Method for realizing seismic reinforcement of pier by the aid of carbon fibers

Abstract

The invention relates to a method for realizing seismic reinforcement of a pier by the aid of carbon fibers. The method includes the steps: a, treating the surface of a pier body by filling fiber-containing high-strength mortar into an uneven position of the surface of the pier body and trowelling the uneven position; b, coating epoxy resin adhesives on the pier body to serve as a trowelling layer; c, pasting longitudinal carbon fiber fabrics on the pier body; d, pasting transverse carbon fiber fabrics; e, treating the root of the pier after the adhesives on longitudinal carbon fibers and transverse carbon fibers are completely solidified; and f, planting steel bars and pouring concrete into a bearing platform. Large tensile stress is resisted by pasting the longitudinal carbon fiber fabrics, development of transverse cracks is suppressed, core concrete crushing can be effectively restrained by the transverse carbon fiber fabrics, and shearing resistance is improved. A carbon fiber surface at the lapping position of the root of the pier body and the bearing platform is treated by steel plate battens, the steel bars are planted and the concrete is poured in the lapping length direction of surface carbon fibers of the bearing platform, wholeness of the pier in stress is improved, and the purpose of seismic reinforcement is achieved. The seismic reinforcement technique is simple in operational process, convenient in construction, small in occupied space and fine in reinforcement effect, and the additional load of the structure is not increased.

Description

technical field [0001] The invention belongs to the technical field of anti-seismic strengthening of engineering, and specifically relates to a bridge pier reinforced with carbon fiber, which improves the anti-seismic performance of the pier structure, thereby resisting earthquake damage. Background technique [0002] Bridges are generally built to cross valleys, rivers, or to cross certain traffic obstacles, and they play an important role in transportation. Once an earthquake occurs, bridges with insufficient earthquake resistance will be severely damaged or even collapsed, resulting in interruption of traffic, obstruction of goods delivery, and huge secondary disasters. This has been exemplified in earthquakes in recent years. However, as the main load-bearing part of the bridge, the bridge pier is the first to be tested by the earthquake when an earthquake occurs. Therefore, it is necessary to carry out seismic reinforcement for some existing bridge piers with insufficie...

AI Technical Summary

Problems solved by technology

In the current bridge reinforcement project, there are reinforcement technologies such as outsourcing concrete enlarging section method, bonding steel method, and changing structural system reinforcement method, but these reinforcement methods are relatively complicated in construction and are mainly limited to repairing damaged parts of the structure, restricting crack expansion, Functions such as improving structural strength do not involve improving the seismic performance of the structure, and are not perfect for improving the overall mechanical performance of the structure.

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