独柱支承梁式桥横向抗倾覆构造措施研究  

Study of Transverse Anti-Overturning Measures for Single-Column-Supported Beam Bridge

作　　者：栗勇[1] 刘一平[1] 

机构地区：[1]北京市市政工程设计研究总院,北京100082

出　　处：《世界桥梁》2014年第1期50-54,共5页World Bridges

摘　　要：为防范独柱支承梁式桥倾覆事故的发生,对现有能对桥梁倾覆发挥作用的抗倾覆构造措施(A型、B型、C型抗震构造措施,板式橡胶拉压支座,球面拉压支座)进行研究。通过抗倾覆构造措施优劣分析及横向抗倾覆安全系数对比可知,A型、C型抗震构造措施更适合用于提高桥梁结构横向倾覆稳定性;C型抗震构造措施对提高结构倾覆稳定性效果更加显著,即边墩设置抗倾覆构造措施相对于中墩更能提高结构横向倾覆稳定性。针对设置C型现有抗倾覆构造措施所带来的支座易损坏的不足,提出了预拉力型抗倾覆构造措施,并增设具有警示功能的预警系统。To prevent the overturning events from happening to the single-column-supported beam bridges, the anti-overturning measures which are effective to combat the bridge overturning were studied, including the anti-seismic structure measures of A, B and C types, the laminated rubber bearings, and spherical bearings. The analysis of advantages and drawbacks of the anti-o- verturning structure measures and the comparison of the transverse anti-overturning safety coeffi- cients demonstrate that the anti-seismic structures of A and C types are more effective in improving the transverse anti-overturning stability of the bridge structure, and the C type anti-seismic struc- ture has more significant effect on the overturning stability, that is, in the interest of the trans- verse overturning stability, the anti-overturning structure installed on the side piers is more superi- or to that installed on the intermediate pier. Considering the deficiency of easily-occurred bearing damages in the current C type anti-overturning structure, the anti-overturning structure with pretension is proposed, and the alarming system with warning feature is added.

关 键 词：独柱支承 梁式桥 倾覆稳定性 抗倾覆构造 桥梁支座 研究 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]