Prestressed carbon plate-ECC combined reinforced concrete structure and construction method

Abstract

The invention discloses a prestressed carbon plate-ECC combined reinforced concrete structure and a construction method. A cement-based composite material ECC layer, a prestressed plate and a cement-based composite material ECC layer outer protective layer are laminated at the bottom of a concrete beam; the plate is protected on the outer side of the plate reinforced by the prestressed plate by utilizing good durability such as crack resistance and impermeability of the cement-based composite material ECC, so that the erosion effect of the external severe environment on the plate is isolated, and meanwhile, the overall bearing capacity of the concrete beam and the crack resistance of the beam bottom can be improved; and the ECC layer is arranged between the prestressed plate and the concrete, so that the stripping of the plate can be delayed due to the characteristics of fine cracks, the interfacial shear stress is effectively transmitted, and the advantage of high tensile strength of the plate is better exerted.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to a prestressed carbon plate-ECC combination reinforced reinforced concrete structure and a construction method. Background technique [0002] In building structures, reinforced concrete beams, as the main stressed members, play an important role in transferring loads. For some buildings whose function is changed to increase the load, or the damaged structure after an earthquake, the beams in the structure need to be reinforced. On the other hand, most concrete beams are working with cracks. In the atmospheric environment, especially in corrosive environments, the steel bars in the beam body will corrode as time goes by, and the concrete will appear rust swelling cracks, resulting in bearing capacity fall, it cannot continue to function properly, and it also needs to be reinforced. [0003] Common methods for strengthening reinforced concrete beams include...

AI Technical Summary

Problems solved by technology

However, there are the following defects: ①In the near-surface reinforcement method, the reinforcement plate is at the bottom of the beam, and the interface between the reinforcement end and the concrete is prone to peeling and splitting damage in harsh environments, which leads to the inability to make full use of reinforcement materials; ② In order to achieve corrosion resistance, this reinforcement method generally uses fiber-reinforced composite materials, but fiber-reinforced composite materials are brittle materials, which will eventually cause brittle failure of the reinforced beam, and are not suitable for use in earthquake-resistant areas; Expensive, on the other hand relatively poor durability

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