Prefabricated prestressed high performance concrete composite beam and its construction method based on dry connection

A technology of high-performance concrete and prefabricated concrete, which is applied to the direction of long-strip structural members, girders, joists, etc. used for load-bearing, and can solve the problem that it is difficult to apply concrete completely and accurately for prestress, it is difficult to ensure prestress, and the construction process is complicated, etc. problems, to achieve the effect of saving materials, good maintenance, and enhancing the overall performance

Active Publication Date: 2022-06-24
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] In the research process of prestressed steel-concrete composite beams, it is difficult to ensure that all the prestress is accurately applied to the concrete of the lower flange, and the steel and the concrete of the upper flange will always bear part of the prestress
Simply separating the concrete and the section steel, and applying prestress to the lower concrete flange on one side will not only cause the concrete of the compression flange to bear part of the prestress, but also the prestressed concrete will be under tension due to the large bias before it is assembled. Cracks appear on one side or even the whole component becomes unstable and damaged
Therefore, a simple and effective prestressed steel-concrete composite beam is needed to solve the problem that the prestress is difficult to be completely and accurately applied to the concrete on the tension side
In addition, the construction process of traditional steel-concrete composite beams is complicated, and wet work is unavoidable in many processes, and the construction period is long. The prefabricated dry connection can greatly shorten the construction period and save costs.

Method used

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  • Prefabricated prestressed high performance concrete composite beam and its construction method based on dry connection
  • Prefabricated prestressed high performance concrete composite beam and its construction method based on dry connection
  • Prefabricated prestressed high performance concrete composite beam and its construction method based on dry connection

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Embodiment Construction

[0042] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0043] like figure 1 As shown, the present invention is a prefabricated prestressed high performance concrete composite beam based on dry connection, comprising:

[0044] The I-beam 3 has several round holes 10 pierced through its web along the length direction, such as figure 2 As shown, from the upper flange to the lower flange, the circular holes 10 may be arranged in one row, and may also be arranged in multiple rows.

[0045] The split concrete strips are arranged on both sides of the web of the I-beam 3 and between the upper and lower flanges, and are provided with through holes, which are coaxial with the circular holes 10 . Wherein, the via hole on at least one side is a gradually widening hole, and the gradually widening hole means that the diameter of the via hole increases linearly along the direction from the web to the ou...

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Abstract

A prefabricated prestressed high-performance concrete composite beam based on dry connection, including: I-beam, with a number of round holes pierced on its web along the length direction; split concrete strips, arranged on the web of I-beam On both sides of the plate, and between the upper and lower flanges, there are through holes coaxial with the round hole, wherein at least one side of the through hole is a gradually widening hole, and the gradually widening hole refers to its aperture along the The web increases linearly toward the outside; the prefabricated concrete connecting piece is consistent with the shape of the gradually widening hole, and is at least filled in the gradually widening hole on one side, and is provided with the same The reserved hole of the shaft; the bolt connector is set in the reserved hole and the round hole, and the I-beam, the split concrete strip and the prefabricated concrete connector are connected into one; the prestressed tendon is arranged in the split Concrete strip, and consistent with the length direction of the I-beam. The invention completely adopts dry connection, and all the components are prefabricated, which greatly improves the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a prefabricated prestressed high-performance concrete composite beam based on dry connection and a construction method. Background technique [0002] In the research process of prestressed steel-concrete composite beam, it is difficult to ensure that all the prestress is applied to the concrete of the lower flange accurately, and the section steel and the concrete of the upper flange always bear part of the prestress. Simply separating the concrete and the profiled steel and applying prestress to the lower flange of the concrete on one side will not only cause the concrete of the compression flange to bear part of the prestress, but also cause the prestressed concrete to be under tension due to large bias before it is assembled. Cracks occur on one side or even the entire component is unstable and damaged. Therefore, a simple and effective prestressed steel-conc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/293E04C3/26E04G21/12
CPCE04C3/293E04C3/26E04G21/12
Inventor 于云龙贺九州杨勇薛亦聪冯世强黄慧萍刘永涛李彬彬马磊
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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