FRP-RC (fiber reinforced polymer-reinforced concrete) combined beam partially constrained by fiber sleeve and construction method of combined beam

A FRP-RC, local restraint technology, applied in the direction of chemical instruments and methods, joists, girders, etc., can solve the problems that the effect of steel bars cannot be fully exerted, hinder the development of reinforced concrete structures, and hinder the development of high-performance concrete, etc. It is beneficial to the earthquake resistance of the structure, improves the coordination ability of the overall stiffness and deformation, and improves the ultimate compressive strength

Inactive Publication Date: 2013-07-10
HUNAN UNIV
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Problems solved by technology

[0002] The traditional reinforced concrete beams mainly rely on the steel bars to bear the tension and the concrete bears the pressure to bear the load. However, the corrosion of steel bars is always a very difficult problem that hinders the development of reinforced concrete structures.
At the same time, in many cases, the compression zone of concrete is crushed in advance, causing the concrete structure to be destroyed in advance, and the role of steel bars cannot be fully exerted, which also hinders the development of high-performance concrete.
Moreover, the reinforced concrete structure needs to use many formworks in the forming process, which has a great impact on the construction progress.

Method used

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  • FRP-RC (fiber reinforced polymer-reinforced concrete) combined beam partially constrained by fiber sleeve and construction method of combined beam
  • FRP-RC (fiber reinforced polymer-reinforced concrete) combined beam partially constrained by fiber sleeve and construction method of combined beam
  • FRP-RC (fiber reinforced polymer-reinforced concrete) combined beam partially constrained by fiber sleeve and construction method of combined beam

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with accompanying drawing:

[0025] refer to Figure 1 to Figure 6 , the locally constrained fiber casing FRP-RC composite beam of the present invention, the steps are as follows:

[0026] 1) Preparation:

[0027] a) see figure 2 , The production of FRP formwork: make a U-shaped wooden formwork in advance according to the required size; spread the fiber cloth cut according to the design on a flat plastic film, impregnate it with epoxy resin, and lift it together with the plastic film Put it into the U-shaped wooden formwork according to the predetermined position, and then use a scraper to make it adhere to the formwork, and lay the corresponding layers according to the same steps; then, put the impregnated fiber cloth in the formwork according to the predetermined The laying method is pasted vertically, and rolled with rollers to make it completely soaked and pasted tightly, and pay atte...

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Abstract

The invention discloses an FRP-RC (fiber reinforced polymer-reinforced concrete) combined beam partially constrained by a fiber sleeve. The combined beam comprises an FRP formwork (1) for forming, a circular fiber sleeve (3) for improving the compressed property of concrete, and circular-arc-shaped pedestals (4) for fixing the fiber sleeve, wherein the FRP-RC combined beam has a rectangular section, the size of the section and the number of layers of FRP are determined through design calculation, and the length of the circular fiber sleeve is determined through calculation according to design needs. According to the invention, the structural bearing capacity is enhanced, the structural ductility is improved, and the construction progress is accelerated, therefore, the FRP-RC combined beam has relatively low engineering cost and is simple and convenient to construct.

Description

technical field [0001] The invention relates to a beam, in particular to a locally constrained fiber casing FRP-RC composite beam and a construction method thereof. Background technique [0002] The traditional reinforced concrete beams mainly rely on the steel bars to bear the tension and the concrete to bear the pressure to share the load. However, the corrosion of steel bars has always been a very difficult problem that hinders the development of reinforced concrete structures. At the same time, in many cases, the compression zone of the concrete is crushed in advance, causing the concrete structure to be destroyed in advance, and the role of the steel bars cannot be fully exerted, which also hinders the development of high-performance concrete. Moreover, the reinforced concrete structure needs to use many formworks during the forming process, which has a considerable impact on the progress of the construction. For this reason, this patent proposes a new type of locally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/29B32B37/02B32B13/14
Inventor 黄靓黄梅梅颜立波戴光校朱德举
Owner HUNAN UNIV
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