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Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam

A kind of technology of concrete column and concrete beam

Inactive Publication Date: 2014-07-16
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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  • Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam
  • Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam
  • Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The joint structure of the unbonded prestressed concrete beam circular steel tube concrete column 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 weld them on the beam stirrups in turn The b...

Embodiment 2

[0037] See when it is a side column node figure 2 , other measures are the same as in Example 1, except that the unbonded prestressed tendons are welded to 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 unbonded prestressed tendons are stretched .

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Abstract

The invention relates to a circular concrete-filled steel tubular column node of an unbonded pre-stressing connecting concrete beam, and belongs to the technical field of building structures. The circular concrete-filled steel tubular column node comprises a circular concrete-filled steel tubular column, a reinforced concrete beam, unbonded pre-stressing tendons, an annular plate and channel steel. The circular concrete-filled steel tubular column and the reinforced concrete beam are both formed in a cast-in-situ mode and connected through the unbonded pre-stressing tendons; a hole way is reserved in the connecting position of the circular concrete-filled steel tubular column and the reinforced concrete beam, and a metal corrugated pipe is embedded in the hole way; the annular plate is welded to the connecting position of the circular concrete-filled steel tubular column and the reinforced concrete beam, and a corresponding hole is formed in the annular plate; the channel steel is welded to a circular steel tube. By means of the circular concrete-filled steel tubular column node, the site welding technology is not needed, the reliability of node connection can be guaranteed, the node has the good shock resistance, the node connecting mode can be used for side column nodes in the structure and can also be used for middle column nodes, and the application prospect is wide.

Description

technical field [0001] The invention relates to a joint of an unbonded prestressed concrete beam circular steel pipe concrete column 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. Circular concrete filled steel tube has been valued by engineering circles because of its advantages of high bearing capacity, good plasticity and toughness, good economic effect and convenient construction. Circular concrete filled steel tubes can adapt to the needs of modern engineering structures to develop towards large spans, high towers, heavy loads and withstand harsh conditions, and meet the industrial requirements of modern construction technology, so they are being more and more widely used in single-story and multi-story industrial factory building columns , Equipment frame columns, trestle columns, piles, space structures, commercial plazas, multi-store...

Claims

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Application Information

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IPC IPC(8): E04B1/58
Inventor 李振宝陈艺博宋坤解咏平周宏宇
Owner BEIJING UNIV OF TECH
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