A Repair and Strengthening Method for Corroded Reinforced Concrete Beams Based on Arch Effect

Abstract

The invention relates to a corroded reinforced concrete beam repairing and strengthening method based on an arch effect and belongs to the technical field of performance evaluation and repairing of the existing structure of the civil engineering. The method includes that the concrete surface of a 10mm-wide region at the position of a corroded expansion crack of an anchorage region on the bottom face, a filling port is formed in the corroded expansion crack at intervals, epoxy resin is filled into the corroded expansion crack in the anchorage region from the reserved filling port in a low pressure filling method, and maintaining is conducted. Carbon fiber cloth covers the bottom face of the anchorage region and the region between pivots to bond the carbon fiber cloth located in the anchorage region to the bottom face of the reinforced concrete beam. Finally the carbon fiber cloth wraps the top face and two sides of the anchorage region of the reinforced concrete beam and the bottom face of the anchorage region bonded with the carbon fiber cloth, and the carbon fiber cloth and the periphery of the anchorage region are bonded. The corroded reinforced concrete beam repairing and strengthening method is simple in process and capable of effectively reducing construction period and reducing maintenance cost. Bearing performance of the structure is effectively restored.

Description

technical field [0001] The invention relates to a repair and reinforcement method for a corroded reinforced concrete beam based on an arch effect, and belongs to the technical field of performance evaluation and repair of existing structures in civil engineering. Background technique [0002] The material deterioration caused by the corrosion of steel bars directly affects the bearing capacity and durability of reinforced concrete structures, especially after 15 to 20 years of use in port and coastal reinforced concrete structures, the steel bars inside the concrete begin to corrode. The repair and reinforcement measures of corroded reinforced concrete structures have become an important research topic. The traditional repair and reinforcement measures for corroded reinforced concrete beams are to restore the bonding performance between corroded steel bars and concrete. [0003] There are two methods commonly used in engineering: one, the concrete around the corroded steel ...

AI Technical Summary

Problems solved by technology

It can be seen that the above two repair and reinforcement methods have shortcomings, mainly in the following two points: the impact on the normal use of the structure repair and reinforcement period is relatively large, and the curing period of the concrete poured during the repair is long; the beam is not fully utilized. "Arch Effect" to Improve the Residual Bearing Capacity of Corroded Beams

Images