考虑法兰螺栓滑移的多棱锥型钢管杆挠度及附加弯矩研究

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关键词：输电线路；拔梢钢管杆；螺栓滑移；截面惯性矩；挠度；附加弯矩中图分类号：TU311 文献标志码：A

Abstract：Multi-pyramid steel pipe pole is widely used in transmission lines around cities，and flange connection is usually used for pipe to pipe connection.In view of the relatively single theoretical calculation method for the deflection of multi pyramid steel pipe pole，this paper willcombine the bolt slip of flange joint according to the deflection curve differential equation theory of beam，and deduce the common load （bending moment M ，horizontal force P and uniformly distributed force q ）calculation method of deflection and additional bending moment of multi pyramid steel pipe pole under action.It is suggested to calculate the slip amount of flange plate according to the clearance of bolt hole and consider the corresponding angle amplification factor.Finaly，some important conclusions are drawn from the comparative analysis of typical steel pipe pole.The displacement value calculated without considering the slip of flange bolt has about 7% （204号 eror with the solution of finite element method，and the deflection caused by additional bending moment accounts for about 2% of the total deflection.

Key words：transmission line； taper steel pipe pole；bolt slip；section moment of inertia；deflection; additional bending moment

随着城市建设的高速发展，线路走廊资源非常紧张，架空钢管杆是有效解决走廊问题的主要途径之一。（剩余9301字）