Node crack prevention and reinforced structure of reinforced concrete and manufacture method thereof

Abstract

The invention discloses a node crack prevention and reinforced structure of reinforced concrete and a manufacture method thereof. In the structure, an embedded heterotype steel plate, which has the same shape as that of a node and the edge size of 2.5-3cm less than the node edge size, is arranged on a node reinforcement longitudinal section. Round holes with the diameter of 5cm are processed on the steel plate, and the amount of the round holes ensures the hollowing ratio of the steel plate to be 30-35 percent; the thickness of the heterotype steel plate is 5mm to 10mm; and a Q235 type steel plate is selected for the steel plate. An arrangement mode is determined according to the thickness and the stress condition of a concrete component at the node part. The invention prevents cracking of the concrete node at root, completely solves the problem of node cracking which troubles engineering departments including road, industrial civil construction, bridge and water conservancy for many years on the premise of not obviously increasing the engineering cost, ensures the safe use of a newly constructed reinforced concrete structure, stops troubles in the bud and greatly saves the maintenance fund of the concrete structure.

Description

technical field [0001] The invention belongs to the technical field of building structures, and in particular relates to reinforced concrete joint reinforcement structures. Background technique [0002] Joint cracking of reinforced concrete rigid frame arch bridges, truss arch bridges, and reinforced concrete frames is a common structural problem at home and abroad, which greatly reduces the safety and durability of concrete structures. The current solution is to increase the reinforcement ratio to control it, but the effect is not ideal. In view of the complexity of the stress on reinforced concrete joints and the repetition of external loads, it is difficult to effectively suppress the cracking of joints simply by increasing the reinforcement ratio. If there are too many reinforcements at the joints, it will be difficult to vibrate and compact the concrete during the construction process, which will affect the quality of the concrete; if there are too few reinforcements, ...

AI Technical Summary

Problems solved by technology

Although this method can effectively inhibit the development of the original cracks, it has the following shortcomings: 1. The externally bonded special-shaped steel plate is pasted after the joint is found to have cracks, which is an after-the-fact remedy. Due to the difference in material properties, the steel plate It is not coordinated with the force of the concrete joint, especially when the joint is under fatigue load, the pasted special-shaped steel plate is easy to peel off or even fall off, resulting in the failure of the joint reinforcement, and it is not a cure for the symptoms; The anti-corrosion treatment of the steel plate greatly increases the post-management cost and maintenance cost; 3. The material and construction costs of the externally bonded steel plate reinforcement joints are much higher than the built-in steel plate reinforcement joints, which is uneconomical

Images