在建筑工程中,采用后张法曲线(或折线)孔道配置预应力筋的静定和超静定结构日益增多。对于形状复杂、控制应力高、曲度大的后张法预应力结构,其孔道摩擦造成的预应力损失一般较大。为了更准确地确定设计所需要的预应力值,就应该按照材料和施工的实际情况确定μ(孔道壁与预应力筋间的摩擦系数)和K(反映钢筋沿孔道的长度走动影响的接触摩擦系数)值。在一些重 In the construction project, the statically determinate and statically indeterminate structures of the prestressed tendons are arranged more and more with the post-tensioned curve (or broken line). For post-tensioned prestressed structures with complex shapes, high stress, and large curvature, the loss of prestress caused by channel friction is generally large. In order to more accurately determine the required prestress value for the design, the μ (the friction coefficient between the cell wall and the prestressed tendons) and K (the friction coefficient that reflects the influence of the walking along the length of the channel) should be determined according to the actual conditions of the materials and construction. Coefficient) value. In some weight