Construction method of reinforced concrete square column reinforced with prestressed carbon fiber cloth
A technology of reinforced concrete and carbon fiber cloth, which is applied in building maintenance, construction, building structure, etc., can solve the problems of insufficient thickness of steel protective layer, damage of reinforced RC square column, time-consuming and laborious noise and dust, etc., to improve the reinforcement effect, avoid Anchors are exposed and the effect of reducing frictional resistance
Active Publication Date: 2018-11-23
GUILIN UNIVERSITY OF TECHNOLOGY
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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 process is time-consuming, laborious and noisy. , pollute the environment; and grinding will cause damage to the reinforced RC square column, the thickness of the protective layer of the steel bar is insufficient, and the steel bar leaks out
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Embodiment
[0046] Such as Figure 1-12 As shown, in this embodiment, the RC square column with a side length of 300 mm is used as the reinforcement object, and the RC square column is reinforced with prestressed CFRP. The construction method includes the following steps:
[0047] Step 1. Prefabricate a modular reactive powder concrete (RPC) block, the RPC block includes a corner arc block 4 , a common rectangular block 5 and an anchor side rectangular block 3 . The radius of the corner arc block 4 arc is 30mm, the corresponding central angle is 90 degrees, and the length of the pad tangent to the arc angle is 50mm; the length of the ordinary rectangular block 5 and the anchorage side rectangular block 3 along the direction of the column section is uniformly 100mm. The corner of the rectangular block on the anchorage side is rounded to an arc with a radius of 10mm. The thickness of all pads is 30mm consistent with the thickness of the anchor. The height of the spacer is the width of the...
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Abstract
The invention discloses a construction method for reinforcing reinforced concrete square columns with prestressed carbon fiber cloth. Prefabricated modular reactive powder concrete (RPC) pads (corner arc blocks, ordinary rectangular blocks and anchor side rectangular blocks), the surface of which is evenly coated with epoxy adhesive layer to form a smooth surface, reducing the prefabrication of CFRP cloth. Stress friction loss; paste it to the surface of the reinforced RC square column to form an arc angle; embed the self-locking anchor in the groove formed by the RPC pad and the surface of the reinforced RC square column, and use RPC after tensioning and prestressing Anchor sealing; before wrapping, apply scotch tape to the surface of the carbon fiber cloth to prevent the edge from detaching; after the carbon fiber cloth is stretched, apply a layer of epoxy glue on its surface to improve its overall mechanical performance. The method of the invention has clear, simple and practical construction steps, avoids noise and a large amount of dust generated in the grinding process of the arc angle, avoids damage to the reinforced RC square column by grinding, and realizes rapid reinforcement of the RC square column by prestressed FRP.
Description
technical field [0001] The invention belongs to the technical field of structure reinforcement, and in particular relates to a construction method for reinforcing reinforced concrete square columns with prestressed carbon fiber cloth. In this method, the self-locking anchor is used to prestress the carbon fiber cloth, so that the core part of the reinforced concrete square column (that is, the RC square column) is in a three-dimensional compression state, thereby improving its bearing capacity and achieving a reinforcement effect. This method is applicable to general bridges and building constructions, and is especially applicable to reinforcement and reconstruction projects of reinforced concrete square columns mainly subjected to axial pressure in large public buildings (such as schools and shopping malls). Background technique [0002] In recent years, more and more bridges and housing buildings need to be reinforced. For reinforced concrete columns, the traditional reinf...
Claims
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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