FORMULAE TO EVALUATE STRUCTURAL PERFORMANCE OF SHEATHED WALLS WITH UNCOVERED POSTS IN CONVENTIONAL POST AND BEAM STRUCTURES:-Evaluation of walls with upper and/or lower slits or openings consisting of several sheets-

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Generally in Japanese style rooms, sheathed walls with uncovered post have widely been used instead of mud walls. The sheathing material is nailed and inserted in the frame with noggins. The formula to calculate the elastic strength, yield point, ultimate strength and the ductility factor has been derived for the sheathed wall, considering the elements of the shear resistance of the nail strucked in the noggins and frame, and the diagonal compression resistance of the sheathing material as truss action. In order to verify the formula, the shear racking tests of sheathed walls have been carried out where plywood and plasterboard have been used as sheathing materials. It is clear that the formula is sufficiently accurate to predict the elastic and plastic behavior of sheathed walls with uncovered post for structural calculation.
日本建築学会の論文