【摘要】 针对地震作用下公路桥梁的碰撞问题,采用接触单元法模拟桥梁之间的碰撞作用,并在此基础上研究了采用磁流变阻尼器的公路桥梁碰撞的半主动控制方法。通过对某公路桥梁的数值模拟发现,地震作用下桥梁之间的相互碰撞,将大幅增加桥梁的绝对加速度响应。采用磁流变阻尼器的半主动控制系统能够较好地降低结构的地震响应和消除地震作用下的碰撞。更多还原

【Abstract】 Aiming at the pounding problem of highway bridges under seismic excitations,this paper investigates the semi-active control of pounding suppression of highway bridges using magnetorheological dampers by modeling the colliding of the structures with contact element.Numerical simulation of a highway bridge indicates that the pounding between the adjacent segments of the bridge will significantly increase the absolute acceleration responses,and the semi-active control system with MR damper can effectively suppress the dynamic responses and the pounding of the structure.更多还原