and integration of built environment systems: resilience quantification from stakeholders’ perspectives","authors":"Mohammed M. Al-Humaiqani, Sami G. Al-Ghamdi","doi":"10.3389/fbuil.2024.1343334","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1343334","url":null,"abstract":"The built environment faces a growing number of challenges due to changing climates. A resilient built environment system (BES) can withstand disruptions and shocks, and resilient design allows communities to bounce back quickly. Considering present and future needs, BESs can be oriented to adapt to new uses or modified to handle changing climates. This study examines the resilience qualities (RQs) of built environment systems (BESs) in responding to and recovering from climate change disruptions effectively. A survey was designed to capture the views of various stakeholders about the different indicators to assess the four RQs: robustness (Rb), redundancy (Rd), inclusivity (Ic), and integration (It). Regulatory and engineering stakeholders participated in the survey, and the results were analyzed using statistical methods. Stakeholders generally agree on the need to enhance transformative capacity for addressing uncertainties and climate challenges. While stakeholders trust the role of BESs’ robustness against climate impacts, some suggest improving standards for better resilience. There is consensus on the importance of regulatory measures mandating emergency resources in BESs. The study highlights the need to enhance adaptive capacities and tools within BESs. Incorporating reconfigurability and spare capacity in BESs is crucial to prevent disruptions. Participants tend to think promoting good practices at the community level is essential to address climate impacts effectively. The analysis highlights the importance of inclusive community consultation and involvement in fostering a shared responsibility for enhancing urban ecosystems against climate change impacts. This involves aligning processes across various city systems to support cohesive decision-making and strategic investments. The study suggests developing objective engineering techniques to establish a standardized approach for evaluating the RQs of BESs.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140729222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Smart cities and communities in the GCC region: from top-down city development to more local approaches","authors":"Mohammad Al-Saidi, Esmat Zaidan","doi":"10.3389/fbuil.2024.1341694","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1341694","url":null,"abstract":"City planners are seeking ways to incorporate human-centric urban projects that combine smart technology, good infrastructure and people’s perception as well as their participation. Smart city developments are increasingly being applied to smaller scales at which communities can co-design hard infrastructure and the resulting services. Experiences from city projects at this level have produced a plethora of designs, challenges and success factors, particularly from cases in countries with long legacies in city development. In the Gulf Cooperation Council region, young cities and new planned cities house the bulk of the population and face environmental challenges related to urban segregation, urban sprawl and large consumption footprints. The political-economy of this region in terms of central urban planning and government-led economic development offers valuable insights on the limits and challenges in implementing projects related to smart and connected communities (SCC). SCC as a label for smart urban interventions towards more connectedness between hard and soft (human-related) infrastructure can provide opportunities for participatory and sustainable urban planning in the region. This paper analyzes the role of community-level interventions within the smart city policies of Gulf countries. It shows that only few local-level projects exist, while the barriers to large-scale SCC initiatives are related to demographics, community characteristics, technological sophistication, lack of conducive regulations, and the prevalence of central urban planning. The success of local smart city approaches in the Gulf is dependent on public leadership in terms of clearing obstacles, designing broader strategies, and expanding projects to include the residential sector. Considering the potential of SCC projects to enhance the transition to sustainability in the predominantly urban Gulf societies, broader engagement of local governments, utilities, and community-level developers can result in tangible benefits in terms of more sustainable, smart and tailored local services.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140739457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revolutionizing construction safety: introducing a cutting-edge virtual reality interactive system for training US construction workers to mitigate fall hazards","authors":"Ammar Alzarrad, Matthew Miller, Luke Durham, Sudipta Chowdhury","doi":"10.3389/fbuil.2024.1320175","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1320175","url":null,"abstract":"The construction industry is fraught with hazards, chief among them being the risk of falls from elevated positions, which are a leading cause of both fatalities and injuries among workers. Despite the prevalence of traditional safety training methods, their effectiveness in reducing fall risks remains limited. To solve this issue, this study proposes the adoption of interactive VR technologies to provide construction workers with immersive training experiences in the critical domain of fall safety. This approach not only ensures adherence to the Occupational Safety and