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Concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and common reinforcement for connection

A technology of concrete-filled steel tube columns and ordinary steel bars, which is applied in the direction of construction and building construction, to achieve the effects of small prestress loss, increased shear bearing capacity, and guaranteed reliability

Active Publication Date: 2014-07-16
北京中联浩科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many forms of existing CFST joints, and the difficulties in construction and design of joints often become the bottleneck factor restricting the popularization and application of new and excellent structures

Method used

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  • Concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and common reinforcement for connection
  • Concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and common reinforcement for connection
  • Concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and common reinforcement for connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The composite joint structure of square and rectangular concrete-filled steel tube columns of concrete beams connected by unbonded prestress and ordinary steel bars is as follows: figure 1 Shown:

[0024] 1. Positioning of square and rectangular concrete filled steel pipes

[0025] The steel pipes of the square and rectangular concrete-filled steel pipe columns (1) are drilled in strict accordance with the drawings in the steel structure processing plant; the steel plates (5) and channel steel ( 6); hoisting and positioning of square and rectangular concrete filled steel tube columns (1).

[0026] 2. Binding beam reinforcement skeleton and prestressed reinforcement

[0027] Support the beam bottom formwork, bind the beam steel skeleton strictly according to the design drawings; support one side of the side formwork, draw the metal bellows positioning line on the side formwork according to the position of the prestressed tendons given in the drawing, and weld them on t...

Embodiment 2

[0037] See when it is a side column node figure 2 , other measures are the same as embodiment 1, except that at the end of the side column, the unbonded prestressed tendon is welded on the steel plate (5), and this ring plate can be used as a pressure bearing plate when the unbonded prestressed tendon is stretched.

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Abstract

The invention relates to a concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestress and common reinforcement for connection and belongs to the technical field of building structures. The concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestress and common reinforcement for connection comprises a square-rectangular concrete-filled steel tube column, a reinforced concrete beam, unbonded prestressed bars, steel plates, and steel channels. Both the square-rectangular concrete-filled steel tube column and the reinforced concrete beam are both cast in place. The connection sections of the square-rectangular concrete-filled steel tube column and the reinforced concrete beam is provided with ducts in which metal bellows are embedded; the steel plates are welded at the connection sections of the square-rectangular concrete-filled steel tube column and the reinforced concrete beam and are provided with corresponding holes; the steel channels are welded on the square-rectangular concrete-filled steel tube column. The concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestress and common reinforcement for connection has the advantages that construction speed is high, the field welding process is not required, joint connection reliability can be guaranteed, seismic performance is good, a connection way of the joint is applicable to side column joints in structures and also applicable to middle column joints, and the joint has promising application prospect.

Description

technical field [0001] The invention relates to a combined node of a square rectangular steel pipe concrete column of a concrete beam connected by unbonded prestress and ordinary steel bars, and belongs to the technical field of building structures. Background technique [0002] Concrete filled steel tubes have been used in construction projects for more than 100 years. Concrete filled steel tubes are valued by engineering circles because of their high bearing capacity, good plasticity and toughness, good economic effect and convenient construction. Concrete-filled steel tubes can adapt to the needs of modern engineering structures to develop toward large spans, high towers, heavy loads and withstand harsh conditions, and meet the industrial requirements of modern construction technology. Therefore, they are being more and more widely used in single-story and multi-story industrial factory buildings Good economic and architectural effects have been achieved in equipment fra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/58
Inventor 李振宝汪瓅帆解咏平宋坤周宏宇
Owner 北京中联浩科技服务有限公司
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