木造軸組工法における水平構面の面内せん断性状に関する研究 : その3 火打ち水平構面の面内せん断試験

概要

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This study reports the result of a sheathed diaphragm with angle ties test where the angle ties were installed in the corner of a floor-beam structure in wooden post and beam construction. The test specimens were prepared according to Table of Floor Strength Factors in the Quality Assurance Law. In-plane shear test was conducted on a total of 9 specimens; 3 different load areas per angle tie with 3 different types of beam heights. Failure mechanisms showed that all specimens corner bracings were buckled as final load was applied in the direction of compressive force on angle ties. Floor strength factors were calculated based on load-displacement curve and in most specimens they were determined by the strength at 1/120 rad. And it was confirmed that these values are identical with the Floor Strength Factors in the Quality Assurance Law. It was observed that bending deformation on the weak axis of beams with angle ties were greater than the deformation angle in the corner part due to the corner angle tie end joint. By comparing axial force based on the measurement result from strain of angle tie and calculated values based on the frame model, they were found to be identical. The observed axial force applied to the angle brace have been compared with calculated values and a ratio of the deformation angle to the entire deformation was examined.
一般社団法人日本建築学会の論文
2009-03-27