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在钢结构中,往往遇到高强度螺栓受拉力的接头。高强度螺栓中原来已受预拉力,再承受外加拉力以后,预拉力与外加拉力合成,而实际存在于螺栓中的拉力有多大?从概念上有时会发生混淆。此合成的拉力可以推算。如图(a)两个部分用高强度螺栓连接,取其中左边部分为自由体如图(b),如未受外加荷载时,可见螺栓中的预拉力为 T_o,相应于此 T。在被连接部分的接触面上有预压力 C_o,
In the steel structure, often encounter high strength bolts by tension joints. High-strength bolts in the original has been pre-tension, and then subjected to additional tension, the pre-tension and the synthesis of additional tensile force, and the actual tension existing in the bolt? Concept sometimes confusion occurs. This synthetic pull can be inferred. As shown in Figure (a) two parts with high strength bolts, whichever is the left part of the free body shown in Figure (b), without the applied load, the bolt can be seen in the pre-tension T_o, corresponding to this T. Pre-pressure C_o is applied to the contact surface of the connected portion,