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Journal of Structural and Construction engineering 2022年第799期87卷 912-920页

作者： Kiryu, Satoru Hotta, Hisato Course of Architecture and Building Engineering Architecture and Building Engineering Environment and Society Tokyo Institute of Technology Japan

This study discusses the column overdesign factor required to prevent story collapse in 6- and 9-story RC structures with multi-story shear walls. Time history response analysis was conducted by changing the column overdesign factor from 0.8 to 2.0 by 0.2. As a result, for a 6-story frame, column overdesign factor of 1.2 was required, whereas for a model including shear walls a value of 1.4 was required in order of the strength of shear walls. These values may be reduced by 0.2 to 0.6, depending on the allowable rate of change of the maximum story drift angle. © 2022 Architectural Institute of Japan. All rights reserved.

关键词： Shear walls

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Relationship between strength properties and restrained expansion strain of high-fluidity ductile-fiberreinforced concrete using recycled aggregate with expansive additive 31st

Relationship between strength properties and restrained expa...

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31st International Ocean and Polar engineering Conference, ISOPE 2021

作者： Anzai, Takumi Watanabe, Ken Sato, Hidekazu Course of Architecture and Civil Engineering School of Engineering Graduate School Tokai University Kanagawa Hiratsuka Japan Department of Architecture and Building Engineering School of Engineering Tokai University Kanagawa Hiratsuka Japan

ISBN: (纸本)9781880653821

In this study, we sought to evaluate the relationship between strength properties and expansion strain of high-fluidity ductile-fiber-reinforced concrete using recycled aggregate (R-HFDFRC), we conducted a compressive test, trisecting-point bending test and restrained expansion test on the *** a result, within the range that shows about the same strength properties as R-HFDFRC of the same mix proportion without using expansive additive or shrinkage reducing admixture, when LB is used alone, the amount of shrinkage strain reduction is expected to be about 700 µ. When CSA is used alone, the amount of shrinkage strain reduction is expected to be about 750 µ. © 2021 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Expansion

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Investigation for hole wall position of root hardening diameter in bored pile by using resistivity method

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AIJ Journal of Technology and Design 2020年第64期26卷 887-892页

作者： NIINA, Masahide KODAMA, Takayuki CHIKUSA, Nobuyuki KODERA, Mitsuru WATANABE, Ken FUJII, Mamoru Dept. of Course of Science and Technology Tokai Univ. Japan Nippon Concrete Industries Co. Ltd. Japan Dept. of Architecture and Building Engineering Tokai Univ. Japan Tokai Univ. Japan

The possibility of the method of measuring root hardening diameter was investigated by using resistivity. In this study, laboratory experiments and in-site experiments were conducted. The electrode arrangement is a 4-pole method. As a laboratory experiment, we investigated the relationships between the resistivity and the boundary position of the formation, exploration depth. Based on the results, measuring method using resistivity for in-site was developed. And it was conformed that the resistivity was extremely effective to measure the diameter of foot protection in the site. © 2020 Architectural Institute of Japan. All rights reserved.

关键词： Hardening

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Trial production of life cycle assessment tool for housing design considering usage by client at initial design stage

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AIJ Journal of Technology and Design 2016年第52期22卷 1041-1044页

作者： Ike, Takahiro Asano, Koichi Hasegawa, Kenichi Kanno, Hideto Murata, Ryo Miyaoka, Futoshi Kaneko, Naoshi Graduate School Course of Joint in Life Cycle Design Engineering Akita Prefectural Univ. Japan Dept. of Architecture and Environment System Faculty of Systems Science and Technology Akita Prefectural Univ. Japan Dept. of Architecture and Building Engineering Tokyo Institute of Technology Japan Dept. of Machine Engineering Nihon Univ. Japan ESTEC Design M. Design Eng. Japan

In this study, we investigated on trial production of life cycle assessment (LCA) tool for using by clients at the initial stages of housing design. The utility of LCA input items were examined. Based on examination r... 详细信息

关键词： Life cycle

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Energy reduction rate in a hospital: Examination of the correction method for the energy consumption reduction rate with consideration for the temperature difference in the hospital

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AIJ Journal of Technology and Design 2016年第50期22卷 183-187页

