关于《公路钢管混凝土拱桥设计规范》中拱肋刚度取值问题的探讨  

Discussion on Rigidity Value of Arch Rib in Design Specifications

作　　者：顾卫国 

机构地区：[1]南通市交通建设咨询监理有限公司,江苏南通226000

出　　处：《城市道桥与防洪》2016年第12期39-42,共4页Urban Roads Bridges & Flood Control

摘　　要：针对钢管混凝土拱桥设计时拱肋刚度取值方法各异的问题,即现行《公路钢管混凝土拱桥设计规范》(JTG/T D65-06-2015)采用统一理论,而《钢管混凝土拱桥技术规范》(GB50923-2013)采用叠加理论。以实桥工程为依托,采用有限元分析的方法,对钢管混凝土拱肋在不同计算理论下的内力和位移进行分析。结果表明,两种理论下钢管混凝土拱肋轴力几乎没有变化,而弯矩则有较大差异,同时拱肋位移也相差较大。对其原因进行探究,为工程实践提供参考。In view of the different rigidity value methods of arch rib in the design of concrete-filled steel tubular arch bridges, the unified theory is used in the current specifications for design of highway concrete-filled steel tube arch bridges, but the superposition theory is in technical specification for concrete filled steel tube arch bridges. Based on the real bridge project, the finite element analysis method is used to analyze the internal force and displacement of the concrete-filled steel tube concrete arch rib under the different calculation theories. The results show that there is almost no change in the axial force of the concrete filled steel tube arch rib under the two theories, but the bending moments are greatly different, and at the same time, the displacements of arch rib are different. The article discusses its reason, which provides reference for the engineering practices

关 键 词：钢管混凝土拱桥 拱肋刚度 统一理论 叠加理论 有限元分析 

分 类 号：U442.51[建筑科学—桥梁与隧道工程]