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Healthy Buildings 2023: Asia and Pacific Rim

作者： Qin, Chao Li, Zheng-Tong Lyu, Xiao-Pu Lu, Wei-Zhen Department of Architecture and Civil Engineering City University of HongKong Hong Kong Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic University Hong Kong Department of Geography Hong Kong Baptist University Hong Kong

ISBN: (纸本)9781713890850

Impinging jet ventilation (IJV) systems effectively mitigate exhaled contaminants because they supply fresh air directly to the occupied zone and remove polluted or heated air from ceiling exhausts. However, the transfer of exhaled contaminants in hospital wards is unclear. Previous research on ventilating hospital wards with IJV systems was essentially a personalized ventilation system. This study aims to investigate the transmission of exhaled aerosols in an IJV system ventilated hospital ward. Results indicate that vertically exhaled aerosols are transferred from the patient opposite the diffuser to the patient near the diffuser, despite low air velocity in the room. These results indicate that the airflow created by the jet supply plays an important role in cross-transmission. © 2023 Healthy Buildings 2023: Asia and Pacific Rim. All rights reserved.

关键词： Transmissions

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The effect of noise barriers on viaducts on pollutant dispersion in complex street canyons

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Energy and Built Environment 2023年第5期4卷 589-600页

作者： Tingzhen Ming Fangyan He Yongjia Wu Tianhao Shi Changrong Su Caixia Wang Zhengtong Li Wei Chen Renaud de Richter School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong KongChina Tour-Solaire.Fr 8 Impasse des PapillonsMontpellier F34090France

The noise reduction effect of noise barriers has been extensively studied,but the effect on pollutant dispersion remains unclear.A computational fluid dynamics(CFD)simulation is conducted to investigate the effects of different heights,lengths,and types of noise barriers and different wind speeds on pollutant dispersion in street canyons with *** field synergy theory of the convective mass transfer process is used for quantitative analysis of pollutant dispersion in street *** results show that as the height and length of the noise barrier increase,the pollutant dispersion capacity *** the wind speed increases,the rate of decrease in the average CO concentration *** effect of the wind speed on the synergistic improvement of the speed and concentration gradient vectors differs for different types of noise *** performance follows the order:fully-closed noise barrier>left noise barrier>right noise barrier>semi-closed noise *** different noise barrier types significantly impact the flow field and pollutant dispersion and reduce the CO concentration to varying degrees,except for the fully-closed *** average CO concentration in the pedestrian breathing zone is reduced by a maximum of 55.85%on the leeward side and by 53%on the windward side,indicating that an appropriate noise barrier on the viaduct reduces noise pollution and improves the air quality in street canyons,especially in the pedestrian breathing zone.

关键词： ANSYS FLUENT Carbon monoxide Computational fluid dynamics(CFD) Near-road environment Traffic related air pollutants(TRAP)

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Exploiting Immersive Virtual Reality for Investigating the Effects of Industrial Noise on Cognitive Performance and Perceived Workload 3rd

Exploiting Immersive Virtual Reality for Investigating the E...

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3rd International Conference on Design Tools and Methods in Industrial engineering, ADM 2023

作者： Evangelista, Alessandro Manghisi, Vito M. De Giglio, Vito Martellotta, Francesco Giliberti, Claudia Mariconte, Raffaele Uva, Antonio Emmanuele Department of Mechanics Mathematics and Management Polytechnic University of Bari Bari Italy Department of Civil Engineering Sciences Architecture Polytechnic University of Bari Bari Italy Dip. Innovazioni Tecnologiche e Sicurezza degli Impianti Prodotti ed Insediamenti Antropici Inail Rome Rome Italy

