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Predecessor
Volume 17, Issue 10
Displaying 1-7 of 7 articles from this issue
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Hisanobu Ichimasu1979 Volume 17 Issue 10 Pages 1-8
Published: October 15, 1979
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThis paper describes the properties of “Regulated Set Cement”and“Regulated Set Cement Concrete”for repair works, also showing two examples of urgent repairing work by the use of“Regulated Set Cement”.
The first example of work is designed to repair the expansion joint of road bridges, and the second is to repair median zone of express-ways using continuous mixers.View full abstractDownload PDF (2026K) -
Hiroshi Imai, Minoru Kondo, Masayoshi Yokoyama1979 Volume 17 Issue 10 Pages 9-22
Published: October 15, 1979
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe building of Izumi High School of Miyagi Prefecture was heavily damaged by the Miyagi-oki Earthquake of June 1978. Among those buildings which were built according to the present construction standard provided by the Architectural Institute of Japan, this school was the first one that was so heavily damaged in Japan. It was decided to repair the damaged concrete members for using the building again as an aseismatic structure.
This paper reports the method of repairing the damaged building and the design for aseismatic strengthening. The cause of such damage was examined in terms of horizontal strength as well as the ratio of sharing the force of earthquake. By analyzing the horizontal strength of the building after repaired and strengthened, it was confirmed that the resistance to earthquake was increased.View full abstractDownload PDF (2906K) -
Kazumasa Kosugi, Hiroshi Imai, Masayoshi Yokoyama1979 Volume 17 Issue 10 Pages 23-29
Published: October 15, 1979
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThis paper describes the repairing works for the buildings of Izumi High School which were damaged by the Miyagi-oki Earthquake. To support temporarily the load of the upper stories which had been sustained by the columns to be dismantled, concrete was newly placed until a sufficient strength could be obtained. The supporters were previously arranged on each floor, and the old concrete of the ground floor was partly chipped to make a new and strong concrete foundation temporarily, on which hydraulic jacks were equipped. These supporters were first jacked up, and the load of the upper stories could be transmitted by jacking up successfully.View full abstractDownload PDF (1492K) -
Shigenobu Shibuya, Shigeo Sato1979 Volume 17 Issue 10 Pages 30-38
Published: October 15, 1979
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe foundation of the large vibration stand installed at the Tadotsu Engineering Laboratory, is a huge reinforced concrete structure. The foundation must be designed in such way that the vibration stand may produce efficient vibration waves as intended, and that the environment may not be affected by vibration. As it should be an integrated structure in that manner, previous investigation was performed and the way of construction was established for assuring the integrality for practical construction.
This summer was hot and 3°C higher than usual on average, but a countermeasure for temperature stress was synthetically incorporated in the structure, so that the quality of concrete could be ensured in hot season.
This describes the integrated operation of mass-concrete foundation as well as the control of temperature measurement.View full abstractDownload PDF (1973K) -
Toshifumi Koreishi, Hideaki Sugita1979 Volume 17 Issue 10 Pages 39-44
Published: October 15, 1979
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSFor repairing the inverted concrete in the existing pressure tunnel of a hydraulic power station, steel fibre concrete was applied for reinforcement. The concrete was mixed at the ratio of 1% (80kg/m3) of steel fibre, 380kg/m3 of C, 50.0% of W/C, 56% of s/a and 12±2cm of slump, respectively. For mixing, a tilting mixer of 1m3 concrete was used. The steel fibre was mixed by manual power. As a result of abrasion test with a flowing tester, the abrasion-resistance was improved by twofold. For quality control examination, the slump and air-content were measured, and a vibration consistency meter test, washing test and X-ray test were carried out. It was confirmed that the quality control method for ordinary concrete could be applied efficiently and that the steel fibre was evenly distributed.View full abstractDownload PDF (1166K) -
[in Japanese]1979 Volume 17 Issue 10 Pages 67-72
Published: October 15, 1979
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (862K) -
[in Japanese]1979 Volume 17 Issue 10 Pages 95-105
Published: October 15, 1979
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (1134K)
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