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Predecessor
Volume 33, Issue 2
Displaying 1-7 of 7 articles from this issue
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Tsuneo Okada1995 Volume 33 Issue 2 Pages 5-10
Published: February 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSRecent earthquake damage and earthquake countermeasures are reviewed. History of seismic design methods, seismic capacity evaluation, and seismic strengthening of existing buildings are described rather in detail comparing their effectiveness with earthquake damage.View full abstractDownload PDF (966K) -
Kazuo Otsuka1995 Volume 33 Issue 2 Pages 11-19
Published: February 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSAlmost 100 prestressed concrete cable stayed bridges had been constructed in Japan. Design techniques had greatly developed, and the standard for prestressed concrete cable stayed bridges had been established. In this article, the present techniques of the design for prestressed concrete cable stayed bridges are introduced along with the examples of constructed bridges. This kind of bridges such as extra-dosed prestressed concrete bridge and prestressed concrete bridge with prestressed concrete stays are also reported.View full abstractDownload PDF (3407K) -
Yasukazu Takahashi, Michihiko Abe1995 Volume 33 Issue 2 Pages 20-28
Published: February 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSNowadays it becomes necessary to demolish a lot of structures for maintenance and renewal of a huge amount of construction stock. Because of the increase of demolished concrete and the lack of disposal place for it, the reuse of it is demanded intensively. In this report some new information on the recycled aggregates and the recycled aggregate concretes in the field of building is introduced, and the results of consideration on the problems from the technical, institutional and economical aspects in the ready-mixed concrete using the recycled aggregates are mentioned.View full abstractDownload PDF (1217K) -
Residential Building of St. Lucus International HospitalT. Mizoguchi, A. Tomita, A. Konishi, K. Okamoto1995 Volume 33 Issue 2 Pages 29-37
Published: February 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe high-rised buildings of the St. Lucus International Hospital were built a 51 storied official building with steel structure and a 38 storied residential building with steel composite structure to combine each other the basement and the first floor. As this large-scale work was driving force for rationalized execution, the valuable methods were considered to overcome these severe constructed conditions at plan of execution. Though the slabs of this residential building were adopted unbonded prestressed floor slabs to have a large span for comfortable space in design, the new deviced thin prestressing precast floor slab forms shaped contrary T were used for rational construction. In the results, the works have been done safely to reduce the form supports and labours. As the ceiling was flat to keep high story height, a comfortable room space could be built to have high rigid floor slabs. This report was described the outline of this works execution and the characteristics and excution results of this floor works method which used a new deviced thin precast prestressing floor slab forms shaped contrary T.View full abstractDownload PDF (1984K) -
T. Itohiya, G. Tokunaga, T. Saitoh, T. Nishimura1995 Volume 33 Issue 2 Pages 38-46
Published: February 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe Akashi Kaikyo Bridge, now under construction to be completed in 1998, is a 3-span 2-hinge stiffened truss suspension bridge with a center span of 1990 m. The two anchorages (1 A, 4 A) to which the cable is fixed, were placed with the super workable concrete. Approximately 140 000 m3 of the super workable Concrete had been placed in 1 A, and approximately 240 000 m3 in 4 A. Since a testing method for the fresh property of the super workable concrete is not standardized, we conducted strict quality control adopting our original testing method. Of 1 A and 4 A, this report describes executing and quality control of the super workable concrete placed in 1 A.View full abstractDownload PDF (1669K) -
Y. Matsuda, K. Hayashi, H. Taniguchi, S. Ushijima1995 Volume 33 Issue 2 Pages 47-53
Published: February 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSChamagawa Bridge which is being constructing at Awaji in Hyogo Prefecture, is a concrete arch bridge designed in consideration of urban aesthetic district. Though the arch rib and crown of this bridge had three-boxes type sections and were set closely re-bars in, we needed not to divide one placing block into some parts but use full face placing of concrete method because the construction period of this bridge was limited. Therefore, we used Super Workable Concrete which had high fluidity and moderate stability and could be placed easily without vibration. There, however, were many restrictions on the decision of materials and mix design for Super Workable Concrete, such as the standard of materials, specified concrete strength and mixing efficiency of tilting mixer etc. The materials of concrete were only used portland blast-furnace slag cement and air entraining and high-range water reducing agent, the water cement ratio (W/C) was 37 % and cement content per unit volume of concrete (C) was 461 kg/m3. We practiced many experiments in laboratory, concrete mixing plant and construction sitebefore practical execution. In particular, we elaborately investigated about concreting methods, such as the influence of conveying distance and pumping rate, compactability of Super Workable Concrete using clear resinous models imitated arch rib, the relation between lateral pressure against formwork and rate or interval of placement, and the surface finishing effect of water permeable sheet. We carried out placing about 1 500 m3 of Super Work-able Concrete for four months.View full abstractDownload PDF (1636K) -
[in Japanese]1995 Volume 33 Issue 2 Pages 66-72
Published: February 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (951K)
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