Method for quickly leading in bolt connection slippage in space truss

Abstract

The invention provides a method for quickly leading in bolt connection slippage in a space truss, wherein an axial equivalent stiffness reduction model is established through stiffness reduction during design of an existing space truss structure, and influences brought by the bolt connection slippage to the space truss structure can be considered during analysis of the bolt slippage only by reducing material stiffness, so that the bolt connection slippage can be quickly led into an analytical program. By applying the method for quickly leading in the bolt connection slippage in the space truss provided by the invention, calculation results obtained during the design of the space truss structure can have high precision, and demands for actual engineering design can be satisfied.

Description

technical field [0001] The invention relates to the technical field of tower structure design, in particular to a design method for a space truss in a tower structure. Background technique [0002] The tower structure of high-voltage overhead transmission line mainly includes two parts, the support structure and the overhead line, and the support structure is mostly a space truss structure connected by welding or bolts. In the tower structure space truss, the bolt preload is usually small, and the bolts and There are structural gaps between the bolt holes, so the relative sliding between the connecting parts and the connected parts is very easy to occur at the bolted joints. A large number of real-type tower experiments show that the phenomenon of bolted joint slippage in space trusses is very common, and the bolt slippage It will affect the normal use of the tower structure, so it should be considered in the design process of the tower structure. [0003] However, in the p...

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Problems solved by technology

[0003] However, in the process of tower structure design, especially in the design and calculation of internal forces in space trusses, the influence of bolt slippage on internal force calculations is mostly not considered

"Journal of Shenyang Jianzhu University" published in September 2010 on pages 865 to 868 published "The influence of bolt slippage on the deformation of the power tower line structure" discloses the impact of bolt slippage on the structure of the power tower line, and provides a way to Bolt slippage is introduced into the tower structure design method, but this method is more complicated, and if the bolt connection slippage is introduced in the numerical simulation analysis process, the design difficulty will be greatly increased

At present, there is another method to deal with bolt slippage, which is to equate the bolt slippage into a spring element, but this is tantamount to reprogramming for the current analysis program that does not consider bolt slippage, so bolts are considered in the calculation of the internal force of the truss structure The slippage is extremely heavy and cannot meet the requirements of actual engineering design.

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