ISBN: (纸本)9783031520747

The Industry 5.0 paradigm emphasizes the importance of the operator’s well-being by seeing human-centricity as one of its cardinal principles. This enables a twofold benefit, improving the sustainability of the production process and enhancing performance. Improving performance and increasing operators’ safety is often related to cognitive load optimization. Confined spaces are working environments where elements of distraction, such as noise, can cause accidents with major, even fatal, consequences. Studies on the effects of noise on cognitive abilities present mixed results, and those concerning confined spaces are limited as they require an expensive experimental setup replicating the working scenario. Immersive Virtual Reality (IVR) technology enables overcoming this gap by replicating the experimental conditions in a synthetic environment. We exploited IVR to study noise’s impact on cognitive performance in confined spaces. We compared the impact of a stationary continuous noise source with an intermittent non-periodic one by administering the Stroop Color and Word Test. We also assessed the perceived cognitive effort by administering the modified noise-induced task load index questionnaire. We also compared the effects on the operator’s physiological activity through Heart Rate Variability (HRV) analysis. Results show that by keeping the equivalent noise level lower than 85 dB, noise has no statistically significant effects on cognitive performance and Heart Rate. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Sustainable development

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Integrating environmental sustainability in construction Time-Cost trade-off for decision-making using hybrid NSGA-III and MOPSO approach

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Asian Journal of Civil engineering 2025年第4期26卷 1527-1542页

作者： Nagayo, Analene Montesines Singh, Rekha Dhawan, Amit Manjunath, T.C. Qasem, Altayeb Sethi, Krushna Chandra Sharma, Kamal Department of Engineering and Technology University of Technology and Applied Sciences-Al Musanna Al Muladdah Oman Department of Civil Engineering Raj Kumar Goel Institute of Technology Ghaziabad India Department of Civil Engineering Dr. Bhim Rao Ambedkar Polytechnic College Gwalior India Computer Science Engineering Department Rajarajeswari College of Engineering Bangalore India Department of Building Engineering College of Architecture and Planning Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia Department of Civil Engineering Centurion University of Technology and Management Gajapati India Department of Civil Engineering Madhav Institute of Technology and Science Gwalior India

Construction project management often involves optimizing time and cost while ensuring minimal environmental impact. This study presents an innovative hybrid approach combining non-dominated sorting genetic algorithm III (NSGA-III) and multi-objective particle swarm optimization (MOPSO) to address the time-cost-environmental sustainability trade-off (TCEST) in construction projects. The proposed model aims to minimize project completion time and cost while maximizing environmental sustainability. A case study is conducted to validate the model, incorporating diverse construction activities and their respective time, cost, and environmental sustainability metrics. The results reveal Pareto-optimal solutions demonstrating significant trade-offs among the three objectives. The hybrid approach outperforms standalone algorithms in terms of solution diversity, convergence, and hypervolume indicators. Weighted sum methods are employed to select the most suitable solution from the Pareto front based on project priorities. Correlation analysis further explores interdependencies among objectives, emphasizing the feasibility of balancing these critical factors. The study contributes a robust decision-support tool for sustainable project planning, facilitating informed decision-making in modern construction management. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Hybrid Optimization MOPSO NSGA-III Sustainable Construction Time–Cost-Environmental Trade-off

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The Real Estate Risk Assessment: An Innovative Methodology for Supporting Public and Private Subjects Involved into Sustainable Urban Interventions 23rd

The Real Estate Risk Assessment: An Innovative Methodology f...

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23rd International Conference on Computational Science and Its Applications, ICCSA 2023

作者： Morano, Pierluigi Anelli, Debora Tajani, Francesco Roma, Antonella Department of Civil Environmental Land Construction and Chemistry Engineering Polytechnic University of Bari Bari70126 Italy Department of Architecture and Design "Sapienza" University of Rome Rome00196 Italy

ISBN: (纸本)9783031371196

Projects carried out under Public-Private Partnership (PPP) forms are increasingly being used for construction, new infrastructure implementation, urban redevelopment operations and more general land interventions. PPP projects, due to their complexity, are characterized by risks that undermine their success, for this reason risk assessment models for PPP projects are essential to their successful implementation. In this context, the research proposes an innovative real estate risk assessment methodology for supporting the Public Administration and the Private Entrepreneur involved into PPP projects. The research proposes an ex-ante real estate risk assessment methodology, based on the multi-criteria Analytic Hierarchy Process (AHP) technique that can be used at different territorial scales and by both public and private parties involved in urban transformations projects. The construction of the risk index is obtained through the logical-operative framework that consists into a protocol of 7 ordered and sequential phases. The methodology turns out to be flexible and reproducible and allows for parallel analysis of qualitative and quantitative aspects that in terms of risk undermine the success of projects. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Risk assessment

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Integrating Ecosystem Services Value in the Economic Assessment of Urban Projects. Proposal of an Analytical-Operative Approach 23rd

Integrating Ecosystem Services Value in the Economic Assessm...

