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Ikeda S.,Waseda University | Hasemi Y.,Waseda University | Yasui N.,Waseda University | Nagamori H.,Waseda University | And 7 more authors.
World Conference on Timber Engineering 2012, WCTE 2012 | Year: 2012

An External wall, inner side of external wall, and partition wall, which retain both seismic and fire- resistive performance even after the severe earthquake occurred, was technically developed in this paper. The development was succeeded by conducting both horizontal loading test and fire loading test on each designed specimen.

Noaki M.,Tokyo University of Science | Ohmiya Y.,Tokyo University of Science | Makino J.,Tokyo University of Science | Yasui N.,Waseda University | And 2 more authors.
Bulletin of Japan Association for Fire Science and Engineering | Year: 2012

Fire resistant tests are conducted on full scale specimens of wooden wall that sets up wooden-based board on heating side were carried out. The furnace at Tokyo University of Science was used. As the result of experiments, the temperature of each part of the wall was not able to confirm a remarkable difference by the wood species and installation method. But increase in board thickness and fire retardant treatment brings the delay of the temperature rise. The temperature rise of unexposed surface of wooden-based board became rapid after it reached 260 °C. The time which temperature of exposed surface of plywood reached 260 °C was 1∼4 minutes later than the time which temperature of unexposed surface of wooden-based board reached 260 °C.

Ohashi H.,Takenaka Corporation | Nagomori H.,Takenaka Corporation | Yamamoto M.,Center for Better Living | Yusa S.,Tokyo University of Science | And 6 more authors.
AIJ Journal of Technology and Design | Year: 2015

Fire-resisting wood structural elements for building were developed. It is composed of three layers made of glued laminated timber, "a load-bearing part, a self-charring-stop and a surface layer". Tree species of load-bearing part is limited to the only kind. In order to enable a species different, this research was carried out. Fire resistance test was performed to demonstrate the effect on fire resistance of the wood density. The relationship of fire resistance and wood density of the load-bearing part was clear. Usage of high wood density of the load-bearing part was obtained a conclusion that is advantageous to fire performance.

Murakami M.,University of Tokyo | Fukuyama H.,University of Tokyo | Kitamura H.,Mitsuwa Co. | Harada K.,Wood Structure Prom. INC. | And 3 more authors.
AIJ Journal of Technology and Design | Year: 2015

In order to maintain a large space for buildings constructed by Post-and- Beam, a large section is required. If sawed up logs or laminated wood which distribute as construction materials for housing can be used, it will be a large contribution to promote the construction of public buildings using local wood as well as stabilizing the management of lumber industry and forestry. This is a report of a full-size bending test and other tests of physical properties in order to estimate the efficiency of plywood box beams with tensile joint of flange based on Post-and- Beam Construction.

Kikitsu H.,Japan National Institute for Land and Infrastructure Management | Yoshida A.,Tokyo Polytechnic University | Maeda Y.,General Building Research Corporation | Nishimura H.,General Building Research Corporation | Okada H.,Japan Housing and Wood Technology Center
AIJ Journal of Technology and Design | Year: 2012

The methods of structural test and evaluation applicable to steel wall system were developed in order to verify wind-resistant performance of the system. They were incorporated in the Standard of Steel Wall (SSW2011). The authors developed the methods in the viewpoint of performance-based structural design so that the concept of structural verification using them follows Building Standard Law of Japan. This paper outlines the detail of the proposed methods along with technical backgrounds.

Loading Japan Housing and Wood Technology Center collaborators
Loading Japan Housing and Wood Technology Center collaborators