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DERIVATION OF AVERAGE DIRECT DAYLIGHT FACTOR BY STANDARD OVERCAST SKY

Journal of Environmental engineering (Japan) 2024年第823期89卷 548-553页

作者： Hara, Naoya Dept. of Architecture Faculty of Environmental and Urban Engineering Kansai University Japan

Under the uniform sky, the direct illuminance and incident luminous flux of each rectangular surface in a cuboid space with rectangle window can be easily calculated using the average direct daylight factor which is the form factor of the illuminated surface relative to the aperture surface. This paper presents a method for deriving the average direct daylight factor under the overcast sky between two basic rectangular surfaces and the result of derivation. This allows us to calculate the average direct daylight factor of the rectangular surface in a cuboid space, using a method like that under the uniform sky. © 2024 Architectural Institute of Japan. All rights reserved.

关键词： Daylighting

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IMPLEMENTATION OF HARDENING RULE WITH MEMORY SURFACE IN FINITE ELEMENT ANALYSIS TO DESCRIBE CYCLIC BEHAVIOR OF STRUCTURAL STEEL MATERIALS

Journal of Structural and Construction Engineering

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Journal of Structural and Construction engineering 2025年第829期90卷 344-353页

作者： Sato, Yoshiharu Itabashi, Suguru Jiao, Yu Dept. of Architecture Graduate School of Engineering The University of Tokyo Japan Dept. of Architecture Faculty of Architecture and Urban Design Tokyo City University Japan

This study presents a formulation method for implementing a material constitutive model using a memory surface in finite element analysis, capable of accurately reproducing the cyclic hardening and softening behavior of SN490B structural steel under constant strain amplitude. The formulation employs an implicit discretization method, specifically the backward Euler method. For solving plastic multipliers, elastic predictors and plastic correctors are used. Additionally, to ensure the convergence and stability of the nonlinear analysis, the derivation of the consistent tangent modulus tensor is demonstrated. The validity of the modeling method was verified through finite element analysis. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Steel analysis

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DEVELOPMENT OF DAYLIGHT DEVICE WITH VARIABLE OPTICAL PROPERTIES USING NEAR-INFRARED ABSORBING REFLECTORS

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AIJ Journal of Technology and Design 2025年第77期31卷 317-321页

作者： Ito, Daisuke Shinohara, Naoko Dept. of Architecture Faculty of Architecture NIPPON Institute of Technology Japan Dept. of Architecture and Building Engineering School of Architecture and Urban Planning Tokai Univ Japan

The purpose of this study is to develop a daylight device with variable optical properties using near-infrared absorbing reflectors that can provide adequate solar radiation shielding or solar heat utilization during daylight use throughout the year. By using a thermal barrier coating agent, a near-infrared absorbing reflector with high visible reflectance and low solar reflectance was created. The results of the light duct model experiment showed that daylight could be taken in stably, and solar radiation could be taken in at the solar altitude in the winter and shielded at the solar altitude in the summer. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Thermal barrier coatings

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CYCLIC HARDENING AND SOFTENING BEHAVIOR OF SN490B STEEL

Journal of Structural and Construction Engineering

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Journal of Structural and Construction engineering 2024年第821期89卷 788-797页

作者： Sato, Yoshiharu Jiao, Yu Dept. of Architecture Graduate School of Engineering The University of Tokyo Japan Dept. of Architecture Faculty of Architecture and Urban Design Tokyo City University Japan

To investigate the cyclic hardening and softening behavior of SN490B steel, constant axial strain amplitude cyclic loading tests were conducted using round bar specimens with strain amplitudes ranging from 0.25% to 13.5% for fully reversed loading. The following results were obtained. When the strain amplitude is smaller than 0.50%, cyclic softening behavior is observed, and when the strain amplitude is larger than this, cyclic hardening behavior is observed. Cyclic hardening and softening behavior can be explained by the expansion and contraction of the elastic range. The expansion and contraction of the elastic range depends on the strain amplitude. © 2024 Architectural Institute of Japan. All rights reserved.

