Frontiers in Built Environment最新文献

{"title":"Improved YOLOX-based detection of condition of road manhole covers","authors":"Li Yang, Zhongyu Hao, Bo Hu, Chaoyang Shan, Dehong Wei, Dixuan He","doi":"10.3389/fbuil.2024.1337984","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1337984","url":null,"abstract":"Manhole cover damage poses significant threats to road safety and infrastructure integrity, necessitating timely detection and repair. To address this, we introduce an enhanced YOLOX model integrated with ECA (High Efficiency Channel Attention) modules for real-time monitoring using car recorder footage. Our method categorizes manhole cover conditions into three distinct states: normal, broken, and down. By in-corporating ECA-Net before the decoupling head of the YOLOX model, we significantly boost its channel feature extraction abilities, critical for distinguishing subtle changes in cover conditions. Experimental results reveal a substantial increase in mean Average Precision (mAP) to 93.91%, with a notable AP of 92.2% achieved in the detection of the ‘down’ state, historically the most challenging category. Despite the en-hancements, our model maintains a high detection speed, processing at an average rate only five images per second slower than the original YOLOX model. Comparative analyses against leading detection models, in-cluding Faster R-CNN, SSD, and CenterNet, underscore the superiority of our approach in terms of both accuracy and speed, particularly in accurately recognizing the ‘down’ condition of manhole covers. This in-novative model provides a reliable tool for swiftly identifying damaged manhole covers and their precise lo-cations, enabling prompt maintenance actions. By improving the monitoring efficiency of urban infrastruc-ture, our solution contributes to enhanced road safety and the advancement of smart city technologies.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141662016","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 control accuracy for a boundary-coordinating device in a real-time hybrid test","authors":"Yingpeng Tian, Quanwang Li, Changcan Bu, Fenglei Fan, Tao Wang","doi":"10.3389/fbuil.2024.1424108","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1424108","url":null,"abstract":"Multi-axial real-time hybrid simulation (ma-RTHS) utilizes multiple loading devices to realize boundary control with multiple degrees of freedom (MDOF), thus being capable of handling complex dynamic scenarios and multi-dimensional problems. In this paper, a new control technique was developed by using a parallel configuration of double shaking tables to implement shear force and bending moment at the boundary between substructures. The dynamic forces are combined by inertia forces of controlled mass driven by electromagnetic shaking tables. The two shaking tables are packaged as a boundary-coordinating device (BCD). An enhanced three-variable control (ETVC) was proposed to consider the coupling effect between two shaking tables and incorporated with the adaptive time series (ATS) compensator to improve the synchronization of the two shaking tables. The proposed control method was verified by three rounds of hybrid tests on a four-story steel shear frame using different ground motions. Nine criteria were utilized to evaluate the performance of RTHS including both tracking performance and global performance indexes. It was proved that RTHS was successfully implemented, and the boundary forces were well-tracked by the proposed control strategy. Good tracking performance was achieved to prove the effectiveness of the strategy.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666574","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":"Robust decentralized adaptive compensation for the multi-axial real-time hybrid simulation benchmark","authors":"María Quiroz, Cristóbal Gálmez, Gaston A. Fermandois","doi":"10.3389/fbuil.2024.1394952","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1394952","url":null,"abstract":"Real-time hybrid simulation (RTHS) is a powerful and highly reliable technique integrating experimental testing with numerical modeling for studying rate-dependent components under realistic conditions. One of its key advantages is its cost-effectiveness compared to large-scale shake table testing, which is attained by selectively conducting experimental testing on critical parts of the analyzed structure, thus avoiding the assembly of the entire system. One of the fundamental advancements in RTHS methods is the development of multi-dimensional dynamic testing. In particular, multi-axial RTHS (maRTHS) aims to prescribe multi-degree-of-freedom (MDOF) loading from the numerical substructure over the test specimen. Under these conditions, synchronization is a significant challenge in multiple actuator loading assemblies. This study proposes a robust and decentralized adaptive compensation (RoDeAC) method for the next-generation maRTHS benchmark problem. An initial calibration of the dynamic compensator is carried out through offline numerical simulations. Subsequently, the compensator parameters are updated in real-time during the test using a recursive least squares adaptive algorithm. The results demonstrate outstanding performance in experiment synchronization, even in uncertain conditions, due to the variability of reference structures, seismic loading, and multi-actuator properties. Notably, this achievement is accomplished without needing detailed information about the test specimen, streamlining the procedure and reducing the risk of specimen deterioration. Additionally, the tracking performance of the tests closely aligns with the reference structure, further affirming the excellence of the outcomes.