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Takanashi S.,Japanese National Institute for Occupational Safety and Health | Ohdo K.,Japanese National Institute for Occupational Safety and Health | Takahashi H.,Japanese National Institute for Occupational Safety and Health | Sakamaki Y.,Houseplus Corporation | And 3 more authors.
Journal of Structural and Construction Engineering

The purpose of this study is to clarify the relationship between the damage of exterior walls and the residual strength of a wooden house after earthquakes. The two kinds of exterior wall were selected in the experiments, one was consist of a siding and another was made by a mortar. In the siding exterior wall, the nails fixing the siding board come out of after loading. In the mortar exterior wall, the width of the crack around the window expanded with loading. As a result, the residual strength of the house after earthquakes could be presumed from the damage of the exterior wall. © 2015, Architectural Institute of Japan. All rights reserved. Source

Sakamaki Y.,Houseplus Corporation | Michiba N.,Houseplus Corporation | Uesugi Y.,Houseplus Corporation | Ohashi Y.,Tokyo City University
Journal of Structural and Construction Engineering

A new type of moment resisting timber joint has been developed. The joint is made up of steel plates, bolts and cotters. The plates and the bolts are embedded with timber element of frame structure. By combining those elements with steel cotters, moment resisting joints can be constructed easily. Static loading tests of the joint have been performed, and results of the tests made it clear that the joint have rotational rigidity and strength required from constructing moment resisting joint. In this report, three kinds of racking tests were performed to simulate the moment-rotational angle. "A tests" were prototypes, and "B tests" and "C tests" had each kinds of joint. The simulation results of moment-rotational angle curves by three kinds of tests agree with the prototype tests results. Source

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