Continuous variable-stiffness shear key type steel-concrete joint section

A technology of concrete bonding and shear keys, which is applied to structural elements, elongated structural members for load-bearing, building components, etc., can solve the problem of uneven load distribution of shear keys and achieve improved load distribution, The effect of reducing the load and increasing the bearing capacity

Inactive Publication Date: 2014-11-05
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0004] In order to overcome the shortcomings of the uneven load distribution state of the shear key in the existing steel-concrete joint section and improve the stress state of the steel-concrete joint section, the present invention provides an easy-to-implement, simple and reliable continuously variable stiffness shear force Bonded steel-concrete bonded section

Method used

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  • Continuous variable-stiffness shear key type steel-concrete joint section
  • Continuous variable-stiffness shear key type steel-concrete joint section
  • Continuous variable-stiffness shear key type steel-concrete joint section

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Embodiment Construction

[0025] In the following, the continuous variable stiffness shear key type steel-concrete joint section of the present invention will be further described with reference to the accompanying drawings.

[0026] like figure 1 As shown, the steel-concrete joint structure includes: steel beam 3, concrete beam 4, perforated steel plate 2 and ribbed through steel bar 1; The upper and lower surfaces of the lower flange; the web of the steel beam 3 is provided with a circular hole corresponding to the perforated steel plate 2; the ribbed through steel bar 1 passes through the center of the circular hole on the perforated steel plate 2 and the web of the steel beam 3; The concrete beam 4 is poured on the periphery of the steel beam 3 and wraps the perforated steel plate and the ribbed through steel bar. The shear force between the steel beam and the concrete beam is resisted by the concrete tenon and ribbed penetration reinforcement in the circular hole of the perforated steel plate.

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Abstract

The invention belongs to the technical field of civil engineering and particularly relates to a steel-concrete joint section used for steel-concrete composite structures. The continuous variable-stiffness shear key type steel-concrete joint section comprises a steel beam, a concrete beam, perforated steel plates and through reinforcing steel bars with ribs, the perforated steel plates are welded on the surfaces of the flanges of the steel beam, round holes corresponding to the perforated steel plates are arranged on a web plate, the through reinforcing steel bars with the ribs penetrate through the round hole centers on the perforated steel plates and the web plate of the steel beam, and the concrete beam is poured on the periphery of the steel beam and wraps the perforated steel plates and the through reinforcing steel bars with the ribs. The load distribution state of shear keys in the steel-concrete joint section and the stress distribution state of the steel-concrete joint section are improved, security coefficient of the steel-concrete joint section can be increased, and the steel-concrete joint section is convenient to construct and high in construction efficiency and does not need complex construction equipment.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a steel-concrete joint section used in a steel-concrete composite structure. Background technique [0002] The steel-concrete junction is the key structure connecting the steel beam and the concrete beam. In the steel-concrete joint section, a shear connector needs to be set to transmit shear force to ensure that the steel beam and the concrete beam are jointly stressed. The PBL shear key is a commonly used shear connector, usually in the steel-concrete joint. The segments are arranged along the beam axis. Under the action of the axial load, due to the axial deformation of the steel beam and the concrete beam itself, the axial load is mainly borne by the 3-5 rows of shear keys at the end of the steel-concrete joint section, and the load distribution of the shear keys presents two The end is large and the middle is small, and the stress distribution of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/58E04B1/41E04C3/293E04G21/00E01D19/00E01D21/00
Inventor 肖林李小珍卫星强士中吴金峰张景峰肖军晋智斌刘德军朱艳张迅宋立中
Owner SOUTHWEST JIAOTONG UNIV
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