典型简支梁桥纵向阻挡型防落梁装置作用机理研究

Research of Longitudinal Block Restrainers’ Mechanism for Simply Supported Girder Bridges

针对我国公路桥梁中典型的板式橡胶支座简支梁桥地震响应特点,就目前普遍采用的纵向阻挡型防落梁装置的作用机理及其适用范围进行研究分析,并在阻挡型防落梁装置限位效果不佳的情况下,提出采用连梁装置与阻挡型限位装置协同工作的新型组合型纵向防落梁装置,同时对这种组合型限位装置的作用机理进行介绍。

Based on the response characteristics of the girder bridges simply supported on laminated rubber bearing under the earthquake, the unseating prevention effect of blocked restrainers and the scope of its application were analyzed. According to the existing problems of restraining devices in some case, a reasonable restrainer design process combine the blocked restrainers and the connecting device for simply supported bridges is proposed. And the mechanism of this assembled restrainer is introduced exhaustively.