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计算预应力混凝土管桩轴心受压承载力时,应考虑预应力钢筋产生的混凝土残留预压应力影响,根据混凝土受压时应力-应变的关系式及混凝土有效预压应力与管桩配筋率的函数关系,推导出管桩达到受压极限时混凝土残留预压应力与混凝土初始预压应力的关系,并给出了预应力混凝土管桩轴心受压承载力的计算式。
When calculating the axial compressive bearing capacity of prestressed concrete pipe piles, the influence of prestressing residual stress of prestressed concrete should be considered. According to the relationship between stress-strain of concrete and the prestressing stress of concrete and the reinforcement of pipe pile The relation between the prestressing stress of concrete and the initial prestressing stress of concrete pipe when the pipe pile reaches the limit of compression is deduced. The formulas for calculating the axial compressive bearing capacity of prestressed concrete pipe piles are also given.