摘要
为了提高桥梁结构在竖向地震作用下的抗震能力,提出竖向隔震的思想,首先分析了桥梁竖向隔震的减震原理,提出一种新型的三维隔震装置并确定了其几何结构和力学性能参数其次,利用有限元软件AN-SYS建立了一座三跨连续板桥三维模型,分析了在El-centro波竖向分量9度小震作用下装置的竖向隔震效果,并研究了竖向粘滞阻尼器的阻尼系数对竖向隔震效果的影响规律结果表明,提出的三向隔震装置可以有效地减小结构的竖向地震动力响应,竖向隔震效果随粘滞阻尼系数的增大而增加,但阻尼系数存在一个较优值.
The method of vertical isolation is proposed to improve the capability of structural seismic resistance. Principle of vertical seismic reduction is analyzed firstly and a new three-dimensional isolator is proposed in this paper, with its geometry configuration and mechanics parameters confirmed. Based on this,Then the effect of isolation on a continuous slab bridge under vertical component of El-centro earthquake wave and research on the influence of vertical damping to vertical isolation effect are performed. The results show that the new three-dimensional seismic isolator is effective in reduing the vertical dynamic response of continuous slab bridges. With the increase of damping coefficient, the vertical seismic isolation effect will increase, but the damping coefficient has an appropriate value.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2006年第4期463-466,共4页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50278029)
关键词
桥梁
竖向地震响应
竖向隔震
隔震支座
粘滞阻尼器
bridge
vertical seismic responses
vertical isolation
three-directional seismic isolator
viscous damper
