A STUDY ON SHEARING BEHAVOIR OF BEARING WALLS BY WOODEN PANELS CONSTRUCTION

摘要

This paper presents results of a study of the shearing behavior of bearing walls of a wooden panel construction. The wooden panel construction is of a structure consisting of a wooden frame and plywood panels joined face-to-face with adhesives. We conducted shearing experiments on life-size single bearing wall wooden panels and double such panels arranged vertically as joined units to study their shearing behaviors and compare their results with those calculated by the finite element method. We also conducted tests and analyses to investigate whether the Sugiyama Sheathing Area Ratio Method, an evaluation method of shear strength and shear rigidity of wooden panel walls, can be applied for the strength evaluation of bearing wall wooden panels. A total of 16 different bearing wall wooden panels with the width of 7,280 mm and the height of 5,561 mm having openings of different sizes were subjected to the experiments. The test panels were subjected to static, cyclic and no vertical loading, which was controlled by deformation angles. The loading onto the double panels was assured so that the same force was applied to both lower and upper panels. From these experiments and subsequent analyses, we presents the following.We confirmed that the single panels and the lower of the double panels did not show any significant difference in shearing behavior but the upper of the double panels showed less rigidity than the lower panels. We confirmed the test results obtained were roughly identical in terms of deformation behavior, reaction force and shear stress distribution with those obtained by the finite element method. We verified that the Sugiyama's Sheathing Area Ratio Method can be used for rigidity evaluation of single panels and the lower of double panels, both having openings. However, we realized that the factors relating to the joining of the lower and upper panels need to be taken into account when applying the method to the evaluation of the upper of double panels.