Title:
WOODEN STRUCTURE LOAD-BEARING WALL, CONSTRUCTION METHOD FOR WOODEN STRUCTURE LOAD-BEARING WALL, METHOD FOR INCREASING WALL MAGNIFICATION OF WOODEN STRUCTURE LOAD-BEARING WALL, AND GYPSUM-BASED LOAD-BEARING SURFACE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2023/058470
Kind Code:
A1
Abstract:
The present invention increases the wall magnification of a wooden structure load-bearing wall without additionally attaching a reinforcing material or stiffener, and without increasing the specific gravity and/or sheet thickness of a gypsum-based surface material. A gypsum-based load-bearing surface material 10 is formed from: a main material or a core material comprising a plate-like gypsum cured body which exhibits a nail-side surface resistance of 500 N or greater and which has blended therein inorganic fibers and an organic-based stiffness-improving material; and a paper member that covers at least front and back surfaces of the main material or core material. This load-bearing surface material: has a surface density that falls within a range of 6.5-8.9 kg/m2 and a compressive stiffness of 6.5 N/mm2 or greater; exhibits, in an in-plane shearing test of the load-bearing wall, an ultimate displacement (δu) greater than 20×10-3 rad and an initial stiffness (K) of 2.0 kN/10-3 rad or greater; and raises not only the ultimate displacement but also a plasticity rate (μ) due to a reduction in yield point displacement (δv). As a result, the wall magnification and short-term standard shear stiffness (P0) of the wooden structure load-bearing wall are effectively and efficiently increased.
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Inventors:
SUDO USHIO (JP)
NIIMI KATSUMI (JP)
HASEGAWA TOMOYA (JP)
YAMASHITA TAKUJI (JP)
AKAI KOZO (JP)
SATO YOUSUKE (JP)
NIIMI KATSUMI (JP)
HASEGAWA TOMOYA (JP)
YAMASHITA TAKUJI (JP)
AKAI KOZO (JP)
SATO YOUSUKE (JP)
Application Number:
PCT/JP2022/035489
Publication Date:
April 13, 2023
Filing Date:
September 22, 2022
Export Citation:
Assignee:
YOSHINO GYPSUM CO (JP)
International Classes:
B32B13/08; E04B2/56; E04C2/04; E04C2/26
Domestic Patent References:
| WO2021205993A1 | 2021-10-14 | |||
| WO2019203148A1 | 2019-10-24 | |||
| WO2019058936A1 | 2019-03-28 |
Foreign References:
| JP2002070239A | 2002-03-08 | |||
| JP2021080142A | 2021-05-27 | |||
| JPH09217476A | 1997-08-19 | |||
| JPH09302802A | 1997-11-25 | |||
| JP6412431B2 | 2018-10-24 | |||
| JP5642948B2 | 2014-12-17 | |||
| JP2021014227W | 2021-04-01 | |||
| JP6412431B2 | 2018-10-24 | |||
| JP2021163783A | 2021-10-11 |
Other References:
"Notification No. 1100", 1 June 1981, MINISTRY OF CONSTRUCTION
"Notification No. 1541", 15 October 2001, MINISTRY OF LAND, INFRASTRUCTURE, TRANSPORT AND TOURISM
"Allowable Stress Design for Wooden Framework Construction Method Housing", pages: 63,300
"Notification No. 1541", 15 October 2001, MINISTRY OF LAND, INFRASTRUCTURE, TRANSPORT AND TOURISM
"Allowable Stress Design for Wooden Framework Construction Method Housing", pages: 63,300
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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