PRETIGHTENING FORCE AND STRESS RELAXATION OF FRP CONSTRUCTION BOLT JOINT
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摘要: 应用螺栓-垫圈应力理论对FRP 结构搭接点预紧力进行了研究。理论计算的预紧力与垫圈的尺寸, 在结构试验初期与试验数据相吻合, 但随时间的增长, 由于基体的松弛效应, 预紧力有明显的减小, 然后在某一数值上又趋于稳定, 但重新按原预紧力紧固螺栓后, 1. 5 年的试验结果表明, 接点的应力松驰得到非常明显的抑制, 取得了预定的效果。
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关键词:
- FRP 螺栓接点, 预紧力, 应力松弛
Abstract: The pretightening force of FRP construction bolt joint has been researched in the theory of bolt washer stress. The computed pretightening force of bolt and washer size reach the prefigurative result in the construction test, but the pretightening force of bolt was decreased obviously by the time increase for matrix relaxation effect, and then tending towards a stable value.-
Key words:
- bolt joint
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