Manufacturing method of frp bar-angle steel combined cross arm for transmission tower

Abstract

The invention discloses a method for manufacturing a FRP rib-angle steel combination cross arm for a power transmission tower. The method includes the steps that firstly, required FRP ribs, angle steel members and various connecting members are made according to a design drawing of a proposed power transmission tower; secondly, according to the design drawing, various FRP ribs are installed on theupper portion of a cross arm of the power transmission tower in a combination mode by adopting FRP rib connecting parts, the lower portion of the cross arm is constructed of the angle steel members,and thus a reinforced fiber composite (FRP) rib-angle steel member combination cross arm is formed; and meanwhile, the lower portion of the cross arm should be uptilted at a fixed angle alpha in the process of construction, and flexural deformation of the FRP ribs on the upper portion of the cross arm under the action of gravity or wind load on wires, insulators and the like is counteracted, so that the fact that the cross arm is always straight in the process of using is ensured. According to the method for manufacturing the FRP rib-angle steel combination cross arm for the power transmissiontower, reduction or avoidance of corrosion and fatigue damage of key rod members of the power transmission tower are facilitated, the service life of the power transmission tower is prolonged, and high performance reinforced fiber composites are widely used and promoted in power transmission tower construction step by step.

Description

technical field [0001] The invention belongs to the technical field of special structures, and specifically relates to the construction technology of combining reinforced fiber composite material (FRP) bars and angle steel members to develop a new composite structure cross arm suitable for transmission towers in various places. Background technique [0002] As an important secondary energy, electricity plays a pivotal role in the vigorous development of the economy and the rapid improvement of people's living standards, and its consumption demand is increasing day by day. In order to solve the problem of resource depletion and increasingly prominent energy demand, long-distance electric energy transmission has played a very important role. However, due to the long transmission distance, the transmission loss is relatively large. For this reason, high-voltage transmission lines that can not only solve the energy consumption caused by long-distance transmission but also realiz...

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Problems solved by technology

[0007] As far as the mechanical characteristics of transmission towers are concerned, as mentioned above, environmental corrosion and wind-induced fatigue damage are unfavorable factors that are difficult to overcome in the degradation of mechanical properties of transmission tower components such as angle steel and steel pipes. The performance is generally stronger than its compression performance. If all reinforced fiber composite materials (FRP) are used, it will inevitably cause waste of materials.

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