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Method for prestress binding steel reinforced concrete structure

A concrete structure and prestressing technology, which is applied in building construction, building maintenance, construction, etc., can solve the problems that the improvement effect of bearing capacity and stiffness is not obvious

Inactive Publication Date: 2005-08-03
LANZHOU JIAOTONG UNIV +1
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Problems solved by technology

[0003] At present, among the commonly used concrete structure reinforcement methods, the bonded steel reinforcement method and the carbon fiber cloth reinforcement method are widely used. Although these two methods can effectively improve the ultimate bearing capacity of the structure in the damage stage, they have a negative effect on the bearing capacity and the normal use stage of the structure. The improvement in stiffness is not obvious

Method used

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  • Method for prestress binding steel reinforced concrete structure

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Embodiment Construction

[0024] 1 The method of pasting the steel plate with initial tension to strengthen the concrete structure adopts the following process:

[0025] ①. According to the original design data of the reinforced concrete structure, as well as the inspection and evaluation of the structure, design the reinforcement parameters.

[0026] ②. Surface treatment is carried out on the reinforced structure and the bonding surface of the steel plate, mainly grinding and cleaning.

[0027] ③. Drill high-strength bolt holes at the corresponding positions of the structure to be reinforced and the steel plate (the position of the bolt hole on the steel plate should consider the elongation of the tensioned steel plate).

[0028] ④. Install the steel plate on a special stretching frame that can be used repeatedly, and stretch it to control the stress.

[0029] ⑤. Use a spatula to apply structural adhesive on the treated concrete surface and steel plate at the same time.

[0030] ⑥. Use fasteners to ...

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Abstract

The present invention relates to method of applying prestressed binding steel in reinforcing and repairing available concrete structure. The method includes the reinforcing method of adhering initial tension high strength steel sheet for reinforcing and adhering no-tension high strength steel sheet onto the concrete structure with reinforced displacement to reinforce. The reinforcing structure and the steel sheet realize the integral operation via high strength screws and binding surface to transfer shearing force. The reinforced concrete structure has greatly raised bearing capacity, rigidity and structural anti-cracking property within the normal operation stage. The method can prolong the safe service life of concrete structure and reduce investment for re-constructing building.

Description

technical field [0001] The invention relates to a method for strengthening and repairing existing concrete structures. Background technique [0002] In various industrial and civil buildings, structures, bridges, culverts and tunnels and other engineering structures, concrete structures are the most widely used structures. Due to various reasons, such as the aging and damage of the concrete structure and the low original design standard, the strength (bearing capacity) and stiffness of the concrete structure cannot meet the normal use requirements. Reinforcing the existing concrete structure, improving its bearing capacity and prolonging its service life have become widely concerned engineering and technical issues. [0003] At present, among the commonly used concrete structure reinforcement methods, the bonded steel reinforcement method and the carbon fiber cloth reinforcement method are widely used. Although these two methods can effectively improve the ultimate bearing ...

Claims

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Application Information

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IPC IPC(8): E04G23/02
Inventor 刘凤奎赵志勇蔺鹏臻王亚军
Owner LANZHOU JIAOTONG UNIV
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