Method for reinforcing structure by means of method of externally attaching steel-reinforced concrete framework

A steel-reinforced concrete and reinforced structure technology, which is applied in building construction, building maintenance, construction, etc., can solve the problems of lack of connection between old and new concrete, increase the seismic performance of the structure, and fail to form a whole, so as to increase the stiffness and improve the bearing capacity ability to reduce the effect of developing

Inactive Publication Date: 2014-04-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The existing structure and the external steel-reinforced concrete frame are connected by prestressed tendons, or the existing structure and the external steel-reinforced concrete frame are connected by planting reinforcement anchorage, so that the structure becomes a whole, which not only increases the seismic performance of the structure, but also reduces the The damage of the structure can also solve the problem of the lack of connection between the old and new concrete and the failure to form a whole, as well as the lag of stress and strain

Method used

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  • Method for reinforcing structure by means of method of externally attaching steel-reinforced concrete framework
  • Method for reinforcing structure by means of method of externally attaching steel-reinforced concrete framework
  • Method for reinforcing structure by means of method of externally attaching steel-reinforced concrete framework

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Experimental program
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Effect test

Embodiment 1

[0028] The newly added steel-reinforced concrete frame is a specific construction method in which the prefabricated monolithic frame is connected to the original frame structure through prestressed tendons:

[0029] In this embodiment, taking the beam as an example, the size of the original frame beam is 150mmX300mm, the strength grade of the concrete used is C35, the strength grade of the steel bar is HRB335, the size of the external prefabricated beam is 100mmX300mm, the strength grade of the concrete used is C40, and the strength grade of the steel bar is C40. It is HRB400, the prestressed tendons are 1X7 with a diameter of 12.7 and a strength of f ptk =1860N / mm 2 , f py =1320N / mm 2 , the steel frame is made of Q345 steel, and the size of the H-shaped steel in the beam is 150X60X8X6. According to the analysis results of the model, it is shown that Figure 4 , Compared with the unreinforced, the bearing capacity is increased by nearly 50%.

[0030] a. Design and manufac...

Embodiment 2

[0035] The specific construction method for the connection between the newly added steel reinforced concrete frame and the original frame through planting reinforcement anchorage:

[0036] a. Design and manufacture

[0037] According to the section size of the original reinforced concrete frame, design the newly added reinforced concrete frame section. Select the type of glue for planting bars 14 and the diameter of the anchoring steel bar 15, the depth of planting bars, the distance between bars for planting, and the diameter of the drilled hole. Drill holes in the section of the original reinforced concrete frame according to the bar planting parameters, implant the bar planting glue 14, and insert the anchor bar 15. After the reinforcement glue 14 is completely dry and hard, proceed to the next step.

[0038] c. Rebar binding

[0039] Carry out the reinforcement binding of the newly added reinforced concrete frame, 5, 10, 6, and 11 are respectively the longitudinal reinf...

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Abstract

The invention discloses a method for reinforcing a structure by means of the method of externally attaching a steel-reinforced concrete framework, and belongs to the field of concrete structure reinforcing. The steel-reinforced concrete framework is externally attached to the outer side of an existing reinforced concrete framework structure. A newly-added reinforced concrete beam and column are prefabricated in a whole-casting integrated mode and are connected with an existing reinforced concrete beam and column respectively in a post-tensioning method anchoring prestressed tendon mode. Steel ribs in the newly-added reinforced concrete beam and column are connected together through bolts and angle iron. A gap with the width of 5-10mm is reserved between the newly-added steel-reinforced concrete framework and the existing reinforced concrete framework structure and is sealed by mortar. Ducts need to be reserved in the newly-added reinforced concrete beam and column and the steel ribs in the newly-added steel-reinforced concrete beam and column, so that prestressed tendons penetrate through the steel ribs conveniently. Unbounded prestressed tendons are anchored through an anchorage device. According to the method, the bearing capacity, rigidity, ductility and the like of the structure can be effectively improved, a worker does not need to enter a house in the construction process without removal, the efficient, economical and practical effects can be achieved, and the reinforcing effect is facilitated.

Description

technical field [0001] The invention belongs to the field of concrete structure reinforcement, and in particular relates to a reinforced structure with a steel-reinforced concrete frame method. Background technique [0002] Reinforced concrete frame structures and bottom frame structures have been widely used in multi-story buildings due to their flexibility in spatial arrangement. Due to the different functions of the bottom frame structure, the structural layout is different, and it is easy to form a structural system with uneven rigidity and rigid top and soft bottom. There may be a serious lack of earthquake resistance, and tilting or collapse will occur during an earthquake, which will cause great obstacles and economic costs to structural repair and disaster relief. [0003] my country's "Code for Design of Reinforcement of Concrete Structures" (GB50367-2006) proposes a variety of reinforcement methods. For example, the method of enlarging the cross-section, the meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02
Inventor 马华付静解咏平张婷婷李振宝
Owner BEIJING UNIV OF TECH
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