预应力混凝土管桩现存应力测试方法研究

Measurement of existing stress in prestressed concrete piles

利用应力释放的力学原理,开展预应力混凝土管桩现存应力测试方法研究,通过数模分析得到不同钻孔深度和孔径对应力释放程度的关系曲线,给出在不损伤内部主筋情况下根据结构特点选取合理钻孔深度和孔径的方法,并通过相应的现场试验进行验证。

This paper studies the existing prestressed concrete pipe＇s stress measurement method using the mechanical stress release principle,and obtains relationship curves between drilling depth diameter and different stress release levels by mathematical modeling.Furthermore,it presents the method for choosing reasonable drilling depth and diameter according to the structural characteristics and without injuring the internal main reinforcement,which is verified by corresponding site experiments.