DEVELOPMENT AND APPLICATION OF NEW SEISMIC STRENGTHENING SHEAR WALL WITH HIGH COST PERFORMANCE FOR CONVENTIONAL WOODEN STRUCTURE

Two new low-cost shear walls have been developed, to effectively strengthen a conventional wooden structure without any change in the foundation of the house. The sheathed shear wall with a 330 mm height wooden beam does not require RC beam foundation. The brace shear wall has “all-threaded steel” bars and so-called “hole-down joint metal”. Furthermore, a 46-year old wooden house was retrofitted using the two newly developed walls as well as other conventional strengthening’s. It was confirmed that after strengthening, all indices are greater than 1.00 and the natural period becomes shorter.