Reinforcement method of composite seismic resistant wall by structural plywood and steel members

This is a study of a composite structural wall of wood and steel, in which two steel columns are sandwiched between two plywoods with a thickness of 12 mm. Previous studies have shown that plywood undergoes out-of-plane deformation that interferes with the usability of the building. Therefore, a horizontal loading test was conducted with the position of the bolt that fastens the plywood as a parameter, and out-of-plane deformation and destructive properties were examined. Furthermore, in order to suppress out-of-plane deformation of plywood, we proposed a new reinforcement method using a steel member with a thickness of 3.2 mm. Also, its effect was verified experimentally. As a result of experiments with four types of bolt layouts, the specimen with bolt layout close to center presented small out-of-plane deformation, and each bolt layout effected the mechanical properties each other. The out-of-plane reinforcement was effective for bolt layouts that were long in the horizontal direction.