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Predecessor
Volume 27, Issue 8
Displaying 1-7 of 7 articles from this issue
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Masanori Izumi1989 Volume 27 Issue 8 Pages 5-17
Published: August 01, 1989
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSMore than twenty buildings with passive response control system, including “base-isolation”, have been constructed up to the present, while, active response control system is now entering the stage of practical use. But their technology have not perfectly been completed yet. Base-isolated device now widely used, which employs laminated rubbers and some types of dampers, do not work well for the certain types of input earthquake wave, especially predominate in longer period, and for vertical direction. Active vibration control system has weak points in the costs and reliability of devices and power supply, but it might be used for partial control of very important things like computers, nuclear power generators and so on, or for control of weak vibration excited by winds. The existing problems to be solved are development of devices and precise estimation of input motions, but the former point may be expected to mechanical engineers. Architectural engineers will do duty as system designers, and use the developed devices for the suitable purpose. Various types of response control system will be used widely in future, not only for earthquake resistant design of structures but also for comfortable and ease feeling of the inhabitants.View full abstractDownload PDF (2890K) -
published by Architectural Institute of JapanToshimi Kabeyasawa1989 Volume 27 Issue 8 Pages 18-26
Published: August 01, 1989
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe Architectural Institute of Japan proposed a new seismic design method for reinforced concrete buildings based on ultimate strength concept, which was published as a draft of design guidelines entitled as above in October 1988. This paper outlines the basic design philosophy, the principles and requirements in the guidelines in comparison with those in the current design code. Background researches for the typical requirements are also presented with several issues in need of further investigation.View full abstractDownload PDF (1769K) -
Access Bridge for Kansai International AirportT. Suzuki, H. Yamanaka1989 Volume 27 Issue 8 Pages 27-37
Published: August 01, 1989
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSIn the construction of the access bridge substructure for Kansai International Airoport, underwater concrete with S.C.A. (Segregation Control Admixture) is used for fixing a prefabricated pier on steel pipe piles which was driven. The underwater concrete with S.C.A. has the following advantages. First, it is controlled to prevent segregation inwater. Second, it keeps strength deterioration underwater at minimum. Third, it is uniform in quality, and has good flowability, fillability and bond strength, that is good for execution of work. The present paper refer mainly to the result of examination in mix proportion test and execution control test, and mix design, quality control and execution control in making use of mass underwater concrete with S.C.A. in construction work.View full abstractDownload PDF (2287K) -
T. Irino, M. Kura, M. Nakabayashi, H. Muroyama1989 Volume 27 Issue 8 Pages 38-46
Published: August 01, 1989
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSGrain silos are required to be airtight since their contents, imported grain, are fumigated in accordance with the plant protection law. Conventional reinforced concrete silos are prone to lose their airtightness because of the deterioration of the concrete by aging. To secure the airtightness, a layer of steel plate is installed inside the reinforced concrete wall of the silo; this steel layer also serves as a structural element of composite structure. The report on the construction of steel lined reinforced concrete silo is presented in this paper. Among the features : 1. The manufacture of the cylinder with 2.3 mm thick steel plate, 2. The construction method by unit form-timbering scaffold system, 3. placing of concrete using small concrete distributer.View full abstractDownload PDF (2217K) -
-LPG Inground Storage Tank in Negishi Works-K. Minegishi, M. Ueno, Y. Hirata, S. Ono, K. Kimura1989 Volume 27 Issue 8 Pages 47-57
Published: August 01, 1989
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe bottom slab of an LPG inground storage tank was mass concrete with 1.45 m in thickness and 36.2 m in diameter and its construction was carried out in the summer time and connected rigidly to the pre-fabricated side wall. Therefore the thermal crack control was major item from the viewpoint of assuring the concrete quality. The pre-cooling method using frozen sand produced by injecting liquid nitrogen was adopted to control the thermal crack on the basis of the results of studies. The pre-cooled concrete of appx. 1500 m3 was placed and consequently no thermal cracks actually induced. The study on thermal crack control measures for the bottom slab and the actual planning/construction utilizing the pre-cooling method using liquid nitrogen are described in this paper.View full abstractDownload PDF (1940K) -
[in Japanese]1989 Volume 27 Issue 8 Pages 58-67
Published: August 01, 1989
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (5802K) -
[in Japanese], [in Japanese], [in Japanese]1989 Volume 27 Issue 8 Pages 103-114
Published: August 01, 1989
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (2074K)
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