A seismic strengthening method for seismically vulnerable existing wooden houses using corrugated steel cladding plates covering the mortar exterior finish was proposed and the performance was evaluated in experiments and numerical simulations. The primary failure mode of strengthened shear walls in the experiments was yielding of the screws. Simulation models of the walls were created using inelastic shear springs for the screw connections. The behavior of the strengthened frames under static lateral forces were simulated. It was found that the spandrel walls contribute to the lateral strength significantly and the method improves the strength of both walls and connections between the wooden members.
