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Prestress reinforcing method for repairing expansion of box-type steel column wallboard

A technology of prestressing and section steel, which is applied in the field of building repair and reinforcement, can solve problems such as inability to pour high-strength grouting materials, inability to effectively transmit shear stress, and inability to meet the construction space, etc., to achieve good adaptability and fixation, saving manpower, material resources, and costs low effect

Active Publication Date: 2021-02-26
安徽寰宇建筑设计院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the box-shaped steel column wall plate expands, additional bending moments will be generated. The weld fracture between the wall plates cannot effectively transmit the shear stress, and the four wall plates of the box-shaped steel column cannot work together. If it is not handled in time, it will affect the structural safety.
[0004] The repair of damaged box-shaped steel columns in the prior art is mainly replacement, grouting reinforcement or adding cables, but the site where the box-shaped steel columns are located is often too small to meet the construction space required for replacement; due to the presence of partitions, it is impossible to pour high-strength grouting materials ; Cables need prestressed embedded space
When the existing technology cannot repair the damaged box-shaped steel columns in a timely and effective manner, how to repair and strengthen the existing damaged steel columns is an unsolved problem

Method used

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  • Prestress reinforcing method for repairing expansion of box-type steel column wallboard
  • Prestress reinforcing method for repairing expansion of box-type steel column wallboard
  • Prestress reinforcing method for repairing expansion of box-type steel column wallboard

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Cold storage for a micro-satellite technology industrial park project, with a building area of ​​9877.73m 2 , the height of the building is 23.6m, and the number of floors is one floor. The structure of the cold storage room is a steel structure, and the column grid size is 12×16m. Part of the water accumulated in the box-shaped steel column 10 during the construction period, and the water accumulated during the trial operation of the cold storage heaved and damaged the steel column. It was measured on site that five box-shaped steel column wall panels 30 bulged and swelled to varying degrees. Two of them were more severe, and the bulging caused the fillet welds of the box-shaped steel column wall panels 30 to break.

[0042] Taking one of the box-shaped steel columns 10 as an example, two wall fillet welds of the box-shaped steel column 10 were broken due to the bulging and expansion of the wall panels, and the cracks were located at the foot of the box-shaped steel co...

Embodiment 2

[0051] The difference from Embodiment 1 is that each piece of angle steel 21 of the reinforced angle steel fixture 40 in this embodiment 2 has a circular hole 42 in the middle of the part extending out of the box-shaped steel column wall panel 30, and the circular hole 42 of each layer of angle steel 21 The box-shaped steel columns 10 are in one-to-one correspondence and are fixed on the box-shaped steel column wall panels 30 by pressing through the bolts 23 . Since the box-shaped steel column wall plate 30 is bulging and reset, the angle steel 21 with the circular hole 42 can ensure the consistency of the reinforcement angle steel clamp 40 being fastened on the box-shaped steel column wall plate 30 .

Embodiment 3

[0053] The reinforcement method of the present invention is used to repair and strengthen the box-shaped steel column 10 of the cold storage. The upper and lower ends of the box-shaped steel column 10 are partially bulged and expanded but are not broken. The fixed angle steel clamps 20 are also equidistantly installed. The difference from Embodiment 1 is that In Example 3, where the fillet welds of the wall plates on both sides of the box-shaped steel column 10 are not broken, if the indicators such as the penetration depth of the weld meet the design requirements, then only the anchor plate 33 and the steel strand 32 need to be used for the swelling part of the drum. , The jack is tensioned and reset, and there is no need to eradicate the original weld and re-weld.

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Abstract

The invention relates to a prestress reinforcing method for repairing expansion of a box-type steel column wallboard. The method comprises the steps of installing fixing angle steel clamps, arranginga reset anchor plate, tensioning and resetting, welding and additionally arranging reinforcing angle steel clamps, wherein the anchor plate is connected between the two fixing angle steel clamps through a steel strand and an anchorage device, and the steel strand is tensioned and reset through the anchorage device by using a jack; and after resetting, a weld joint at the bulging fracture is re-welded, the reinforcing angle steel clamps are mounted on the outer side of a box-type steel column after the anchorage device, the anchor plate, the steel strand and the fixing angle steel clamps are dismounted. According to the method, the damaged part of the box-type steel pipe column is repaired through the angle steel clamps and anchorage device tensioning, so that the method is safe, simple, low in cost and wide in application range; and the repaired box-type steel column is reinforced through the reinforcing angle steel clamps, structural bearing capacity of a column body is further improved, and various use requirements can be met.

Description

technical field [0001] The invention belongs to the field of building repair and reinforcement methods, and in particular relates to a prestressed reinforcement method for repairing swelling of box-shaped steel column wall plates. [0002] technical background [0003] Box-shaped steel columns are the main vertical components in high-rise steel structure buildings. Partitions are often installed at the joints or at both ends of box-shaped steel columns. These partitions are not completely closed for exhaust. During the construction process, if waterproofing is not done Measures, so that there is water in the box-shaped steel column, low temperature in winter or in the cold storage site, the accumulated water will cause the wall of the box-shaped steel column to bulge, and some welds between the wall of the box-shaped steel column will break. After the box-shaped steel column wall panels bulge, additional bending moments will be generated. The weld fracture between the wall pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02
CPCE04G23/0218
Inventor 朱华欧国浩沈康王忠旺赵勇詹晓伟李亚文
Owner 安徽寰宇建筑设计院