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劲性骨架混凝土拱桥属于钢混组合结构,这种结构结合了钢框架的韧性与混凝土刚度的优点,即可适应变形延展,又可控制变形大小及漂移。施工时,首先架设钢框架,然后以钢框架为支架进行混凝土的施工,可以节省工时。虽然优点诸多,但是也存在一定缺陷。后期养护维修过程中,当前的检测设备及手段尚无法对内部缺陷及发展进行准确定位和评估。当前尚无针对性的评估规范,只能套用一般拱桥的检测评估规程,无法通过成熟手段准确评估可能的缺陷对于桥梁承载能力的影响。这些限制制约了劲性骨架混凝土拱桥的应用及发展。本研究结合表观检测及理论分析方法,由表及里对既有劲性骨架混凝土拱桥承载能力劲性评估,探讨了合理的评估方法。
The rigid skeleton concrete arch bridge belongs to the steel-concrete composite structure, which combines the advantages of the toughness of the steel frame and the rigidity of the concrete to adapt to the deformation extension and control the deformation size and drift. Construction, the first set up steel frame, and then use steel frame as a support for the construction of concrete, you can save hours. Although many advantages, but there are also some shortcomings. During the later maintenance and repair process, the current testing equipment and methods have not been able to accurately locate and evaluate internal defects and development. At present, there is no specific evaluation norms, only the general assessment of the application of the rules of the arch bridge, can not accurately assess the potential defects through the mature means of bearing capacity of the bridge. These restrictions restrict the application and development of the rigid skeleton concrete arch bridge. In this study, combined with the apparent detection and theoretical analysis methods, from the table and in the existing capacity of the rigid frame concrete arch bridge carrying capacity of the assessment of stiffness, discusses a reasonable assessment method.