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Prefabricated frame bracket-free long column and construction method thereof

A construction method and prefabricated technology, applied in the field of frame columns, can solve the problems of complex structure, low comprehensive cost and high comprehensive cost of prefabricated reinforced concrete frame joints, and achieve reliable construction quality, small steel consumption and high shear bearing capacity Improved effect

Active Publication Date: 2014-01-22
CHINA AVIATION PLANNING & DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides an assembled frame without corbel-leg long column and its construction method, which not only solves the technical problems of complex joint structure and difficult installation of the existing assembled reinforced concrete frame, but also greatly improves the axial pressure bearing capacity of the existing prefabricated column force and shear bearing capacity to solve the technical problem of poor seismic performance of the existing prefabricated reinforced concrete frame; also to make it fast in construction and low in comprehensive cost to solve the high comprehensive cost of the existing prefabricated reinforced concrete frame column and the promotion Difficult technical issues

Method used

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  • Prefabricated frame bracket-free long column and construction method thereof
  • Prefabricated frame bracket-free long column and construction method thereof
  • Prefabricated frame bracket-free long column and construction method thereof

Examples

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Effect test

Embodiment 1

[0047] Embodiment one, see Figure 1-4 As shown, this prefabricated frame has no corbels and long columns, including more than two storey columns 1 and more than two beam-column nodes 2;

[0048] The steel pipes 1.2 at the interstory columns 1 and beam-column joints 2 of the long column, the first pre-cast steel pipe inner concrete 1.3 and the column longitudinal steel bars 1.4 bound outside the steel pipes are integrally penetrated, and the longitudinal steel bars 1.4 are horizontally There are column stirrups 1.5 tied at intervals;

[0049] The long column is pre-cast with steel pipe outer concrete for the second time in the range of each interlayer column 1, and the steel pipe outer concrete is combined with column longitudinal reinforcement 1.4 and column stirrup 1.5 to form steel pipe outer reinforced concrete 1.1, and the interlayer column 1 is made of A laminated column composed of reinforced concrete 1.1 outside the steel pipe, 1.2 steel pipe, and 1.3 inner concrete p...

Embodiment 2

[0098] Embodiment two, see Figure 5 As shown, the cross section of the steel pipe 1.2 is circular, the cross section of the reinforced concrete 1.1 outside the steel pipe is circular, and the rest are the same as in the first embodiment.

Embodiment 3

[0099] Embodiment three, see Image 6 As shown, the cross section of the steel pipe 1.2 is square, the cross section of the reinforced concrete 1.1 outside the steel pipe is square, and the rest are the same as in the first embodiment. Steel pipe 1.2 is rectangular or square, although the restraint effect is reduced, but the rectangular or square cross-section covers a larger area than the circular one, thus containing more high-strength concrete, which is also very effective for improving the bearing capacity of long columns.

[0100] The side length of the steel pipe 1.2 is 150-500 mm.

[0101] Calculation example 4. A steel pipe concrete composite column with side length 500x500, rectangular steel pipe □D300x7, using Q345, C80 concrete inside the pipe, C40 concrete outside the pipe; longitudinal reinforcement 12D20, steel reinforcement HRB400. The square or rectangular steel pipe does not count the effect of increasing the strength of the concrete restraint in the pipe.

...

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Abstract

The invention provides a prefabricated frame bracket-free long column and a construction method thereof. A column body comprises more than two layers of interlayer columns and more than two beam column nodes, and the long column penetrates through steel tubes of each interlayer column and the beam column nodes, steel tube internal concrete undergoing primary pouring in advance and column longitudinal steel ribs bound on the outer sides of the steel tubes. Steel tube external concrete is poured for the second time in advance in the range of each interlayer column of the long column. The column and the method have the advantages that a plurality of frame columns are manufactured into one long column, manufacturing is simple and installation is convenient to achieve; a column body is a stacked column, compression strength and shear strength are twice to four times those of a steel rib concrete column with the same section area, and bearing force and anti-shock performance of the frame columns are remarkably improved; gaps are reserved between outer tube steel tube concrete and the beam column nodes, and connection between the outer tube steel tube concrete and steel rib concrete beams is convenient to achieve; inner high-strength steel tube concrete is prefabricated in a factory, and manufacturing cost is greatly reduced. The prefabricated frame bracket-free long column and the construction method are suitable for various high-rise prefabricated buildings, and are wide in market prospect.

Description

technical field [0001] The invention relates to a frame column in an assembled building, in particular to a long column used in a multi-story assembled frame structure and a construction method thereof. Background technique [0002] Frame structure, frame-shear wall structure and frame-tube structure have flexible room layout and are widely used structural forms in modern buildings. Among them, frame columns play a very important role in various buildings. The prefabricated structure is produced intensively in the factory, which is a low-carbon and environmentally friendly structural form, and is the development trend of modern architecture. Prefabricated frame structures currently mainly include steel structures and prefabricated reinforced concrete structures. Steel structures have light weight and good ductility, but they are expensive and have poor fire resistance. The prefabricated reinforced concrete frame structure is low in cost, durable and good in fire resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/34E04G21/00
Inventor 邹剑强付佳宏
Owner CHINA AVIATION PLANNING & DESIGN INST GRP
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