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Method for reinforcing space nodes of beam column built from concrete

A space node and concrete technology, which is applied in construction, building maintenance, building construction, etc., can solve problems such as difficulty in ensuring concrete compactness, difficulty in pouring concrete, troublesome construction, etc., and achieves cheap technology, simple and convenient construction, and small amount of on-site work Effect

Inactive Publication Date: 2007-07-25
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method requires the formwork to be erected on site to pour the concrete
Since the beam-column joint axillary corner is blocked by the beam-column, it is difficult to pour concrete, and it is difficult to ensure the compactness of the concrete, and the concrete needs to be cured for 28 days to reach the design strength
Therefore, this method is troublesome in construction and has a long construction period.

Method used

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  • Method for reinforcing space nodes of beam column built from concrete
  • Method for reinforcing space nodes of beam column built from concrete
  • Method for reinforcing space nodes of beam column built from concrete

Examples

Experimental program
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example 1

[0031] This embodiment is a node reinforcement method in which a column is orthogonal to four beams.

[0032] Referring to Fig. 1, four triangular steel haunches 5 are made earlier before construction. This triangular steel haunch 5 is mainly made up of a vertical haunch plate 5-1, a horizontal haunch plate 5-2 and two oblique bars 5-3. Both the vertical armpit plate 5-1 and the horizontal armpit plate 5-2 are 6mm thick steel plates, and the diagonal braces 5-3 are 45×5 equilateral angle steels. Among them, the vertical armpit plate 5-1 and the horizontal armpit plate 5-2 are welded vertically, and the two diagonal braces 5-3 are arranged in the right angle formed by the vertical armpit plate 5-1 and the horizontal armpit plate 5-2. The angle steel 5-4 is welded on the vertical axillary plate 5-1 and the horizontal axillary plate 5-2. The entire triangular steel armpit 5 is selected from A3 steel with good weldability. The width of the vertical haunch plate 5-1 and the hori...

example 2

[0041] This embodiment is a node reinforcement method in which a column is orthogonal to three beams.

[0042] Make 3 triangular steel haunches 5 before construction, and the specific manufacturing method is the same as Example 1. After prefabricating the triangular steel haunch 5, construct according to the following steps.

[0043] a. Grinding nodes. Grind away the mortar layer on the surface of beams 2 and 3 and column 1 around the nodes, and round the edges of beams 2 and 3 and column 1, then blow off the floating ash with high-pressure gas, and then clean it with acetone. The length of the area to be sanded is the same as in Example 1.

[0044] b. First, level the concrete surface polished and cleaned in step a with Swiss Araldite XH130 leveling glue, and then evenly apply a thin layer of Swiss Araldite XH7307 primer; after the primer is dry, proceed to the next step.

[0045] c. Use Swiss Araldite XH180 adhesive glue to vertically paste two layers of vertical carbon f...

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Abstract

The present invention discloses a method for strengthening concrete beam-column space node. Said method includes the following steps: firstly grinding peripheral surface of concrete beam-column node, cleaning, leveling by using leveling glue and applying base glue, then vertically sticking two layers of vertical carbon fiber fabric to the internal columns of two sides of beam, utilizing carbon fiber fabric to bind triangular steel clips onto the column and beam and binding two heads of said vertical carbon fiber fabric onto the column. Said strengthening method can greatly raise yield strength, limit strength and rigidity of node.

Description

technical field [0001] The invention relates to a connection method for building structures, in particular to a connection method for strip-shaped building components, and in particular to a method for reinforcing concrete beam-column joints with outsourcing carbon fiber cloth. Background technique [0002] The development of my country's engineering construction has gradually entered the climax of maintenance and reinforcement from the climax of new construction. Many housing structures built around the 1980s have problems such as insufficient earthquake resistance, and urgently need reinforcement and maintenance. [0003] The most important part of the frame structure is the node. Under the action of horizontal load, the horizontal shear force in the core area of ​​the frame joint is about 4 to 6 times of the column shear force. The building seismic design codes of various countries require frame structures to have "strong nodes and weak members". In previous major earth...

Claims

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Application Information

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IPC IPC(8): E04G23/02E04B1/19E04B1/21E04B1/58
Inventor 冼巧玲
Owner GUANGZHOU UNIVERSITY
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