无粘结预应力钢绞线，特别是无粘结预应力钢丝束，在使用夹片锚做张拉锚具时，常发现中心钢丝（以下简称芯丝）滑丝，这不仅使芯丝受力低于周边钢丝（以下简称边丝），增加钢丝间受力不均匀程度和边丝的松弛损失，而且降低了预应力力值，从而降低了结构的抗裂性。针对这个... Unbonded prestressed steel strands, especially non-bonded prestressed steel strands, are often found in the use of clip anchors as tensile anchors. The central steel wires (hereinafter referred to as core filaments) are slippery, which not only affects the core filaments. The force is lower than the surrounding steel wire (hereinafter referred to as the side wire), which increases the unevenness of the stress between the steel wires and the slack loss of the side wire, and reduces the prestressing force value, thereby reducing the crack resistance of the structure. For this...