后张预应力混凝土连续梁孔道摩阻试验研究与实例分析

Research and Case Analysis on Experiment of Post-tensioning Prestressed Concrete Continuous Beam Pipe Frictional Resistance

鉴于对后张梁孔道摩阻测试的必要性,文章介绍了后张梁孔道摩阻系数的试验原理和试验方法,通过采用线性回归原理,由规范中给出的公式推导预应力孔道摩组系数的计算公式,结合向莆铁路沙溪特大桥现场测试数据进行分析处理,计算出实际预应力孔道摩阻系数的值,并与设计值进行对比分析,对其影响因素作出总结。

In view of the necessity of post-tensioning beam pipe friction test,this paper describes the principles of post-tensioning beam pipe friction testing and test method,by using the principle of linear regression,and using standard formula to put out the calculative formula of prestressed pipeline hindering.In combination with the local test data of Xiangpu Railway Shaxi super major bridge,calculates the value of practical prestressed pipeline hindering modulus,compares with design value,and makes summaries on the affecting factors,which may provide reference for bridge engineering technicians.