Reinforced concrete members will exhibit certain deformation or damage after exceeding a certain number of years. Some buildings or structures are used beyond their own limit of use; some are due to poor quality of construction; in this situation, it is often difficult to demolish and rebuild due to the reasons for the quality or service life. To continue to use it, the construction needs to be reinforced, reinforced, reformed and repaired. The reinforcement and reconstruction methods of reinforced concrete structures have their own characteristics.

• Adhesive fiber reinforced plastic reinforcement method.

The reinforcement and reinforcement of the external fiber reinforcement is a resin cementing material, which is attached to the tensile region of the reinforced component to work together with the reinforced section, so as to reach the purpose of strengthening and strengthening the structural members and improving the structural mechanical properties.

• The method of supporting and strengthening is added.

The added support method is to reduce the calculation span of the flexural member by adding the supporting point, thus reducing the bending moment on the reinforced component and dispersing the bearing capacity of the member. According to the different mechanical properties of supporting members, it can be divided into two kinds of reinforcement methods: rigid supporting point and elastic fulcrum.

• Adhesive bonded steel reinforcement method.

The reinforcement of the outsourced steel is the reinforcement of the four or two angles of the reinforced steel (usually angle steel or channel steel) or steel plate in the reinforced component. The reinforced concrete beam of the outsourced steel is also called the wet outsourced steel reinforcement. When the method is used to reinforce the concrete members, the epoxy resin adhesive is used to fill the steel and the steel is reinforced. The component is bonded into a whole to ensure that the steel frame and the original component form an integral whole effectively.

• Bonded steel plate reinforcement method.

The reinforcement of steel reinforced concrete flexural members is a steel plate with high strength in the missing section of the bearing capacity of the component (positive section, cross section compression zone or oblique section), which makes the original reinforced concrete and steel plate as a new force as a whole, and the deformation of the concrete is strengthened, and the reinforced component is strengthened. The flexural, shear and compressive properties of the steel plate are effectively played, and the stress concentration will not be produced in the reinforced concrete members, and the method is strengthened by this method.

• Strengthen the section reinforcement method.

In the compression zone of reinforced concrete compression member, the concrete cast-in-place layer is added to increase the effective height of the section, expand the section area, thus improve the bending capacity of the section, the shear ability of the cross section and the overall stiffness of the component, and play the role of strengthening and strengthening. The method of enlarging section reinforcement must deal with the interface between the new part and the original part in order to make it become an integral whole.