Composite joints of circular concrete-filled steel tube columns in concrete beams connected by prestressed and ordinary steel bars

A technology of reinforced concrete beams and ordinary steel bars, which is applied in the direction of architecture and building construction, can solve problems such as unclear node calculation models, difficult construction, unclear force transmission, etc., and achieve fast construction speed, improved performance, and high application prospects broad effect

Inactive Publication Date: 2017-02-01
BEIJING UNIV OF TECH
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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, most of which are complex in structure, difficult in construction, unclear in force transmission, and unclear in joint calculation models. Up to now, there is no relatively complete set of joint calculation theory and design methods in our country.

Method used

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  • Composite joints of circular concrete-filled steel tube columns in concrete beams connected by prestressed and ordinary steel bars
  • Composite joints of circular concrete-filled steel tube columns in concrete beams connected by prestressed and ordinary steel bars
  • Composite joints of circular concrete-filled steel tube columns in concrete beams connected by prestressed and ordinary steel bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The composite joint structure of prestressed and ordinary steel bars connecting concrete beams with circular concrete-filled steel tube columns is as follows: figure 1 Shown:

[0024] 1. Positioning of circular steel tube concrete

[0025] The steel pipes of the steel tube concrete columns (1) are drilled in strict accordance with the drawings in the steel structure processing plant; the ring plates (5) and channel steel (6) are welded by surrounding welding at the connecting beams of the circular steel tube concrete columns (1) ; The hoisting and positioning of the steel tube concrete column (1).

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

[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...

Embodiment 2

[0039] See when it is a side column node figure 2 , other measures are the same as in embodiment 1, except that the prestressed tendon is welded on the ring plate (5) at the end of the side column, and this ring plate can be used as a pressure bearing plate when the prestressed tendon is stretched.

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PUM

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Abstract

The invention discloses a prestressed concrete beam and circular steel pipe concrete column combined joint connected with regular rebars and belongs to the technical field of building structures. A steel pipe concrete column and a reinforced concrete beam are cast in situ and are connected with the regular rebars through prestressed tendons, a runner is reserved at the connected position of the circular steel pipe concrete column and the reinforced concrete beam, metal bellows are buried in the runner, the prestressed tendons are inserted into the metal bellows and then grouted, a ring plate is welded at the connected position of the circular steel pipe concrete column and the concrete beam and provided with corresponding holes, and the groove steel is welded on a circular steel pipe. The prestressed concrete beam and circular steel pipe concrete column combined joint is fast in construction and wide in application prospect, and shear resistance of the combined joint is effectively improved, and connecting performance of the same is improved.

Description

technical field [0001] The invention relates to a composite joint of a circular steel pipe concrete column of a concrete beam connected by 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 frame columns, trest...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/58
Inventor 马华王倩倩解咏平宋坤李振宝
Owner BEIJING UNIV OF TECH
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