Device and method for strengthening concrete with prestressed fiber reinforced composite material

Abstract

The invention relates to a device and method for enhancing composite reinforced concrete through prestress fiber. The device comprises a fiber board, a fixed end clamp, fixed end steel grooves, fixed end clamp anchor bolts, fixed end steel strips, fixed end anchor bolts, fixed end fixing screws, fixed end nuts, a tensile end clamp, tensile end steel grooves, tensile end clamp bolts, tensile end clamp anchor bolts, tensile end steel strips, tensile end anchor bolts, tensile end fixing screws, tensile end nuts, tensile steel blocks, fixing bolts, a rectangular steel pipe, a lifting rocking rod, a rocking rod base, a jack, tensile screws, tensile screw nuts and the like. Large horizontal prestress can be provided through an external counterforce table tensile fiber board capable of rising and falling freely, and the device is suitable for reinforcing concrete components of different sizes; due to the double-screw structure of the tensile end, force is evenly exerted on the fiber board, no damage can be caused to the fiber board, and the eccentric problem in the tensile process is solved; by means of the embedded permanently-anchored serrated face clamp, the prestress loss is reduced to a large extent.

Description

technical field [0001] The invention relates to the technical field of reinforcing concrete components, in particular to a device and method for reinforcing concrete components with prestressed fiber reinforced composite materials. 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 d...

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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; however, there are two main problems in the existing direct tension reinforcement technology: (1) Uneven force application during the tension process , the fiber reinforced composite material is damaged prematurely during the tensioning process, which makes it difficult to obtain a large prestress; (2) lack of effective anchoring methods, resulting in excessive loss of prestress after the tension is completed, reducing the reinforcement effect

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