EVALUATION AND PREDICTION OF MECHANICAL PERFORMANCE OF PLYWOOD SEISMIC WALLS WITH NON-UNIFORM LATTICE PATTERNS PROCESSED BY CUTTING

Plywood, due to its high workability, has the potential to be used as a structural seismic wall with unreinforced openings, offering flexible design possibilities. In this study, we define a "Non-Uniform Lattice Patterned Plywood Seismic Wall" that features an opening pattern surrounded by straight members of various widths and angles, as an example of a free shaped, unreinforced opening. We experimentally verify its mechanical performance and propose two numerical evaluation methods: a simplified calculation technique that models the wall as a frame of beam members, and a detailed calculation method that models the wall as an orthotropic plate element. We also propose a shape generation method using optimization techniques. Finally, we outline the design flow for these seismic walls, integrating the proposed numerical methods and shape generation techniques.