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潁州鋼結構在安裝過程中有哪些要點該注意？

?鋼結構工程主要的建筑結構類型之一。是現(xiàn)代建筑工程中較普通的結構形式之一。中國是最早用鐵制造承重結構的國家，鋼結構工程是以鋼材制作為主的結構。鋼結構在安裝過程中有哪些要點該注意？

（1）摩擦系數(shù)：其中F為抗滑移試驗所測得的使試件產(chǎn)生初始滑移的力，nf為摩擦面數(shù)，為與F對應的高強螺栓擰緊預拉力實測值之和。

（2）扭矩系數(shù)：，其中d為高強螺栓公稱直徑(mm)，M為施加扭矩值（N﹒M ），P為螺栓預緊力。10.9級高強度大六角螺栓連接必須保證扭矩系數(shù)K的平均值為0.110～0.150。其標準偏差應小于等于0.010。

（3）初擰扭矩：為了縮小螺栓緊固過程中鋼板變形的影響，可用二次擰緊來減小先后擰緊螺栓之間的相互影響。高強螺栓第一次擰為初擰，使其軸力宜達到標準軸力的60%～80%。

（4）終擰扭矩：高強螺栓最后緊固用的扭矩為終擰扭矩。考慮各種預應力的損失，終擰扭矩一般比按設計預拉力作理論計算的扭矩值大5%～10%。

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