关键词： Building materials

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MODELING OF CYCLIC PLASTIC BEHAVIOR OF SN490B STEEL USING HARDENING RULE WITH MEMORY SURFACE CONCEPT

Journal of Structural and Construction Engineering

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Journal of Structural and Construction engineering 2024年第826期89卷 1449-1458页

This study proposes a material constitutive model using a memory surface concept to accurately replicate the cyclic hardening and softening behaviors of SN490B structural steel under constant strain amplitude loading. The model combines isotropic and kinematic hardening rules, accounting for strain amplitude dependency in both hardening rules. The isotropic hardening rule includes hardening and softening mechanisms, enabling the accurate reproduction of cyclic hardening and softening behaviors dependent on strain amplitude. This approach successfully replicates the stress–strain relationship of the tested material. © 2024 Architectural Institute of Japan. All rights reserved.

关键词： Strain hardening

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A tailored model to measure the resilience of north coastal communities at risk in Nile Delta

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HBRC Journal 2025年第1期21卷 99-126页

作者： Hisham, Mohamed A. Bakr, Sawsan E.Y. Elshahed, Fahima M.S.E. Department of Architecture Faculty of Engineering Cairo University Giza Egypt Faculty of Engineering Cairo University Giza Egypt General Organization for Physical Planning Ministry of Housing Utilities and Urban Communities Cairo Egypt

As a result of growing climate change, coastal communities frequently face unexpected natural disasters. The resilience of communities has gained importance in international development discourse over the past decade. Models for gauging community resilience exist, and some of them are applied in coastal Egypt. The communities in the Delta region overlooking the Mediterranean are unique and require a more detailed model to measure their resilience to sea-level rise (SLR) and shoreline erosion. The paper highlights the definition of resilience and vulnerability, characteristics of resilient communities, environmental pressures and the vulnerability of Mediterranean Sea coastal areas, and the selection of the Nile Delta area to apply the proposed measurement model. Last but not least, the proposed resilience model is achieved through deduction by reviewing various methods and models used globally and in Egypt and extracting indicators of assessment, setting relative weights for indicators and their aspects through polling 50 urban experts, and analyzing results using the analytical hierarchy process (AHP). The proposed model included 41 weighted indicators classified to unique and general indicators covering six aspects. The model’s measurement scale (0–100). Finally, the assessment shows that Borg El-Burullus, in the Delta Coast’s second zone, has moderate resilience (46.6%) but faces challenges in economic diversification, governance, infrastructure, and data availability, limiting effective resilience strategies. To address these issues, targeted policies, improved data availability, enhanced governance, investments in environmental protection, community engagement, and economic diversification are critical for building community resilience. © 2025 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

关键词： Tailored model measure resilience vulnerability coastal communities Nile Delta

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Identifying the influence of demography and familiarity on public attitude toward low-income housing

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City, Territory and architecture 2025年第1期12卷 1-21页

作者： Ramzanpour, Mehrnaz Sharghi, Ali Nourtaghani, Abdolmajid Faculty of Arts and Architecture Department of Architecture University of Mazandaran Babolsar Mazandaran Iran Faculty of Architecture and Urban Planning Shahid Rajaee Teacher Training University Tehran Iran Faculty of Engineering Department of Architecture Golestan University Gorgan Golestan Iran

Aim: The study aims to explore the relationship between “familiarity” and “demography” and the public attitude toward low-income housing and its residents;due to controlling the stigma and having more stable mixed residential neighborhoods. Method: To extract the attitude characteristics, a systematic review was conducted and the survey was performed using an online questionnaire for non-residents. Exploratory factor analysis revealed 11 factors within three dimensions of attitude. Correlation and confirmatory factor analysis were then used to examine the relationship between attitude, familiarity, and demographics. Results: Familiarity was directly associated with some cognitive and behavioral factors. Among the demographic factors, no significant relationship was found between gender and attitude. Direct and indirect relationships were found between age, education, income, duration of residence, place of residence, and tenure type with cognitive, affective, and behavioral factors. The results showed that lower socio-economic characteristics of outsiders lead to more positive attitudes, and the higher the familiarity and experience of people regarding low-income housing and its residents, the better their attitude. Conclusion: To create social mix projects that promote pleasant feelings and desirable behavior, it is necessary to accurately determine the demographic characteristics of socio-economic groups. © The Author(s) 2025.

