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预应力损失中摩阻损失所占的比例较大,精确地计算预应力摩阻损失有利于正确计算钢束沿程有效预应力的大小,其对于施工过程张拉控制有着重要意义,更关系到成桥后的使用安全性。我国现行的计算理论未考虑由摩阻损失造成的正压力沿程减小的问题。对于复杂空间预应力钢束,工程中常用的计算方法存在明显缺陷。通过对钢绞线空间曲线的拟合,同时考虑钢束拉力沿程的非均匀分布计算摩阻损失的方法,能得到更精确的结果。
The proportion of friction loss in prestress loss is relatively large. Accurately calculating the prestress friction loss is helpful for the correct calculation of the effective prestressing force along the steel beam, which is of great significance to the control of the tension during the construction process. After the bridge into the use of security. The current calculation theory in our country does not consider the problem of the decrease of the positive pressure caused by friction loss. For complex space prestressed steel beams, there are obvious defects in the commonly used calculation methods in engineering. Through the fitting of the space curve of the steel strand and considering the non-uniform distribution along the tension of the steel beam, the method to calculate the friction loss can obtain more accurate results.