Construction method of prestress carbon fiber cloth reinforced reinforced-concrete square pillar

A reinforced concrete and carbon fiber cloth technology, which is applied in building maintenance, construction, building construction, etc., can solve the problems of insufficient thickness of steel protective layer, damage of reinforced RC square columns, time-consuming and laborious noise and dust, etc., so as to improve the reinforcement effect and avoid The effect of the exposed anchorage and the reduction of frictional resistance

Active Publication Date: 2017-03-22
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

This method is aimed at using the self-locking anchorage to wrap the reinforced concrete square column with circumferential prestressed carbon fiber cloth, and manually grind the four corners of the square column to form arc angles. This pr

Method used

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  • Construction method of prestress carbon fiber cloth reinforced reinforced-concrete square pillar
  • Construction method of prestress carbon fiber cloth reinforced reinforced-concrete square pillar
  • Construction method of prestress carbon fiber cloth reinforced reinforced-concrete square pillar

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Embodiment

[0046] Such as Figure 1~12 As shown, this embodiment takes a 300mm side length RC square column as the reinforcement object, and uses prestressed CFRP to reinforce the RC square column. The construction method includes the following steps:

[0047] Step 1. Prefabricated modularized reactive powder concrete (RPC) cushions. The RPC cushions include corner arc blocks 4, ordinary rectangular blocks 5 and anchor side rectangular blocks 3. The radius of the corner arc block 4 is 30mm, the corresponding central angle is 90 degrees, and the length of the cushion block tangent to the arc corner is 50mm; the length of the ordinary rectangular block 5 and the anchor side rectangular block 3 along the column section direction is 100mm. The corner of the anchor side rectangular block on the side of the anchor is an arc corner with a radius of 10mm. The thickness of all pads is 30mm consistent with the thickness of the anchor. The height of the pad is the width of the pre-stressed CFRP clot...

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Abstract

The invention discloses a construction method of a prestress carbon fiber cloth reinforced reinforced-concrete square pillar. The method comprises the steps that a modularized reactive powder concrete (RPC) cushion block (an angle radian block, a common rectangular block and an anchor side rectangular block) is prefabricated, the surface of the cushion block is coated with an epoxy adhesive layer evenly so as to be smooth, and the pre-stress friction loss of carbon fiber-reinforced plastic (CFRP) cloth is reduced; the cloth is bonded to the surface of the reinforced reinforced-concrete (RC) square pillar so that arc angles can be formed; a self-locking anchor is embedded in a groove formed by the RPC cushion block and the surface of the reinforced RC square pillar, and the anchor is sealed with RPC after tension prestress is exerted; a transparent tape is bonded to the surface of the carbon fiber cloth before wrapping is carried out so that burrs at the edges are avoided; and after the carbon fiber cloth is tensioned, the surface of the carbon fiber cloth is coated with an epoxy adhesive layer, so that the overall bearing capacity is improved. According to the method, construction steps are clear, simple and practical, noise and a large amount of dust generated in the arc angle grinding process are avoided, the reinforced RC square pillar is prevented from being damaged by grinding, and rapid reinforcement of the RC square pillar through prestress FRP is achieved.

Description

Technical field [0001] The invention belongs to the technical field of structural reinforcement, and specifically relates to a construction method for reinforcing reinforced concrete square columns with prestressed carbon fiber cloth. This method uses self-locking anchors to prestress the carbon fiber cloth, so that the core part of the reinforced concrete square column (ie, the RC square column) is in a three-way compression state, thereby improving its bearing capacity and achieving a reinforcement effect. This method is suitable for general bridges and housing constructions, especially for large-scale public buildings (such as schools, shopping malls) for the reinforcement and reconstruction of reinforced concrete square columns that are mainly subjected to axial pressure. Background technique [0002] In recent years, the number of bridges and buildings that need to be reinforced has increased. For reinforced concrete columns, the traditional reinforcement methods include enl...

Claims

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Application Information

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IPC IPC(8): E04G23/02
CPCE04G23/0218
Inventor 卢春玲王强朱万旭魏峰吴有胜
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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