受压区开裂对预应力混凝土连续梁承载能力影响研究

The Research of influence of Cracks in compression zone on Capacity of Pre-stressed Concrete Continuous Box-girder

针对某梁在施工过程中在墩顶箱梁底板受压区发现有较大的裂缝等缺陷,采用静力荷载试验的方法分析缺陷对桥梁承载能力的影响。荷载试验结果表明,开裂区域混凝土已经部分退出工作,裂缝所在截面抗弯承载能力已经明显削弱。

Because larger cracks and other defects in the compression zone of the top of pier girder floor at a beam were found in the construction process,the static load test method was applied to analyze the influence of defects on the bridge bearing capacity. The load test results show that the crack area of concrete has been partially out of work,and the flexural bearing capacity of crack section has been significantly weakened.