Analytical study on the web imperfection design of a shear panel damper for mechanical performance control

摘要

In the design of joints and peripheral members of shear panel dampers, the sectional design corresponding to the increase in the strength of the shear panel is required. Therefore, if a shear panel damper with a small increase in proof stress can be achieved, a reasonable design of the joint and peripheral member can be done. In this study, the feasibility of the load–displacement relationship control of the shear panel was analytically examined by adjusting the web imperfection shape. First, a method for searching a web imperfection shape to reproduce a target load–displacement relationship was proposed. In this method, the web imperfection shape was expressed as convolution of some mode shapes. Subsequently, each mode coefficient was changed using the modal iterative error correction method to fit the target load–displacement relationship. Then, the method searches for a web imperfection shape using example problems. The results indicate that the web imperfection shape that matched the target load–displacement relationship could be searched by the proposed method. In addition, the sensitivity to the variation in the amount of web imperfection was also examined. It was confirmed that the load–displacement relationship of the shear panel damper can be controlled by the web imperfection shape. However, the present examination is limited to the analytical examination, and the feasibility of the production of the actual member has not been examined. A future study should verify if the actual member of the shear panel damper with web imperfection shape, searched by the proposed method, shows the target load–displacement relationship. A method for searching a web imperfection shape to reproduce a target load displacement relationship was proposed. And then,it is confirmed that the web imperfection shape that matched the target load displacement relationship could be searched by the proposed method.