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Stud anti-shearing connecting piece for constraining concrete splitting and splitting development

A technology for shear-resistant connectors and confining concrete, which is applied in the direction of load-bearing elongated structural components, building components, structural elements, etc., can solve the problems that the advantages of steel and concrete materials cannot be fully utilized, and the widespread application and application are restricted. , to achieve the effect of increasing the effective load, increasing the longitudinal shear bearing capacity, and increasing the bearing capacity

Active Publication Date: 2016-11-09
曹华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the limit state of normal use, the traditional cylindrical head stud shear connectors of steel-concrete composite beams are not improved, and the respective advantages of steel and concrete materials cannot be fully utilized, which restricts the strength of steel-concrete composite beams and other composite structures or mixed structures. Wide application in the structure

Method used

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  • Stud anti-shearing connecting piece for constraining concrete splitting and splitting development
  • Stud anti-shearing connecting piece for constraining concrete splitting and splitting development
  • Stud anti-shearing connecting piece for constraining concrete splitting and splitting development

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Effect test

Embodiment 1

[0033] see Figure 1 to Figure 6 Embodiment 1 of the stud shear connector for constraining concrete splitting and splitting development. In this embodiment, the stud shear connector is made with the stud 3 as the connection basis, and the stud 3 is used in the market 16mm cylindrical head studs are sold, and the root of the welding end of the stud 3 is fitted with a plastic-molded ring-shaped inner tire film 11 with a size structure of 3.5mmx10mm, and a welding auxiliary ring with an inner diameter of 23mm and a thickness of 1mm is also set on the outside of the annular inner tire membrane 11 10, and the stud welding arc point 8 is exposed to the reserved hole in the center of the bottom of the mold. The high-strength fine stone concrete mold 9 with an inner diameter of 48mm is concentrically set on the outside of the stud 3, and the structure is shown as figure 2 As shown, the high-strength fine-stone concrete 5 of C50-C80 is poured in the high-strength fine-stone concrete ...

Embodiment 2

[0040] Figure 7 ~ Figure 13 It is the second embodiment of the present invention. In this embodiment, the stud 3 is a high-strength steel stud with a material performance grade of 10.8. The stud 3 is connected by a pressure-bearing high-strength bolt connection technology, and the stud 3 The cooperating high-strength bolts 19, supporting nuts 20, and connecting threaded surfaces 21 should meet the corresponding requirements of the relevant specifications. Since the stud 3 in the second embodiment uses a 10.8-grade high-strength steel bolt with a diameter of 16mm The nail cooperates with the supporting nut 20 to make a fixed connection with the steel beam flange 1, so this structure puts forward higher requirements for the longitudinal shear of the reinforced concrete flange 2 by the shear connector. The concrete splits within the 3D core range around the stud, which can be used for figure 1 The high-strength fine stone concrete 5 within 48 mm of the core area in the middle a...

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Abstract

The invention discloses a stud anti-shearing connecting piece for constraining concrete splitting and splitting development. The stud anti-shearing connecting piece comprises a stud for connecting a steel beam flange with a reinforced concrete flange; the stud is fixedly connected with the steel beam flange in bolting and welding modes; a circle of high-strength fine stone concrete is fixedly formed on the periphery of the stud; the strength of the high-strength fine stone concrete is larger than that of concrete poured on the reinforced concrete flange; on the periphery of the high-strength fine stone concrete, one-time surrounding tensile force is applied to the high-strength fine stone concrete and assemblies inside the high-strength fine stone concrete through an anti-tension unit surrounding the high-strength fine stone concrete; and meanwhile, a spiral rib is further arranged on the outer side of the anti-tension unit of the high-strength fine stone concrete, concentrically surrounds the outer side of the high-strength fine stone concrete and is formed in the reinforced concrete flange in a pouring mode. According to the stud anti-shearing connecting piece for constraining concrete splitting and splitting development, the longitudinal shear-bearing capacity of the stud anti-shearing connecting piece can be improved, and the effective load of the stud anti-shearing connecting piece in a steel-concrete combination beam under a serviceability limit state is increased, so that obstacles of the steel-concrete combination beam in the design and application status are overcome.

Description

technical field [0001] The invention relates to a basic cylindrical head stud shear connector widely used in steel-concrete composite beams in the technical field of construction, in particular to a stud shear connector for restraining concrete splitting and splitting development. Background technique [0002] In chapter 11.3 of the current "Code for Design of Steel Structures" (GB 50017-2003), the formula for the shear bearing capacity of cylindrical head welded stud (stud) connectors in the prior art is given: namely This formula is based on the theoretical and experimental research of stud material performance grade 4.6 steel and stud directly embedded in the cast-in-place concrete flange plate to resist the partial pressure of "shear prying". Normative application of force calculations. However, in the actual application process, since the shear force transmission between the stud and the concrete flange is similar to a cylindrical hinge in line contact, the concrete f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/293E04B1/41
CPCE04B1/41E04C3/293
Inventor 曹华
Owner 曹华
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