耐震補強格子壁の格子材配置の最適化

Abstract

Construction method to install earthquake resistant latticed wall in the existing building frames is effective, from the viewpoint of business continuity during construction, and from the viewpoint of transparency after completion. Furthermore, to reduce vibrations and noise during construction, it is desirable that welding or anchor bolt joining is not required between latticed wall and the existing building frames, and various methods have been used. However, the current methods of retrofitting have uniform shapes of the brace, so the seismic performance and permeability are not efficient enough. In this study, a shape optimization approach is presented for improving mechanical property. The existing beams, columns, and the members in latticed wall are modeled using beam elements, and the contact between latticed wall and the existing building frames are evaluated using the penalty approach. It is shown that various shapes can be generated by solving nonlinear programming problems considering structural weight of latticed wall and horizontal stiffness of the frame.