Composite strengthening method through fiber-reinforced high-damping polymer concrete coated with carbon fiber cloth

Abstract

The invention discloses a composite strengthening method through fiber-reinforced high-damping polymer concrete coated with carbon fiber cloth. The composite strengthening method comprises the following steps that the outer surface of an original concrete beam is removed, and thus the structural layer is exposed to reach the aggregate face of the original concrete beam; paying off, drilling and hole cleaning are conducted on the aggregate face of the original concrete beam, shear pins are embedded in through anchor adhesive, and a reinforcing mesh is bound; after an interface agent is smeared on the aggregate face of the original concrete beam, a fiber-reinforced high-damping polymer concrete material is smeared to reach the designed thickness; and after maintenance, a binder is brushed on the surface of a fiber-reinforced high-damping polymer concrete reinforced layer, the carbon fiber cloth is pasted, and reinforcement of the original concrete beam is completed. According to the composite strengthening method, the good deformability and anti-seismic energy dissipation ability of the fiber-reinforced high-damping polymer concrete and superhigh strength of the carbon fiber cloth are used, thus the sectional dimension change is small, the influences on the structure clearance and the appearance are small, the overall anti-seismic property is good, the structure is simple, construction is convenient, and popularization is easy.

Description

technical field [0001] The invention relates to the technical field of maintenance and reinforcement of existing building structures, in particular to a fiber reinforcement that can work in coordination with the original concrete beams, a composite reinforcement layer, small change in section size, little influence on structural clearance and appearance, and good overall seismic performance. Composite reinforcement method of high damping polymer concrete covered with carbon fiber cloth. Background technique [0002] Due to natural factors such as material aging and environmental erosion, human factors such as construction errors and cutting corners, changes in functional requirements, and disasters such as fires and earthquakes, a large number of houses need to be renovated. If the method of tearing down and rebuilding is adopted, the huge cost will not be tolerated by the current economic situation in our country. A more reasonable method is to carry out maintenance and rei...

AI Technical Summary

Problems solved by technology

These reinforcement methods can improve the bearing capacity of the structure to a certain extent and improve the seismic performance, but each has its own shortcomings: the external prestressing method and the outsourcing steel reinforcement method are complicated in the force of the anchorage node area and difficult to deal with the structure, so it is difficult for construction. The requirements are relatively high; the reinforcement method of adding steel bars in the tension area and sticking steel cannot be applied to areas with high humidity because the steel is exposed and easy to corrode; although the method of increasing the section of the component does not have the problems of complicated node processing and steel corrosion, the increase in section height will Affect the appearance and structural headroom; although the widely used FRP reinforcement method is convenient for construction, due to the poor ductility of FRP itself, it is prone to peeling damage at the end of the FRP. The actual utilization rate is only 30%, and the structural deformation performance after reinforcement decline, which is not conducive to energy consumption under earthquake action