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23rd International Conference on Computational Science and Its Applications, ICCSA 2023

作者： Guarini, Maria Rosaria Sica, Francesco Morano, Pierluigi Tajani, Francesco Department of Architecture and Design "Sapienza" University of Rome Rome00196 Italy Department of Civil Environmental Land Building Engineering and Chemistry Polytechnic University of Bari Bari70125 Italy

ISBN: (纸本)9783031371134

Urban project evaluation methods frequently rely on the assessment of costs and benefits that are directly tied to monetary measurement. They do not account for the additional advantages to society and economy that ecosystems, depending on their conditions and in response to rising community need, might provide. What might therefore be developed to support the inclusion of the ecosystem services assessment within the framework of economic evaluation procedures in urban system? The work attempts to offer a viable and adaptable framework capable of guiding private and/or public entities’ actions while also taking into consideration the ecosystem’s advantages, more specifically the ecosystem services. The proposed workflow is constituted by series of steps that support the development of decision-making processes that can assess a single intervention from several perspectives, from environmental to economic in nature. It can support the implementation of economic evaluation strategies that take into account the importance of ecosystem services provided by urban habitats. The research highlights how different land use patterns, socioeconomic systems, and environmental conditions can change the project’s potential to deliver ecosystem services. The conclusions outline the practical implications and the limits of the developed assessment framework. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Ecosystems

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Morphodynamic numerical modelling of bridge pier erosion induced by downstream check-dam partial collapse

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Procedia Structural Integrity 2024年 62卷 601-608页

作者： Matteo Nicolini Polytechnic Department of Engineering and Architecture (DPIA) University of Udine via del Cotonificio 114 Udine 33100 Italy

The paper presents a case study in which a severe bridge pier erosion effect was triggered by a partial collapse of a downstream check-dam, due to a flood event in June 2020. The area under study is about 30 km east from the city of Udine (Italy), along the river Torre, which is the main tributary of the river Isonzo. In particular, it is 1 km downstream of the confluence between river Torre and its main tributary, river Natisone. The hydrodynamic complexity of the reach is further exacerbated by the presence of two bridges, close to each other and almost parallel (the new one is just upstream and it is under construction, although almost finished, while the old one is still in service). The result is that there are many bridge piers in the riverbed, determining some interference effects also increasing local erosion. The presence of a check-dam 600 m downstream of the old bridge had a stabilizing effect in this sense, although it was originally designed as a grade control structure of the river. The flood event determined a partial collapse of such structure, whose central portion was progressively excised by tipping. The backward propagation of the erosion reached the area of the bridges, determining a progressive general lowering of the river bed. As a consequence, many bridge piers of the old bridge were excavated, determining severe conditions for the stability of the structure (the traffic was interrupted). The paper presents the methodology adopted and the main results obtained by hydrodynamic and morphodynamic numerical analyses, which were conducted through a two-dimensional, finite volume, shallow water model able to determine the hydrodynamic fields (water depth and flow velocity) and the evolutionary trends of the river bed, allowing to identify the best retrofitting strategy for the design phase.

