frp-concrete-steel double-wall composite pipe beam and beam-slab composite structure using the beam

Abstract

The invention relates to a novel FRP (fibre-reinforced polymer)-concrete-steel double-wall combined tubular beam and a beam-slab combined structure adopting the same. The double-wall combined tubular beam comprises an FRP outer tube, a steel inner tube and concrete filled between the FRP outer tube and the steel inner tube, wherein a plurality of shear connectors are arranged at one side of the steel inner tube where the concrete is consolidated; and the steel inner tube can be eccentrically arranged toward the tension side of the combined tubular beam relative to the FRP outer tube. The beam-slab combined structure comprises (1) a beam-slab structure formed by the double-wall combined tubular beam and a lightweight corrosion resistant slab (like an FRP or aluminium slab) arranged on the double-wall combined tubular beam; and (2) a beam-slab structure formed by the double-wall combined tubular beam and an FRP bar concrete slab, wherein the upper part of the double-wall combined tubular beam is combined in the bottom layer of the FRP bar concrete slab to form a whole body. The combined tubular beam has very good corrosion resistance, low cost, light weight and good ductility and can be constructed and connected with other members easily.

Description

technical field [0001] The present invention relates to a force-bearing component in structures such as bridges and buildings, and more specifically relates to an FRP-concrete-steel double-wall composite pipe beam and a beam-slab composite structure using the composite pipe beam. Background technique [0002] Beam components commonly used in engineering structure fields such as bridges and buildings include reinforced concrete (Reinforced concrete, RC) beams and steel beams. The corrosion resistance of these two kinds of beam components is poor, and they are easy to corrode and degrade in harsh environments such as the field, coastal areas or wet places. [0003] In order to solve the problems of durability and degradation of buildings and bridge structures all over the world, fiber-reinforced polymer (fibre-reinforced polymer, FRP) composite materials have been more and more widely used in recent years. FRP is a new type of non-metallic material composed of high-performanc...

AI Technical Summary

Problems solved by technology

In the above beam members, FRP is the main longitudinal force-bearing material, and the amount is usually large, which leads to high cost of the beam members. At the same time, the deformation rather than the load-bearing capacity of the members often becomes the controlling factor of the design due to insufficient stiffness of the members; in addition, these beams The component also has poor ductility due to the brittleness of the FRP material

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