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141669283","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":"Population demographic tracking and estimation tool: a simulation-dashboard for urban redevelopment’s demographic implications in Israel","authors":"Daphna Levine, Shai Sussman, Meirav Aharon-Gutman, Sharon Yavo Ayalon","doi":"10.3389/fbuil.2024.1405464","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1405464","url":null,"abstract":"This research introduces a pioneering methodology and user-friendly online dashboard for examining population shifts during urban redevelopment in Bat Yam, Israel, part of the Tel Aviv Metropolitan Area. The simulation tool, operated through scripts, predicts how redevelopment scenarios will impact household demographics over time. Its output is a population track-change CSV file detailing demographic changes. The accompanying online dashboard visually presents these changes, making the data accessible to policymakers and planners. The tool’s consideration of environmental factors enhances its applicability in identifying vulnerable populations and resilient communities amidst urban renewal. This user-friendly approach, compatible with existing planning tools, underscores the article’s significance in advancing urban planning practice and addressing societal needs.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141677103","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":"Unlocking resilience and sustainability with earth-based materials: a principled framework for urban transformation","authors":"Michael Bühler, Pia Hollenbach, Lothar Köhler, Rachel Armstrong","doi":"10.3389/fbuil.2024.1385116","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1385116","url":null,"abstract":"This paper introduces a transformative “living” hypothesis in architecture and engineering, proposing a paradigm shift from conventional design to regenerative, ecologically interconnected resilient systems. At the heart of our hypothesis is the integration of earth-bound materials and bioreceptive surfaces through metabolic exchanges that can be directly monitored via bioelectricity using advanced computational models and cooperative governance structures. This innovative approach that links the living world with natural materials and digital computing, aims to foster sustainable urban development that dynamically and meaningfully responds to ecological shifts, thereby enhancing social sustainability and environmental resilience. Founded on an active relationship with Earth Based Materials (EBMs) our work operationalises the foundational link between organic life and inorganic matter, e.g., minerals, to establish a dynamic relationship between building materials, and ecological systems drawing on the foundational metabolisms of microbes. To enable this ambitious synthesis, our work builds upon and diverges from traditional foundations by operationalizing actor-network theory, new materialism, and regenerative design principles through the application of bioelectrical microbes to “living” materials and digital twins. We propose a novel resilience framework that not only advocates for a symbiotic relationship between human habitats and natural ecosystems but also outlines practical pathways for the creation of adaptive, self-organizing built environments that are informed by data collection and metabolic feedback loops. These environments are fundamentally regenerative, dynamic, and environmentally responsive in ways that can be understood and engaged by human engineers and designers, transcending current sustainability and resilience targets through a methodology rooted in interdisciplinary collaboration. We address challenges such as regulatory barriers, lack of standardization, and perceptions of inferiority compared to conventional materials, proposing a new standardization framework adaptable to the unique properties of these materials. Our vision is supported by advanced predictive digital modelling techniques and sensors, including the integration of biofilms that generate action potentials, enabling the development of Digital Twins that respond to metabolic signals to enhance sustainability, biodiversity, and ultimately generate environmentally positive socio-economic outcomes. This paper reviews existing methodologies to establish an overview of state-of-the-art developments and offers a clear, actionable plan and recommendations for the realization of regenerative and resilient systems in urban development. It contributes a unique perspective on sustainable urban development, emphasizing the need for a holistic approach, which integrates the foundational metabolism of microbes, assisted by big biological data and artificial intelligences","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141678688","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":"Seismic capacity evaluation of reinforced concrete moment-resisting frames with steel damper columns using incremental critical pseudo-multi impulse analysis","authors":"Kenji Fujii","doi":"10.3389/fbuil.2024.1431000","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1431000","url":null,"abstract":"Steel damper columns (SDCs) are energy-dissipating members that are suitable