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STUDY ON THE MECHANICAL PERFORMANCE OF PRESSURE WELDED JOINTS OF STEEL BARS USING PROPANE GAS

AIJ Journal of Technology and Design 2025年第77期31卷 13-18页

作者： Castro, Juan Jose Omi, Shogo Dept. of Architecture and Building Engineering Faculty of Engineering Univ. of the Ryukyus Japan

Gas pressure welding using acetylene gas is a widely used method for rebar jointing in modern construction. However, the increasing production and transportation costs of acetylene gas have made its use less favorable, particularly in remote areas. To address these challenges, a novel gas pressure welding method has been developed, utilizing the readily available and cost-effective propane gas, commonly used in households. This study conducted tensile and bending tests to elucidate the mechanical properties of the welded steel bar joints using propane gas. The results demonstrated the new method meets the performance regulations for gas pressure welding Class A joints. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Bending tests

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STUDY ON MATERIALIZATION OF THE PHILOSOPHY IN DESIGN PROCESS OF JAPAN’S FIRST COMMUNITY SUPPORTED HOSPICE FOR CHILDREN - A case study of architecture supporting well-being -

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AIJ Journal of Technology and Design 2025年第77期31卷 438-443页

作者： Deguchi, Ryo Onoda, Yasuaki Tsukuda, Haruka Dept. of Architecture and Building Science Graduate School of Engineering Tohoku Univ Japan

The purpose of this study is to clarify how the space was materialized by focusing on the design process of TSURUMI Children’s Hospice. In the process, opinions were expressed from diverse perspectives on the architectural design, some of which differed from the priorities based on the philosophy. As an unprecedented building type, community supported hospice for Children differs in philosophy and purpose from conventional facilities that prioritize functional configuration. The difference in perception was considered a factor in the conflicts of opinions. These conflicts were resolved by devising both of the operation and architectural space based on priorities. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Architectural design

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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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A STUDY ON STRUCTURE OF WIND VELOCITY DISTRIBUTION AND CORRESPONDING PRESSURE DEFICIT CHARACTERISTICS UNDER THE TORNADO-LIKE WIND FLOW AFFECTED BY SURFACE ROUGHNESS

Journal of Structural and Construction Engineering

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Journal of Structural and Construction engineering 2025年第827期90卷 15-26页

作者： Kikitsu, Hitomitsu Okuda, Yasuo Takadate, Yuki Building Department National Institute for Land and Infrastructure Management Japan Dept. of Architecture Faculty of Science and Engineering Setsunan University Japan Dept. of Structural Engineering Building Research Institute Japan

In this study, PIV and wind pressure experiments were carried out under tornado-like wind flow affected by surface roughness. The authors discussed the effects of swirl ratio and roughness density on the velocity field and the pressure deficit characteristics near the surface. It was confirmed that the velocity field structure gradually transitioned by changing swirl ratio and roughness density. Next, the pressure deficit characteristics showed that the measured pressure was the lowest when the roughness density was 0.014 at any swirl ratio. In the above discussion, the models on the radial velocity distribution and the pressure deficit distribution were proposed. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Wind stress

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STRUCTURAL PERFORMANCE EVALUATION OF MEMBERS REQUIRED TO ASSESS THE SEISMIC RESILIENCE PERFORMANCE OF buildingS

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AIJ Journal of Technology and Design 2025年第77期31卷 246-251页

作者： Mochizuki, Yuto Mukai, Tomohisa Sakasita, Masanobu Mizukami, Ryouta Hirosawa, Miyu Kinugasa, Hideyuki Dept. of Architecture Tokyo Univ. of Science Japan Building Dept. National Institute for Land and Infrastructure Management Japan Dept. of Structural Engineering Building Research Institute Japan Tokyo Univ. of Science Japan

In recent years, there has been a growing demand for seismic resilient buildings that not only have the ability to prevent collapse in the event of a severe earthquake, but also have the ability to reduce or control damage and repair quickly. Therefore, it is necessary to establish an index to evaluate the damage and repair performance of components in order to assess their post-earthquake functional use. In this paper, we present a method to evaluate the damage and repair performance of full-scale beam specimens with high seismic resilience technology by conducting experiments. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Repair

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STUDY ON THE CHANGES IN HUMAN AND PHYSICAL ENVIRONMENTS IN SUPPORT FACILITIES FOR PERSONS WITH DISABILITIES - Changes in Resident Characteristics and Support Needs at Facility A -

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AIJ Journal of Technology and Design 2025年第77期31卷 398-403页

作者： Kajikawa, Ryusei Irisa, Natsumi Koga, Masayoshi Yamada, Asuka Architecture and Building Engineering Graduate School of Science and Technology for Future Life Tokyo Denki Univ Japan Dept. of Arch School of Science and Tech. for Future Life Tokyo Denki Univ Japan

This study aims to examine the ideal state of facilities in the era of community coexistence, taking into account the historical context of deinstitutionalization. It will elucidate the attributes of residents at Facility A, such as age, type and degree of disability, the support systems in place, the usage of the building environment, and the changes in relationships with the community. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Disabled persons

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STROLLOLOGICAL INTERVENTION INTO EVERY DAY URBAN ENVIRONMENT OF SHITAMACHI NEIGHBORHOOD, TOKYO – A report on "PARK-PLATZ" as part of "URBAN WALKS", a regional project by the Goethe-Instituts East Asia –

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AIJ Journal of Technology and Design 2025年第77期31卷 556-561页

