4.1.3 高强度螺栓的防锈日本桥梁、建筑用的高强度螺栓,一般都是热处理后不加任何处理就使用。为了降低扭矩系数和减小其离散,除施加润滑处理外,不再进行特别的表面处理。铁塔等结构以往使用镀锌螺栓,但对强度很高的摩擦式连接用的高强度螺栓,由于酸洗处理中产生的氢,对滞后 4.1.3 rust-proof high-strength bolts Japanese bridges, high-strength bolts used in construction, are generally used without any treatment after heat treatment. In order to reduce the torque factor and reduce its dispersion, no special surface treatment is required except for the application of lubrication. In the past, galvanized bolts were used in the structures such as the tower. However, for the high-strength high-strength bolts for frictional connection, the hysteresis