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Predecessor
Volume 28, Issue 4
Displaying 1-9 of 9 articles from this issue
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Yoshihiko Ohama1990 Volume 28 Issue 4 Pages 5-17
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSConcrete-polymer composites are composite materials which have been developed by improving the properties of conventional cement concrete with polymers. The concrete-polymer composites are classified into polymer-cement (or modified) concrete (mortar), polymer concrete (mortar) and polymer-impregnated concrete (mortar) by different process technology. The present paper reviews the applications of the composites and the recent trends in their research and development according to the above classification.View full abstractDownload PDF (2197K) -
Hiroshi Yamamoto1990 Volume 28 Issue 4 Pages 19-28
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSAesthetic Design of Bridges should be discussed on (1) the beauty of bridge-form and g the harmony between bridge and environment of construction place. In these, the former concerns closely with technique, but latter contains the illogical psychological side. In this paper, taking the position that the moulding beauty of bridges belongs to category of “technical beauty”, aesthetic design of concrete bridges is considered on (a) beauty of form, (b) beauty of function and (c) harmony of bridge and environment.View full abstractDownload PDF (4230K) -
Precast concrete technologies in the integrated construction systemHiroo Takada, Haruo Nakazawa1990 Volume 28 Issue 4 Pages 29-36
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSIn these days, the contractors are making effort for increase efficiency of construction because their market is too prosperous. So they propose various technologies to improve progress of work, and adopt the total system that integrate them. Then, the precast concrete technologies which are the sub-system in that system are recognized as important and general construction methods. This paper shows those precast concrete technologies at the front and the other related technologies.View full abstractDownload PDF (1857K) -
Use of high strength re-bars for the longitudinal reinforcementsR. Tanaka, Y. Tadaki, Y. Kanoh1990 Volume 28 Issue 4 Pages 37-43
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe use of high-strength reinforcement enables to increase the strength of reinforced concrete members as well as to reduce the amount of reinforcing bars. The highest value of the yield strength of re-bars for general use has been limited within 4 000 kgf/cm2 today. Recently, the high-strength reinforcement with a yield strength of more than 10 000 kgf/cm2 is being used for web reinforcement of beams and columns. The high-strength reinforcement is being actively developed in association with the development of high-strength concrete, but the use of high-strength re-bars for longitudinal reinforcement has negative effects such as to reduce stiffness and to tend to cause failure of beam-column joints. Therefore, when the high-strength reinforcement is to be applied, its properties should be sufficiently understood beforehand. This report describes necessary considerations for designing structural members with high-strength reinforcements as longitudinal bars, based on the test results conducted by the authors as well as published in previous literatures.View full abstractDownload PDF (1170K) -
Design and construction of Chuo-Koen foot-bridgeI. Hioki, S. Hiraishi, K. Fushimi, M. Kuwahara1990 Volume 28 Issue 4 Pages 44-52
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThis paper presents design and construction of the bi-prestressed foot-bridge whose depth-span ratio is 1/38. Bi-Prestressing System requires typical post-compressioning prestressing tendons arranged in the upper part of the girder that offset unfavorable axial compressive stresses due to conventional post-tensioning tendons located normally in the lower part of the girder. This system makes the depth of prestressed girder more reduced and gives the best choice when the space below the bridge is not enough.View full abstractDownload PDF (3076K) -
Aerobics City Sports HotelH. Ohba, N. Iwabe, M. Tokunaga, K. Miyamori1990 Volume 28 Issue 4 Pages 53-60
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSRPC System is rigid frame prefabricated reinforced concrete structure system and it was adopted in the project of the general testing building of Institute of Construction Technology, Toda Corporation till now, as reported in Concrete Journal, May 1985. In Aerobics City Sports Hotel introduced here, this system was well planned so as to apply to a high-rise building, the structural experiments using the system were executed and the building has been constructed. As a result of that, it was clarified that the system had effectiveness in the productivity and so on. This building is pure rigid frame structure, having approximately 800 m2 in the standard floor area, the structural form is SRC in BIF-7 F and RPC in 8 F-16 F. In the parts applied with RPC System, columns were cast concrete in situ, girder were made by use of P.C. member and slabs were by use of composite floor panel mainly using half precast panel. The actual construction period for one floor was 8 days. This system contributed to saving manpower of skilled labor and levelling of labor attendant.View full abstractDownload PDF (2860K) -
[in Japanese]1990 Volume 28 Issue 4 Pages 61-71
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (4422K) -
[in Japanese]1990 Volume 28 Issue 4 Pages 79-87
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (1444K) -
1990 Volume 28 Issue 4 Pages 88-90
Published: April 01, 1990
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (519K)
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