关键词： Attitude Demographics Familiarity Low-income housing Stigma

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Integrating flood and earthquake resilience:a framework for assessing urban community resilience against multiple hazards

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Journal of Safety Science and Resilience 2024年第3期5卷 330-343页

作者： Zahra Ahmadi Mahdi Ghasemi Amir Reza KHAVARIAN-GARMSIR Mohammad Ahmadi Urbanism Department Faculty of Art&ArchitectureYazd UniversityYazdIran Faculty of Art and Architecture Departnent of ArchitectureYazd UniversityYazdIran Department of Geography and Urban Planning Faculty of Geographical Sciences and Planning University of IsfahanIsfahanIran Department of Civil Engineering Tabriz BranchIslamic Azad UniversityTabrizIran

Floods and earthquakes are the most common natural disasters,causing significant damage and casualties in urban *** academic research has focused on assessing cities'ability to withstand these natural disasters,there is a lack of established frameworks for evaluating resilience against multiple *** research integrates the earthquake and flood resilience indicators to create a comprehensive resilience assess-ment *** study integrated seismic and flood resilience indicators and categorized them into 27 *** also used the DEMATEL(Decision-Making Trial and Evaluation Laboratory)method to determine the significance of clusters and prioritize *** research identified 13 cause clusters and 14 effect clusters of indicators for seismic and flood ***‘response capacity'cluster has the most impact on seismic and flood resilience,while the‘transportation and accessibility'cluster is the most affected *** article presents a framework for evaluating flood and seismic resilience and makes suggestions for future research.

关键词： Resilience Flood Earthquake Dematel Resilience assessment Multiple Hazards

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Perforated building envelopes based on a parametric approach: a conceptual framework to improve indoor environmental quality

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City, Territory and architecture 2025年第1期12卷 1-35页

作者： Fawaz, Marwa Megahed, Naglaa Ali El-Mowafy, Basma N. Elgheznawy, Dalia Architecture and Urban Planning Department Faculty of Engineering Port Said University MI Port Said 42526 Egypt

One trend in building design is building envelopes with perforated patterns, which create a sculptural envelope using parametric and generative design tools to adapt to environmental conditions and user preferences. However, there are gaps in understanding the potential benefits of perforated building envelopes (PBEs) and their key design parameters used in contemporary projects. Therefore, this study aims to examine the classification of PBE design parameters and their commonly used parametric design tools that provide appropriate indoor environmental quality (IEQ) for buildings. The study is based on (1) a review of relevant studies, and (2) an analysis of case studies of contemporary projects. The results reveal relationships between key design variables of contemporary PBEs based on a conceptual framework developed in terms of (a) general building properties, (b) detailed envelope properties, and (c) environmental performance indicators. This study contributes to the field of architecture by providing a design strategy for creating PBEs based on a parametric approach and highlights the importance of considering IEQ in the early digital modelling process. By applying the five-stage strategy: creativity, configuration, generation, performance, and evaluation, it was found that PBEs can be a powerful tool to enhance energy efficiency by about 26.91% compared to glazed envelopes in Egypt, which may lead to improved IEQ. Future research could apply the proposed strategy to explore the impact of PBEs on various IEQ indicators. © The Author(s) 2025.

关键词： Conceptual framework Design strategy Indoor environmental quality Parametric approach Perforated building envelopes

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EFFECTS OF REPRODUCING DAYLIGHTING ENVIRONMENT IN WORKSPACES USING ELECTRIC LIGHTING EQUIPMENT

Journal of Environmental Engineering (Japan)

引用

Journal of Environmental engineering (Japan) 2025年第828期90卷 78-88页

作者： Shinohara, Naoko Akuzawa, Yuka Yoshizawa, Nozomu Oe, Yuki Nakaso, Marie Kaiho, Koichi Dept. of Architecture and Building Engineering School of Architecture and Urban Planning Tokai University Japan Dept. of Architecture Graduate School of Engineering Tokyo University of Science Japan Dept. of Architecture Faculty of Engineering Tokyo University of Science Japan Dept. of Living Design The University of Shiga Prefecture Japan Nikken Sekkei Ltd Japan

The purpose of this study was to determine whether it is possible to obtain the same psychological (impression of lighting environment, atmosphere and workability) and physiologic (stress effects by heart rate variability) effects of a daylighting environment by reproducing daylighting using electric lighting equipment in workspaces. The results suggested that spectral distribution and chromaticity with reproducing daylighting environment may not affect both psychological and physiological effects. The influence of a view, the results suggest that if the vertical illuminance is more than 300lx with reproducing daylighting environment, the view may not be necessary from both psychological and physiological perspectives. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Physiological models

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