Self-anchored prestressed fiber reinforced composite cloth reinforced concrete device and method

Abstract

The invention relates to a self-anchored pre-stressed fiber reinforced composite cloth based concrete strengthening device and method.The device comprises fiber cloth, a fixing end clamp, fixing end clamp anchor bolts, a fixing end steel groove, fixing end anchor bolts, fixing end fixing screw rods, a tensioning end clamp, tensioning end clamp anchor bolts, tensioning end clamp bolts, a tensioning end steel groove, tensioning end anchor bolts, tensioning end fixing screw rods, a tensioning screw rod, a jack, a force sensor and the like.By formation of the self-anchored counterforce tensioning fiber reinforced composite cloth on the surface of a strengthening part, a complex external tensioning platform is avoided; due to a double-screw structure of a tensioning end, uniform force application of the fiber cloth is realized, damages of the fiber cloth are avoided, and the problem of eccentricity in a tensioning process is solved.In addition, by integration of anchoring and tensioning clamps, prestress loss is reduced.The device is capable of providing high prestress and suitable for strengthening of concrete components in different sizes.

Description

technical field [0001] The invention relates to the technical field of reinforcing concrete components, in particular to a self-anchored prestressed fiber reinforced composite material cloth reinforcing concrete device and method. Background technique [0002] Reinforced concrete structures have been widely used in transportation, industrial construction and other fields. In order to eliminate the potential safety hazards caused by overload and fatigue, it is necessary to reinforce the damaged structural components to prolong their service life. [0003] Fiber-reinforced composite materials are widely used in the reinforcement of flexural concrete structures due to their small size, light weight, high strength, good corrosion resistance, strong fatigue resistance and convenient construction. However, the non-prestressed reinforcement method is mainly used in traditional fiber-reinforced composite material reinforcement projects. This reinforcement method has the following di...

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Problems solved by technology

However, the non-prestressed reinforcement method is mainly used in traditional fiber-reinforced composite material reinforcement projects. This reinforcement method has the following disadvantages: it cannot recover the damage of the original structure in time and change the deformation of the original structure; it cannot give full play to the high performance of fiber-reinforced composite materials. Strength, low overall reinforcement efficiency

The indirect method is not commonly used in actual engineering because it can only provide a small prestress and requires specific devices; while the existing direct tension reinforcement technology has two main problems: the force is not uniform during the tension process, and the fiber reinforced The composite material is damaged prematurely during the tensioning process, which makes it difficult to obtain a large prestress; the lack of effective anchoring methods leads to excessive loss of prestress after the tension is completed, reducing the reinforcement effect

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