A composite roof truss with frp cables for the lower chord

Abstract

The invention discloses a combined roof truss with a lower chord adopting an FRP rope. According to the combined roof truss, the lower chord is provided with the FRP rope, and an upper chord is a sectional material made of a traditional material or an FRP material, can be in an inverted-V shape, or polygonal line shape or curve shape and is connected with an upper end connecting plate through bolts. The upper chord is connected with a web rod through the upper end connecting plate or by welding. The lower end of the web plate is connected with the lower chord FRP rope through a connecting plate with a sleeve. The FRP rope penetrates through the sleeve and can slide in the sleeve. The middle of the lower chord FRP rope can pass the anchoring end and is connected with a roof truss middle web rod through the connecting plate. The lower chord FRP rope penetrates through reserved holes at the two ends of the upper chord and is anchored at the ends of the upper chord rod. The lower chord FRP rope can apply prestress and then is anchored. The combined roof truss has the advantages of attractive appearance, definite force transmission, low weight, high cross capacity, corrosion resistance and high practicality.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a composite roof truss whose lower chord adopts FRP cables. Background technique [0002] Roof trusses composed of quilting frames are widely used in houses of various spans. The upper chord and many web members in the quilting frame are mainly under pressure, while the lower chord is mainly under tension. Therefore, it is a reasonable design to use profiles with relatively high compressive stability and strength to make the upper chord and web, and use materials with good tensile strength and rigidity to make the lower chord. Fiber-reinforced plastic (FRP) is a composite fiber material, which is composed of synthetic or organic high-strength fibers. It is a new type of composite material. Strength, fatigue resistance, electromagnetic neutrality, low thermal conductivity, etc., but the shear strength of FRP is low, and its strength is only 5%-20% of...

AI Technical Summary

Problems solved by technology

Fiber reinforced plastic (FRP) is a composite fiber material, which is composed of synthetic or organic high-strength fibers. It is a new type of composite material. It has light weight, easy construction, more durable than reinforced concrete structures, corrosion resistance, and high tensile Strength, fatigue resistance, electromagnetic neutrality, low thermal conductivity, etc., but the shear strength of FRP is low, and its strength is only 5%-20% of the tensile strength, which makes FRP members suitable for tension members in structures, And it should avoid bearing shear force. Therefore, it is of great significance to have a composite roof truss with FRP cables for the lower chord, which is energy-saving and environmentally friendly, has a beautiful form, clear force transmission, light weight, large spanning capacity, corrosion resistance, and strong practicability.

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