关键词： river flood two-dimensional models BASEMENT software case study

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Cooling load characteristics of indoor spaces conditioned by decoupled radiant cooling unit with low radiant temperature

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Building Simulation 2022年第12期15卷 2067-2079页

作者： Yuying Liang Nan Zhang Huijun Wu Xinhua Xu Jianming Yang Gongsheng Huang Department of Architecture and Civil Engineering City University of Hong KongHong KongChina School of Civil Engineering Guangzhou UniversityGuangzhou 510006China Department of Building Environment&Energy Engineering Huazhong University of Science and TechnologyWuhanChina School of Automation Guangdong Polytechnic Normal UniversityGuangzhou 510665China

Decoupled radiant cooling units(DRCUs)are capable of increasing the cooling capacity without increasing condensation risks even using a much lower cooling temperature than conventional radiant cooling units(CRCUs).However,it is unclear whether DRCUs using low radiant cooling temperature will increase the cooling load of the conditioned indoor *** this study,the cooling load characteristics of a thermal chamber conditioned by a DRCU was investigated through developing a steady-state analysis model suitable for both DRCUs and *** total/radiative heat flux,as well as the heat exchange with a thermal manikin and walls were analysed under different surface temperatures of *** effect of the emissivity of the thermal chamber’external wall on the cooling load was also *** indicated that the cooling load under the DRCU was slightly smaller than that under the CRCU when the same operative environment was *** the infrared emissivity of the exterior wall’s inner surface could lead to a significant decrease in the cooling load for both the DRCU and *** decreasing the wall emissivity from 0.9 to 0.1,the total cooling load of the DRCU can be decreased by 8.4%and the heat gain of the exterior wall decreased by 21.6%.This study serves as a reference for developing the analysis model and understanding the load characteristics when DRCUs are used to create the thermal environment for indoor spaces.

关键词： radiant cooling condensation-free computational fluid dynamics cooling load hot and humid climates

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Unveiling the Potential Use of Euler Equations in the Utility Additive Analysis for Mass Appraisal 23rd

Unveiling the Potential Use of Euler Equations in the Utilit...

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23rd International Conference on Computational Science and Its Applications, ICCSA 2023

作者： Tajani, Francesco Sica, Francesco Guarini, Maria Rosaria Morano, Pierluigi Ranieri, Rossana Department of Architecture and Design "Sapienza" University of Rome Rome00196 Italy Department of Civil Environmental Land Building Engineering and Chemistry Polytechnic University of Bari Bari70125 Italy

ISBN: (纸本)9783031371134

Using mass appraisal techniques has become strategically important in case of plans property assets, investments in technical and economic renewals, alienation of structures no longer suitable for public needs. Multiple operators implement mass appraisal procedures for residential properties. The UTility Additive (UTA) approach for mass residential property evaluation is tested in this research. The UTA considers the process of deciding a property's price as a multi-criteria typology, with the market-determining attributes of the property acting as the selection criteria to which be capable of assigning marginal utility functions. The Euler equations technique makes use of a variety of margin utility functions, including logistic, exponential, and linear ones. The purpose of this research is to provide a novel operational paradigm for figuring out a property's value in relation to UTA and optimization roles. We wished to investigate the applicability of the Euler Equation (linear, exponential, logistic) as marginal utility functions in particular. We look at the results of independently applying several marginal utility functions, illustrating the various performance stances toward the price formation process. The conclusions discuss the potential for using Euler equations as utility marginal functions throughout the UTA, with following extensions of the work in view to evaluate the performance of the operative model UTA on real case studies. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Housing

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Seismic retrofitting of a reinforced concrete building with strongly different stiffness in the main directions 14th

Seismic retrofitting of a reinforced concrete building with ...

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14th fib PhD Symposium in Civil engineering, 2022

作者： Frappa, Giada Pauletta, Margherita Polytechnic Department of Engineering and Architecture University of Udine via delle Scienze 206 Udine33100 Italy

ISBN: (纸本)9782940643172

The displacement capacity of the existing reinforced concrete building under study does not satisfy the seismic Italian Code requirements. The modal analysis highlights that the structure has strongly different stiffnesses along its main directions and, in the stiffer one, translation is coupled with torsion. To improve the seismic behavior of the building, it is proposed to install an external steel frame with stiff braces along the side of the structure which is the most deformable due to torsional effect. Conversely, in the orthogonal direction, where the ductility demand is much higher, external steel frames with dissipative braces are used. The effectiveness of the proposed solution is checked by push-over analysis. © 2022, fib. The International Federation for Structural Concrete. All rights reserved.

关键词： Stiffness

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