作者： Tsunoda, Kenichi Asano, Yoshiharu Takamura, Hideki Iwai, Kazuhiro Hara, Eiji Takaguchi, Hiroto Kametani, Shigeki Matsunawa, Katashi Sakamoto, Yuzo Bougaki, Kazuaki Murakami, Shuzo TAISEI Corporation Japan Institute of Engineering Academic Assembly Shinshu Univ. Japan Institute of Mountain Science Interdisciplinary Cluster for Cutting Edge Research Shinshu Univ. Japan Architecture Course School of Science and Technology Kokushikan Univ. Japan Faculty of Science and Engineering Waseda Univ. Japan Ocean Sciences Tokyo Univ. of Marine Science and Technology Japan Nikken Sekkei Research Institute Japan Building Research Institute Japan Tokyo City Univ. Japan Institute for Building Environment and Energy Conservation Japan

The environmental impact and energy consumption database is used for reducing carbon dioxide effectively in commercial buildings. This study is a part of a project that aims at the development of the database for energy consumption of commercial buildings in Japan. This paper describes the correction method for the primary energy consumption reduction rate with consideration of a temperature change at a hospital from 2010 to 2013.

关键词： Energy utilization

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Quality control of fresh deep mixing soil using electrical resistivity method

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AIJ Journal of Technology and Design 2015年第48期21卷 545-550页

作者： Takechi, Kotaro Fujii, Mamoru Gao, Yuanhao Arai, Mauricio Jun Japan Home Shield Co. Ltd. Japan Dept. of Architecture and Building Engineering Search Institute Tokai Univ. Japan Course of Science and Technology School of Science and Technology Tokai Univ. Japan System Measure Co. Ltd. Japan

The deep-mixing soil stabilization method creates improved soilcement columns. The quality of the improved ground must be evaluated constantly. The conventional methods are applied a considerably long time after the completion and depend on the results of tests, necessary for reworks. The applicability of resistivity methods have been developed and studied for evaluating the quality variations of improved ground immediately after the construction. This resistivity method is based on the axial resistivity changes of a cone sensor inserted in the hardening body. As a result, it was proven to be effective in the evaluation of soil-cement columns.

关键词： Quality control

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Evaluation of the fine fraction content using electrical logging method

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AIJ Journal of Technology and Design 2015年第48期21卷 557-562页

作者： Gao, Yuanhao Fujii, Mamoru Mochida, Yasuhide Takechi, Kotaro Adachi, Yukio Graduate School of Earth and Environmental Science Course of Earth and Environmental Science Tokai Univ. Japan Dept. of Architecture and Building Engineering Tokai Univ. Japan Dept. of Architecture and Urban Design Ritsumeikan Univ. Japan Ground Analysis Section Japan Home Shield Co. Ltd. Japan Control Systems Division Nitto Seiko Co. Ltd. Japan

SWS test is widely used as a research method to evaluate the residential sites. Advantage of SWS test is possible to evaluate the bearing capacity of residential sites. On the other hand, a disadvantage of SWS test is to determine soil and groundwater level. Suppose that if it is possible incorporate the determination method of the soil by electrical resistivity using SWS test holes, a lot of information will be gained. As an ideal way, the electrical logging method by the electrode to the SWS test hole, is effective. Based on the above background, it was cleared that the evaluation of fine fraction content of soil was possible by electrical resistivity from the laboratory test. And the estimation equation was completed. In this study, field experiments of the six sites were performed to confirm the accuracy of the estimation equation from the laboratory test.

关键词： Soils

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Estimation of fine fraction content in soil by electrical resistivity

Estimation of fine fraction content in soil by electrical re...

