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Unbonded prestressed joints of precast concrete beams with square rectangular concrete filled steel tube columns

A technology of concrete-filled steel tubular columns and precast concrete, which is applied in the direction of construction and building structure to achieve the effect of ensuring reliability, good fatigue resistance and fast construction speed

Active Publication Date: 2017-05-03
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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  • Unbonded prestressed joints of precast concrete beams with square rectangular concrete filled steel tube columns
  • Unbonded prestressed joints of precast concrete beams with square rectangular concrete filled steel tube columns
  • Unbonded prestressed joints of precast concrete beams with square rectangular concrete filled steel tube columns

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The joint structure of prestressed concrete beam square rectangular concrete filled steel tube column is as follows: figure 1 Shown:

[0024] 1. Manufacture of square and rectangular steel pipe concrete and reinforced concrete beams

[0025] Square rectangular concrete-filled steel tube columns (1) and reinforced concrete beams (2) are manufactured in the factory in strict accordance with relevant specifications and drawings. Four corresponding channels are reserved during prefabrication. The corrugated pipe (4) is welded to the ring plate (5) and the channel steel (6) at the interface of the connecting beam on the square rectangular concrete filled steel pipe column (1) by means of surrounding welding.

[0026] 2. Assembly of beam-column joints

[0027] After the square-rectangular concrete-filled steel tube column (1) is positioned, the reinforced concrete beam (2) is hoisted and positioned through support.

[0028] 3. Tensile prestressed tendons

[0029] Wear the...

Embodiment 2

[0033] 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 provides a node for connecting a prefabricated concrete beam with a rectangular steel tube concrete column through unbonded prestressed ribs, and belongs to the technical field of building structures. The node comprises the rectangular steel tube concrete column, the reinforced concrete beam, the unbonded prestressed ribs, a steel plate and channel steel. The rectangular steel tube concrete column and the reinforced concrete beam are prefabricated; the positions, corresponding to a section of the reinforced concrete beam, of the prefabricated reinforced concrete beam and of the rectangular steel tube concrete column are provided with hole channels; metal corrugated tubes are pre-buried in the hole channels; the section of the portion, connected with the reinforced concrete beam, of the rectangular steel tube concrete column is provided with the steel plate in a welded mode; the channel steel is welded to a rectangular steel tube; the unbonded prestressed ribs penetrate through the metal corrugated tubes and are tensioned so that the beam and the column can be connected into a whole. The construction speed is high, the onsite welding process is needless, reliability of node connection can be guaranteed, good anti-seismic performance is achieved, the node connection mode can be used for a side column node in a structure and can also be used for a middle column node and application prospects are wide.

Description

technical field [0001] The invention relates to an unbonded prestressed connection prefabricated concrete beam square rectangular steel pipe concrete column node, belonging 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, trestle columns, p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/58
Inventor 李振宝王文静宋坤解咏平马华
Owner 北京中联浩科技服务有限公司
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