作者： Gross, Anne Gross, Sebastian Tamura, Masamichi Tsukamoto, Yoshiharu Dept. of Architecture and Building Engineering Tokyo Institute of Technology Japan Studio GROSS Japan Doctoral Student of Architecture and Building Engineering Tokyo Institute of Technology Japan Dept. of Architecture and Building Engineering Tokyo Institute of Technology Japan

The "PARK-PLATZ" project was part of the "URBAN WALKS" regional project initiated by the Goethe Institutes East Asia. The project applied "Strollology - the Science of Walking," a German walking-based methodology that utilizes site-specific interventions. A one-day walking event temporarily transformed public parking lots with a particularly designed device, the PARK-PLATZ Vehicle. It involved a larger public group walk in a shitamachi neighborhood of Tokyo. The report clarifies Strollology and how it enables participants to re-imagine urban configurations and norms through unconventional behaviors and its effect on self-transformation. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Parks

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An Optimization Study on the Concept and Evaluation Methods of Residential Areas' building Shadow Ratio

An Optimization Study on the Concept and Evaluation Methods ...

引用

2024 International Conference on Construction and Real Estate Management: ESG Development in the Construction Industry, ICCREM 2024

作者： Xu, Yanfang Jia, Lingkun Dept. of Architecture School of Architecture and Civil Engineering Xiamen Univ. Xiamen China Dept. of Architecture School of Architecture and Civil Engineering Fujian Province Univ. Key Laboratory of Intelligent and Low-Carbon Building Technology Xiamen Key Laboratory of Integrated Application of Intelligent Technology for Architectural Heritage Protection Xiamen Univ. Xiamen China

ISBN: (数字)9780784485910

ISBN: (纸本)9780784485910

building shadow ratio is an essential indicator in the design of the thermal environment of residential areas in hot and humid regions, and a reasonable quantification of building shadows can accurately assess the shading status of the residential areas. The study analysed the relationship between building shadow ratio (gBSR), sky view factor (SVF), temperature (ground surface, air, and mean radiant temperatures), and thermal comfort index (UTCI). The results show that (1) there is a strong negative correlation between gBSR and SVF;(2) there is also a strong correlation between gBSR, SVF, and temperature and thermal comfort, but gBSR is stronger explanatory for UTCI than SVF;and (3) as SVF increases, or gBSR decreases, AT rises almost throughout the daytime, whereas GST, mRT, and UTCI are all on the rise during the daytime and then will gradually decrease. The study provides new methods for optimising the thermal environment of settlements from the perspective of building shadow. © ASCE.

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WIND PRESSURE MEASUREMENTS AND SCATTERING EXPERIMENTS ON TILED ROOFS USING A FULL-SCALE SEVERE STORM GENERATOR

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AIJ Journal of Technology and Design 2025年第77期31卷 121-126页

作者： Takadate, Yuki Okuda, Yasuo Kikitsu, Hitomitsu Dept. of Structural Engineering Building Research Institute Japan Dept. of Architecture Faculty of Science and Engineering Setsunan Univ Japan Building Dept. National Institute for Land and Infrastructure Management Japan

Wind pressure measurements and scattering experiments were conducted using a full-scale severe storm generator (FSSG). First, scaled experiments were performed using a turbulent boundary layer wind tunnel to confirm the similarity of the wind pressure distributions on a full-scale model using the FSSG. Subsequently, J-shaped tiles that can measure surface wind pressures were fabricated using a 3D printer, revealing the wind pressure characteristics acting on roof tiles. Finally, scattering experiments were conducted using J-shaped and flat-shaped tiles for representative wind directions, and the results were presented. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Wind tunnels

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An IoT-Based System for Lifecycle-Wide Carbon Emissions Assessment in Prefabricated Construction

An IoT-Based System for Lifecycle-Wide Carbon Emissions Asse...

引用

2024 International Conference on Construction and Real Estate Management: ESG Development in the Construction Industry, ICCREM 2024

作者： Zhang, Boyu Shen, Geoffrey Qiping Wu, Hengqin China Academy of Building Research Beijing China Dept. of Building and Real Estate Hong Kong Polytechnic Univ. Hong Kong School of Civil Engineering and Architecture Zhejiang Sci-Tech Univ. Hangzhou China

ISBN: (数字)9780784485910

ISBN: (纸本)9780784485910

Given the recognized capacity of prefabricated construction (PC) to minimize carbon emissions (CEs), there is a growing imperative for the establishment of comprehensive monitoring systems. Traditional monitoring methodologies have been limited to assessing CEs in discrete segments of prefabricated construction, often neglecting the intricacies of prefabricated and recyclable processes, which is a barrier to the deployment of effective CE mitigation strategies. Addressing this deficiency, the current investigation introduces an IoT-enabled system designed to quantify CEs throughout the entire lifecycle of prefabricated construction. The focus of this system is on the lifecycle stages with significant CE implications, thereby enabling thorough tracking of emissions particularly within prefabricated and recyclable operations. A bespoke CE quantification model, pertinent to the lifecycle of prefabrication, has been formulated, laying the analytical groundwork for the monitoring system. The utility of IoT technology in this context is scrutinized via case study analyses, which serve to substantiate the system's practicality and impact. The findings illustrate an enhanced precision in monitoring efforts, with a successful integration of a wide array of CE-related activities within the prefabricated construction domain into the IoT-based system. © ASCE.

关键词： Carbon cycle

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