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24th International Ocean and Polar engineering Conference, ISOPE 2014 Busan

作者： Gao, YuanHao Mamoru, Fujii Course of Science and Technology School of Science and Technology Tokai University Hiratsuka Kanagawa Japan Department of Architecture and Building Engineering Tokai University Hiratsuka Kanagawa Japan

ISBN: (纸本)9781880653913

Swedish Weight Sounding test is widely used as a research method to evaluate the residential sites. Advantage of Swedish Weight Sounding test is the ability to evaluate the bearing capacity of residential sites. On the other hand, a disadvantage of Swedish Weight Sounding test is inability to determine the soil and groundwater level. The determination of the soil is based on the experience of the operator. Information obtained from the results of the Swedish Weight Sounding test is insufficient to evaluate the residential ground. Suppose that if it is possible to incorporate the determination method of the soil by electrical resistivity using Swedish Weight Sounding test holes, a lot of information will be gained. As an ideal way, the electrical logging method by the electrode to the Swedish Weight Sounding test hole is effective. The purpose of this study is intended to clearly determine the classification of soil due to electrical logging method by Swedish Weight Sounding test hole. The experiment is divided into in-situ and laboratory experiments. However, the result of laboratory experiments is not clear whether the results can be applied to the measurement of electrical resistivity in natural ground. To establish a method of electrical logging using Swedish Weight Sounding test hole, a ground survey will have been done to determine the ground liquefaction of residential sites. As a basic research, the authors attempted to clarify the evaluation method of soil fine fraction content by using the electrical resistivity using a sample soil of 57 types of laboratory experiments. In this experiment, portable electric conductivity meter was used in laboratory experiment. From the laboratory test, a formula to estimate the fine fraction content of soil was proposed. Further, as situ testing, an SWS test was conducted. After SWS test hole was filled with various kinds of KCL solution, electrical resistivity was measured. As a result, it was found that the formula on the

关键词： Soils

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The trend of changes of the finishing materials in the home kitchen: The morphological changes of the kitchen analyzing the authorized textbooks on domestic science for girls' high school in prewar Japan

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AIJ Journal of Technology and Design 2014年第45期20卷 785-790页

作者： Suzaki, Fumiyo Uchida, Seizo Yasuno, Akira The Course of Architecture and Building Engineering School of Engineering Kanagawa Univ Japan Dept. of Architecture Kanagawa Univ Japan Faculty of Art and Design Dept. of Architecture and Interior Bunka Gakuen Univ Japan

This paper aims to report the trend of changes of the finishing materials used for floor, walls, ceiling, and the parts around the sink and oven in the home kitchen analyzing the descriptions in the authorized textbooks on domestic science from Meiji to early Showa era. The expressions about the finishing materials started to describe from 1909, and increase after mid-Taisho era. After that, especially after 1928, the new materials- tiles, artificial stone, and concrete - were described frequently. In general, those expressions of materials in the textbooks meant the development of the concept of hygiene to the specific morphology.

关键词： Textbooks

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Seismic behavior of reinforced concrete structural walls based on the Japanese domestic research efforts 10

Seismic behavior of reinforced concrete structural walls bas...

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10th U.S. National Conference on Earthquake engineering: Frontiers of Earthquake engineering, NCEE 2014

作者： Kono, S. Kabeyasawa, T. Sanada, Y. Sakashita, M. Nishiyama, M. Ichinose, T. Takahashi, S. Tani, M. Fukuyama, H. Materials and Structures Laboratory Tokyo Institute of Technology Japan Earthquake Research Institute Univ. of Tokyo Japan Course of Architectural Engineering Osaka Univ. Japan Department of Architecture and Architectural Engineering Kyoto Univ. Japan Dept. of Architecture Civil Eng. and Industrial Management Eng. Nagoya Inst. of Technology Japan Building Research Institute Japan

A national research project has been carried out since 2008 to revise the Japanese building Standard Law. Among more than fifty subjects as of 2012, ten subjects are related to reinforced concrete structures. Behavior of structural walls is one of the main issues studied in this project. The authors carried out series of experiment on structural walls in 2011 and 2012 in order to study the ultimate drift capacity. The authors tested fifteen symmetric specimens and five asymmetric specimens with 25-40 % scale. Test variables involved wall section geometry, reinforcement details of section end, axial force level, and presence of out-of-plane force. Nearly all specimens yielded first and failed due to crushing of concrete at wall toes as designed. The ultimate drift capacity generally increased as axial load level decreased, the size of confined end region increased, the amount of confining reinforcement increased, and shear span ratio increased. The ultimate drift capacities were simulated with combining a simple fiber flexural model and trilinear shear spring model. If the plastic hinge length were properly assumed, the simulated ultimate drift capacity was sufficiently accurate for practical design.

关键词： Geometry

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