Repairing and strengthening method for existing reinforced concrete beam-column joints
A technology of reinforced concrete and beam-column joints, which is applied in building maintenance, construction, building construction, etc., and can solve the problems of inability to deform and position restoration of concrete beam-column joints, heavy weight, and inability to greatly improve the overall strength of structures or components.
Inactive Publication Date: 2012-07-18
陕西建固工程科技有限公司
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Problems solved by technology
The outsourcing steel method is mainly used in the case of relatively light damage to the concrete column, that is, the concrete column does not appear to be deformed, and the outsourcing steel method mainly repairs the damage of the corners of the beam and column, and is not suitable for the situation where the concrete beam-column joints are damaged. It is not possible to restore the deformation and position of the concrete beam-column joints; the epoxy glue sealing method is mainly suitable for the situation where the fire protection level is high, and the weight of the epoxy glue is easy to cause secondary damage to the repaired concrete columns. Repair the deformation of concrete beams and columns; the method of pasting carbon fiber cloth is suitable for ordinary small load structures or components, and the use of carbon fiber cloth can not greatly improve the overall strength of structures or components
[0003] In summary, it can be seen that when there is a large dog hole at the connection between the top of the reinforced concrete column and the frame beam, there is deformation and displacement at the top of the concrete column, and there are many cracks in the beams and columns, the above methods cannot be completely corrected. fixed
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[0027] The following is one of the examples given by the inventor. An existing building in Baoji City has a concrete frame column section size of 600*600mm, a concrete column height of 9000mm, and a concrete column strength of C40. The steel bars are too dense, and a large test dog hole is formed during the pouring of concrete. After the load is applied to the upper part of the concrete column, the node area is damaged, and the column top is offset to the east by about 60mm from the axis, and appears within the column height of the concrete column. There are many horizontal cracks, the crack width is about 0.2-0.3mm, and cracks of different degrees also appear in the lower part of the beam.
[0028] For the existing problems of the above-mentioned existing buildings, follow the technical scheme of the present invention, and follow the steps below to repair and reinforce the concrete frame beams and column nodes of the existing buildings,
[0029] Step 1: Build the operation pl...
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The invention discloses a repairing and strengthening method for existing reinforced concrete beam-column joints. The method includes steps of building up a platform around a repaired concrete frame column, reasonably constructing the steel tube scaffold of the platform, allowing the platform to be able to break down the stress load of the concrete beam-column joints, using a jacking support to support the beam above the concrete frame column, using an underpinning jack to jack and restore the beam bottom, when the beam reaches a required height, stretching the deformed top of the concrete frame column in the opposite direction to restore an original shape, repairing and solidly filling each hole on the concrete frame column and the beam-column joints, and pasting carbon fiber to reinforce and repair the cracks of the frame beam and frame column until all the flaws of the frame beam and frame column are repaired.
Description
technical field [0001] The invention belongs to the field of reinforcing and transforming existing buildings in civil engineering, and in particular relates to a method for repairing and reinforcing existing reinforced concrete beam-column joints. Background technique [0002] The traditional repair methods of beams and columns of reinforced concrete structures mainly include: outsourcing steel, sealing with epoxy glue, pasting carbon fiber cloth and other methods. The outsourcing steel method is mainly used in the case of relatively light damage to the concrete column, that is, the concrete column does not appear to be deformed, and the outsourcing steel method mainly repairs the damage of the corners of the beam and column, and is not suitable for the situation where the concrete beam-column joints are damaged. It is not possible to restore the deformation and position of the concrete beam-column joints; the epoxy glue sealing method is mainly suitable for the situation wh...
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IPC IPC(8): E04G23/02
Inventor 曾凡奎胡长明周明周雪峰
Owner 陕西建固工程科技有限公司
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