钻孔法检测残余预应力的有限元计算

Finite Element Calculation for Drilling Hole Method to Solve Residual Prestress

用有限元法计算平板构件和预应力混凝土梁在钻孔前后的应力应变分布。结果表明,钻孔法检测预应力混凝土梁的残余预应力时,应变片的位置选择很重要;建议合理的贴片位置,并给出检测残余预应力时的修正系数。这一研究成果是钻孔法检测预应力混凝土梁残余预应力的基础,可以为该方法的工程应用提供参考。

The distribution of stress and strain before and after the hole is drilled was calculated by FEM. The FEM calculation results show that the location chosen was important, and give advice about the location of the strain foil and the coefficient of correction for testing prestressed concrete beam＇s residual prestress. The results of this research are the basis of testing prestressed concrete beam＇s residual prestress, which offer some reference for the application in engineering.