Health Administration (OSHA) requirements but also leverages VR’s immersive capabilities to create a comprehensive and effective learning tool. To evaluate the proposed system’s efficacy, the researchers conducted an empirical assessment involving eighty-two construction workers from two small enterprises. Participants were divided into two groups: one receiving traditional training and the other undergoing VR-based instruction. Both groups underwent pre- and post-training evaluations comprising six targeted questions designed to measure the impact of each training method on their understanding and awareness of fall safety practices. The comparative analysis revealed no significant differences in baseline knowledge between the two groups prior to the training interventions. However, post-training evaluations demonstrated a notable improvement in the VR group, with a significant decrease in the number of incorrect responses, in stark contrast to the group subjected to traditional training methods. Statistical analysis further confirmed the superiority of VR training in enhancing participants’ knowledge. This was quantified by a p-value of 0.0016, indicating a high level of statistical significance well below the conventional threshold of 0.05. This study highlights the significant advantages of VR technology in construction safety training, demonstrating its superiority over traditional training methods in terms of knowledge retention and practical application. The results strongly support the wider adoption of VR in safety training, indicating its potential to enhance safety outcomes in the construction sector.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140747455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanisms of visibility of rurality and border areas in Usme","authors":"Alba Lucia Meneses-Baez, Elvia Isabel Casas-Matiz","doi":"10.3389/fbuil.2024.1264653","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1264653","url":null,"abstract":"Introduction: The visibility of rurality contributes to optimizing the planning and administrative management processes of the territories by providing contextualized information about the relationship of the inhabitants with the area under study. The objective of this research is to identify the mechanisms of visibility of rurality in Usme, a locality in Bogotá, Colombia.Methods: A case study was carried out using a mixed methodology. Based on a literature review, conceptual categories that support the visibility of rurality were formulated, and based on them, a perception survey addressed to the peasant leaders of Usme was designed. The survey contained 22 questions that inquired about socio-demographic data, citizen participation, roles of the inhabitants, participation scenarios, conditions, institutions, opportunities for improvement, and the needs and processes of the locality; the questions were multiple-choice with a single answer and open-ended. The survey was sent to 50 peasant leaders, of whom 36 responded (13 men, 21 women, and 2 LGBTIQ), who were residents of low (25), medium (3), and high (8) localities in the rural zone of Usme. Using the ATLAS.ti program, a frequency analysis was carried out for the multiple-choice questions and the textual data, as well as a content analysis of deductive and emergent categories; then, a nomological network on the mechanisms of visibility was constructed.Results: Findings show that participants understand rurality visibility mechanisms in terms of five dimensions: spaces of visibility, dimensions of rurality, forms of participation, places of participation, and types of impact.Discussion: The delimitation and definition of the dimensions that constitute the mechanisms of rurality visibility in the borders contribute to the designing of effective strategies to improve the conditions of the inhabitants of this area, as well as their participation in increasing the impact and coverage of the institutions of the territory, aiming to improve the quality of life of the inhabitants of the area. We concluded that, in order for this to happen, it is necessary to have community empowerment and social co-responsibility among the community, civil institutions, and government.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140226388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of data-driven NARX model based compensation for multi-axial real-time hybrid simulation benchmark study","authors":"Weijie Xu, Xiangjin Meng, Cheng Chen, T. Guo, Chang Peng","doi":"10.3389/fbuil.2024.1374819","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1374819","url":null,"abstract":"Actuator control takes a pivotal role in achieving stability and accuracy, particularly in the context of multi-axial real-time hybrid simulation (maRTHS). In maRTHS, multiple hydraulic actuators are necessitated to apply precise motions to experimental substructures thus necessitating the application of multiple-input multiple-output (MIMO)control strategies. This study evaluates the data-driven nonlinear autoregressive with external input (NARX) based compensation for the servo-hydraulic dynamics within the maRTHS benchmark model. Different from previous study, nonlinear terms are incorporated into the NARX model. Online least square and ridge regression techniques are utilized to estimate the model coefficients to achieve optimal compensation. The influence of various model order and window length is assessed for the NARX model-based compensation. The findings of this research demonstrate that NARX-based compensation has significant potential not only in facilitating precise actuator control for maRTHS but also in enabling robust control in the presence of unknown uncertainties inherent to the servo-hydraulic system.