上承式钢管混凝土桁架拱承载能力鉴定

Identification of the Bearing Capacity of the Top-bearing Concrete-filled Steel Tube Truss Arch

湖北恩施朝阳大桥为上承式钢管混凝土桁架拱桥。文中对该桥进行荷载试验检测,试验结果表明,其实测拱肋应力校验系数为0.79~0.96,钢管拱肋位移校验系数为0.75~0.88,桥面板应力校验系数为0.75~0.83,桥面挠度校验系数为0.87,残余应变和变形小于20%,其结构承载力满足设计要求。

The load test shows that the measured arch rib stress check coefficient is 0.79~0.96,the arch rib displacement check coefficient is 0.75~0.88,the bridge panel stress check coefficient is 0.75~0.83,the bridge floor deflection check coefficient is 0.87,and the residual strain and deformation are<20%.Structural bearing capacity meets the design requirements.