钢结构 结构螺栓 确定接触面涂层导致预紧力损失的试验方法

[中文适用范围]： 本文档规定了在结构钢构件中使用的高强度螺栓的试验方法，用于确定由于螺栓接头摩擦面上存在涂层（涂层足够厚，在短期内影响螺栓中的预应力，或在持续载荷下随时间显示出显著变形（蠕变倾向材料））而导致的预应力损失。螺栓握裹范围内的其他材料（刚度远小于钢，如绝缘材料）不包含在本试验方法中。 [外文原描述]： This document specifies test methods to determine loss of pretension in high-strength bolts due to the presence of coatings on the faying surface(s) of a bolted joint to be used in structural steelwork, when any of the coatings are thick enough to affect the pretension in a bolt in the short term, or can show significant deformation over time under sustained loads (creep-prone materials). The presence within the grip of the bolt of other materials having considerably smaller stiffness than steel, such as insulation, is not included in this test method.