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140224533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Future buildings as carbon sinks: Comparative analysis of timber-based building typologies regarding their carbon emissions and storage","authors":"Daria Dzhurko, Ben Haacke, Asta Haberbosch, Linde Köhne, Nora König, Frida Lode, Antonia Marx, Luka Mühlnickel, Nina Neunzig, Annika Niemann, Henrieke Polewka, Lea Schmidtke, Pia Luz Marie Von der Groeben, Karl Wagemann, Farah Thoma, Clemens Bothe, Galina Churkina","doi":"10.3389/fbuil.2024.1330105","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1330105","url":null,"abstract":"The building and construction sector is responsible for a large share of carbon emissions resulting in the need to reduce them to mitigate climate change. Timber construction methods promise to lower emissions combined with biogenic carbon storage in the built environment. While there are several studies comparing the emissions of mineral-based and timber-based buildings, a consistent comparison of different timber-based building assemblies is still missing. This study compares carbon emissions from material production and carbon storage capabilities of four timber-based and two brick and reinforced concrete building assemblies. These assemblies were designed for a residential multi-storey building in Berlin, Germany. To compare and rank the carbon impacts of these assemblies we introduce a carbon storage-to-emission ratio. The calculations were performed using a Carbon Cycle Assessment Model implementation in Python. The results indicate an average reduction in carbon emissions of timber-based building assemblies by 32.6% to “Brick” and 40.4% to “Reinforced Concrete”, respectively. Across the timber-based building assemblies, the carbon emissions range between 85 t and 115 t, leading to an average of 105 t per building. Pronounced differences were observed in carbon storage, with the “Dowel Laminated Timber” building assembly storing more than three times the amount of carbon compared to “Light Weight Timber” assembly. To further reduce emissions from buildings and the construction sector and potentially enhance urban carbon storage, “Glue Laminated Timber” and “Dowel Laminated Timber” building assemblies were identified as the most promising.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140234097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the permanent deformation of asphalt mixtures based on the modified Burgers model","authors":"Junren Yang, Jun Xie, Xu Tang, Haijun Zhang","doi":"10.3389/fbuil.2024.1357396","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1357396","url":null,"abstract":"Based on the confined test results and the viscoelastic constitutive model of asphalt mixtures, a three-dimensional finite element model of an asphalt pavement was established to study the effect of different working conditions on asphalt pavement. With the actual pavement structure response, a comparative analysis was conducted to assess the stress and strain experienced by the asphalt pavement under various working conditions. The results show that the asphalt pavement structure model can reflect the effect of different working conditions on asphalt pavement; the transverse stress and strain of asphalt pavement are most significantly affected by the working conditions during cornering, and the position of the maximum value is concentrated on the outer edge line of the wheel and a distance away from it; however, the longitudinal tensile stress and strain of the asphalt pavement are most significantly impacted by the working conditions of driving and braking, and the position of the maximum value is mainly distributed in the center line of the single wheel. The research results can provide a reference for the design of asphalt pavement structures.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards the development of legislative framework for solar neighborhoods","authors":"Caroline Hachem Vermette, S. Yadav, Johannes Brozovsky, Silvia Croce, Gilles Desthieux, M. Formolli, K. Grewal, J. Kanters, Gabriele Lobaccaro, M. Manni, Maria Wall","doi":"10.3389/fbuil.2024.1352844","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1352844","url":null,"abstract":"The growing implementation of sustainable urban infrastructure, utilizing solar energy for heat and power generation, daylighting, and thermal comfort, has intensified the focus on sustainability standards and guidelines. Nevertheless, a noticeable deficiency persists in regulations that specifically address solar energy access and protection, posing a barrier to the diffusion of solar-centric neighborhoods. This paper examines the traditional urban regulatory frameworks and the state of solar energy regulations and practices within five countries (i.e., Canada, Italy, Norway, Sweden, and Switzerland). The aim of the study is to (i) identify gaps in existing regulations, standards, and codes, (ii) highlight the need for future regulations to protect solar access and rights, and (iii) support the deployment of solar technologies on a large scale. The results underline that climate-related regulations often fall short of specificity tailored to regional and local climates, relying on generalized climate considerations. Solar energy legislation is generally scarce and lacks comprehensive planning. Finally, despite various financial incentives for the installation of active solar strategies, their impact remains limited, impeding the wide spread of solar technology as a primary source of energy production in urban environment.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140260627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}