Design for redundancy maximization of steel bridges based on nonlinear multiscale analysis

点击翻译按钮获取中文摘要

In order to ensure the redundancy of steel truss bridges, the performance required for joints is examined in the cases of intact and damaged conditions of a target bridge. As a result, it can be concluded that, for the improvement of the redundancy of the intact bridge, not only the axial force of the diagonal member but also the effect of the floor beams on the gusset plates should be considered. It can also be remarked that the increase of the in-plane bending capacity is effective for the improvement of the redundancy of the damaged bridge. Moreover, hybrid zooming method, which is a zooming analysis utilizes the result of the global model with refined mesh by plate elements for joints, is proposed in order to reduce the computational cost of nonlinear finite element analysis.