A reinforcement system and construction method for improving the bearing capacity of concrete structures

Abstract

The invention discloses a reinforcing system capable of improving load bearing capacity of concrete structures and a construction method of the reinforcing system. The reinforcing system comprises an arch ring, arch feet and a steel beam, the steel beam is connected on the undersurface of a reinforced structure girder, a midspan top of the arch ring is connected with the undersurface of the steel beam, and two ends of the arch ring are connected with concrete structures on two sides of the reinforced structure girder through the arch feet respectively. The reinforcing system can substantially improve load bearing capacity of reinforced concretes, can be flexibly adjusted and is more scientific and reasonable in structural stress, high in reinforcing efficiency, convenient and quick in subsequent maintenance, high in fireproofness, long in service life and high in comprehensive economic benefit.

Description

technical field [0001] The invention belongs to the technical field of concrete structure reinforcement, and in particular relates to a reinforcement system and a construction method for improving the bearing capacity of concrete structures. Background technique [0002] At present, there are many methods for strengthening concrete structures, such as pasting steel plates, pasting carbon fibers, steel wire mesh-composite mortar external layer reinforcement, enlarging cross-section reinforcement and external prestress reinforcement, but each method has its shortcomings. [0003] The method of pasting the steel plate is to improve the bearing capacity of the beam by pasting the steel plate at the bottom of the reinforced beam body. The method of pasting the steel plate to strengthen the structure has a single form, and the improvement of the bearing capacity is low. The connection between the steel plate and the concrete beam is a key part, and it is also a weak part. It canno...

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Problems solved by technology

The disadvantages are: (1) The performance and quality requirements for composite mortar are relatively high, and the products (polymer mortar) available on the market generally have poor performance, and safety and quality problems are prone to occur if they are not specially prepared; (2) High-strength mortar The unit price of stainless steel wire and high-performance composite mortar is relatively high, which is insufficient from an economic point of view. In addition, the reinforcement effect on the structural bearing capacity is limited; (3) Before use, a more detailed technical and economic comprehensive evaluation is required to determine its applicability sex

The existing problems are (1) the external cable is arranged outside the section, so it is relatively difficult to prevent corrosion and protection, and it is easily affected by the outside world

(2) Stress concentration is easy to occur in the anchorage and steering area, and the local stress is large, which requires high anchorage construction

(3) The tensile force of the external cable is small, and the advantages of high strength of the external cable cannot be fully utilized, and the requirements for anchors and clips are very high

(4) The deformation of external prestressed tendons is inconsistent with the deformation of concrete, which is easy to cause prestress loss, and has a low improvement in the structural bearing capacity

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