基于滑移理论的大跨径钢管混凝土拱桥稳定性分析  

Stability Analysis on Large Span Concrete-Filled Steel Tube Arch Bridge Based on Slip Theory

作　　者：曾德荣[1] 李杰[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2010年第3期344-347,492,共5页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：钢管混凝土结构在桥梁及建筑工程中得到广泛应用,而钢管和混凝土之间的黏结滑移性不仅对钢管混凝土结构承载力有影响,而且对其稳定性也有较大影响。在研究了钢管与混凝土的黏结理论的基础上,建立了钢管与混凝土之间黏结的本构关系,利用现有结构分析程序采用黏结滑移单元实现了这种本构关系下的模拟和分析,通过示例说明了钢管与混凝土的黏结程度对钢管混凝土拱桥的整体屈曲荷载和安全稳定性系数的影响,研究结果表明如果以黏结紧密且无相对滑移为设计依据,所得出的拱桥的稳定性结果偏于不安全。The concrete-filled steel tube structure obtains the widespread application in the bridge and the architecture engineering,the bonding force between the concrete and steel tube influences both the bearing capacity and stability of the structure.The study of stability of the structure is based on the bond-slip theory between the concrete and steel pipe,the construction relations are established,and the bond-slip unit is realized by using existing structure analysis FEM software.The influence of bonding degree between concrete and steel tube on the bulking loading and safety stability coefficients of the concrete-filled steel tube arch bridge is studied by a case study.The findings indicate that the stability of arch bridge is inclined to no safety,if the bridge is based on the design with close bonding and no relative slip.

关 键 词：钢管混凝土 力学性能 黏结滑移 稳定性 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]