for reinforced concrete (RC) moment-resisting frames (MRFs) and those often used for multistory housing. In a previous study, the authors proposed an energy-based prediction procedure for the peak and cumulative response of an RC frame building with SDCs. In this procedure, the accuracy of the equivalent velocity of the maximum momentary input energy (VΔE1*)–peak equivalent displacement (D1*max) relationship is essential for improved prediction. In this article, the seismic capacity curve (VΔE1*–D1*max relationship) of RC MRFs with and without SDCs is evaluated using incremental critical pseudo-multi impulse analysis (ICPMIA). In the ICPMIA, which is based on a study by Takewaki and coauthors, the structure is subjected to various intensities of critical pseudo-multi impulsive lateral force. An ICPMIA of planer four 8- and 16-story RC MRFs with and without SDCs is performed to obtain their structural behaviors under various intensities of pulsive input. Then, the seismic capacity curve obtained from the ICMPIA results are compared with the predicted results based on the simplified equations. The main findings of this article are as follows. (i) The seismic capacity curve of RC MRFs without SDCs strongly depends on the number of impulsive lateral forces (Np). As Np increases, the seismic capacity decreases. The predicted seismic capacity curve severely underestimates that obtained from the ICMPIA in the case of large Np. This trend is notable when the level of pinching behavior in the RC members is severe. (ii) In the case of an RC MRF with SDCs, however, the influence of Np on its seismic capacity curve is small. The predicted seismic capacity curve agrees very well with that obtained from the ICMPIA. The influence of the level of pinching behavior in RC members on the seismic capacity curve is small.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681102","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":"Analyzing the link between built environment and physical activity: a spatial study in suburban area","authors":"P. Iamtrakul, S. Chayphong","doi":"10.3389/fbuil.2024.1420020","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1420020","url":null,"abstract":"Promoting physical activity is a significant concern that contributes to urban development, thereby fostering good health among city residents. This imperative highlights the interconnectedness between public health initiatives and the advancement of urban landscapes, reflecting the interdisciplinary nature of environmental science. Hence, this study aims to investigate the correlation between the built environment and access to physical activities within distinct local contexts. Utilizing the ordinary least squares estimation technique alongside spatial statistical analysis tools can facilitate the exploration of spatial disparities and interdependencies. Results pertaining to the built environment indicate significant differences within the built group context at a p-value level of 0.000. This suggests that within the local context, various activities, including those related to the transportation system, differ throughout the city. Findings regarding the link between the built environment and physical activity indicate that the relatively low R-squared values (0.10–0.20) may be attributed to the presence of grid areas with minimal walking distances. This finding underlines the key role of the built environment in promoting physical activity, highlighting the importance for urban planning and design to prioritize enhancements in active transportation infrastructure and increase access to urban activity nodes. This can be achieved by strategically distributing physical activity opportunities and ensuring accessibility via active transportation and public transit.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141680656","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":"Key decision factors of professional stakeholders (architects, engineers, constructors) when deciding for sustainable construction","authors":"Lea Primožič, Andreja Kutnar","doi":"10.3389/fbuil.2024.1420163","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1420163","url":null,"abstract":"The built environment and the construction industry account for a significant share of global harmful emissions. Sustainable construction appears to be an effective strategy to achieve a more sustainable society, although it is still not used enough. It is crucial to understand what the main decision factors of those deciding about building practices are. Professional stakeholders such as architects, engineers, constructors, are the ones advising consumers and deciding about construction. An understanding about their decision factors is needed, in order to increase the implementation of sustainable construction. In this study we provide evidence about key decision factors of professional stakeholders in Slovenia when deciding for sustainable construction practices. By conducting an online survey (questionnaire) we identified and analyzed the main drivers and barriers of professionals when making decisions about sustainable construction solutions. With statistical analysis we found out that professional stakeholders included in the survey mostly already had previous experiences working with sustainable construction. They are familiar with sustainable construction concepts. The most important drivers were connected to the factor of occupant health, and the energy-efficiency of the buildings, while the biggest barrier in their decision making is related to higher cost of sustainable construction and lack of awareness. Professional stakeholders are concerned about climate change and their attitudes towards climate change are affecting their decision related to sustainable construction. Respondent provided many comments, clearly indicating that a simple definition of sustainable construction is needed, and more efforts should be done to raise awareness about sustainable construction. Results are contributing valuable information for professional stakeholders, policymakers and other important stakeholders in the construction ecosystem.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141687938","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":"Exploring inhibiting factors to affordable housing provision in Lagos metropolitan city, Nigeria","authors":"K. Ogundipe, J. D. Owolabi, B. Ogunbayo, C. Aigbavboa","doi":"10.3389/fbuil.2024.1408776","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1408776","url":null,"abstract":"Different inhibiting factors have affected the need for affordable housing provisions to keep pace with the increase in urbanisation and population growth, leading to the non-availability of desirable, affordable housing goals for low-income earners. Unfortunately, these inhibiting factors continue to create challenges that affect affordable housing development for low-income earners. Hence, this study examines the inhibiting factors affecting affordable housing provisions using Lagos metropolitan city, Nigeria, as a case study exemplar. A quantitative research design was employed, using the survey to collect data from the target populations of low-income earners in Lagos, Nigeria, through a purposive sampling technique with a high response rate of 75.3%. Descriptive and exploratory factor analysis was conducted on the retrieved data and Cronbach’s alpha test to determine data reliability and interrelatedness. Thirty-seven identified inhibiting factors of affordable housing provisions were clustered into seven components: problems with affordable land and security of tenure; socioeconomic constraints; problems with conventional materials and technologies; unpredictable internal factors; absence of innovative framework and supply chain; absent of community collaboration and external economic factors; and urbanisation factors. The implications of the study findings provide a better understanding of land tenureship, improved social inclusion, community-based stakeholder collaboration, standardisation of indigenous construction materials and technologies utilisation, and housing policy reforms to alleviate the shortage of affordable housing delivery in metropolitan cities. The study recommends successful implementations of affordable housing provisions hinged on an innovative housing framework and affordable supply chain through design, standardisation of non-conventional materials and technologies utilisation and social inclusion. The study’s conclusion gives housing stakeholders, realtors, policymakers, and government agencies the ability to understand and implement strategies to overcome socioeconomic constraints, land security of tenure, and urbanisation factors to predict and improve affordable housing demand and supply in metropolitan cities.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691956","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":"Characteristics and analysis of static strain response on typical asphalt pavement using fiber Bragg grating sensing technology","authors":"Hongfu Liu, Bo Chen, Zhonglu Cao, Qinxue Pan, Tuo Huang, Songtao Lv, Guoping Qian","doi":"10.3389/fbuil.2024.1409520","DOIUrl":"https://doi.org/10.3389/fbuil.2024.1409520","url":null,"abstract":"To study the real internal strain response of asphalt pavement and provide crucial data for optimizing pavement design. By burying the fiber grating sensors on site, the strain tests of four asphalt pavement structures under different working conditions were carried out, and the results showed that the static strain time curve is viscoelastic and conforms well to the Bugers model, and the fitting coefficient of determination is 0.98. The strain response of the asphalt surface courses of the four pavement structures under static load shows a double hump variation with the transverse position, with peaks occurring directly beneath the wheel load center. The transverse strain fluctuated between tension and compression, mirroring changes in the lateral position. While longitudinal strains, always tensile, were symmetrically aligned with the centerline of the longitudinal sensors, this pattern differed notably from that of the transverse sensors. In the base layers, the strain profile typically presented a single peak, located at the wheel gap, underscoring a critical area of stress concentration. Numerically, the peak strain of asphalt surface course is larger than that of base course. The most unfavorable loading position of the base course occurs at the wheel gap of the lower base course. The most adverse loading position of the surface course appears at the wheel load at the bottom of the upper or middle course. The research results can provide data support for improving the design method of asphalt pavement.","PeriodicalId":37112,"journal":{"name":"Frontiers in Built Environment","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098692","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}