CN203701279U - Novel stirrup shear connector - Google Patents

Abstract

The utility model discloses a novel stirrup shear connector. The novel stirrup shear connector comprises: a stirrup shear connector, a stirrup, a longitudinal reinforcement, a steel beam, a formwork, an end plate, and a transverse reinforcement; The steel bar is placed inside the stirrup, the stirrup is set on the upper flange of the steel beam, the formwork is set on the upper part of the end plate, the stirrup shear connector is set in the middle of the formwork, the transverse reinforcement is set on the formwork, the transverse reinforcement and the stirrup Rib stagger settings. The utility model is welded with the upper flange of the steel beam through the steel cage bound by the longitudinal steel bar and the stirrup, and then bound with the horizontal and vertical steel bars in the concrete slab to form a whole, which effectively improves the resistance of the steel beam-concrete composite member. Shear strength and rigidity; realize the coordinated force of concrete and steel beams, simple structure and convenient construction; limit lift-off deformation; increase the plastic deformation ability of concrete and steel beams, and improve the stability of concrete and steel beams and reliability.

Description

A New Type of Stirrup Shear Connector

technical field

The utility model belongs to the technical field of steel-concrete composite beam connectors, in particular to a novel stirrup shear connector. the

Background technique

The steel-concrete composite beam is a flexural member that connects the steel beam and the concrete slab as a whole through the shear connector and works together. The shear connector is the key component of the steel-concrete composite beam. It has two main functions: one is to bear and transmit the longitudinal shear force between the steel beam and the concrete slab; the other is to resist the connection between the concrete slab and the steel beam. The flipping effect between. Generally speaking, shear connectors can be divided into two categories: rigid connectors and flexible connectors. Specifically, they can be divided into the following four types: stud connectors, bent steel connectors, steel shear connectors, and openings. Steel connectors. the

Disadvantages of stud connectors: stud connectors are flexible connectors that can undergo large deformations. As the deformation progresses, the bearing capacity will be greatly reduced. In addition, the nail cap on the stud has a certain anti-lifting effect (under the action of force, there is a gap between the steel beam and the concrete slab due to inconsistent deformation), but due to the splitting effect, the cracks in the concrete around the nail cap expand rapidly. The protruding area of the nail cap is small, and the ability to resist lifting is limited. the

Disadvantages of section steel shear connectors: large volume, large amount of steel consumption, large amount of welding makes large welding residual strain on the steel plate and other disadvantages. the

Disadvantages of perforated steel plate connectors: Among perforated steel plate connectors, FBL connectors and Twin-FBL connectors are typical, which are prone to brittle failure, and the stress state of perforated plate connectors and the direction of concrete pouring have great influence on Both the shear stiffness and the shear strength during use have a relatively large negative impact, and the amount of steel used is very large. Moreover, the existence of steel plates also divides the concrete into several sections, which directly affects the integrity of the concrete slab, making the concrete and Steel beams cannot work well together, which ultimately affects the bearing capacity of the composite structure. the

Disadvantages of curved steel connectors: the one-way transmission of shear force, only the shear force in a fixed direction can be transmitted, and the shear force in alternating directions cannot be transmitted. Therefore, the setting direction of the bent-up steel bar connector is very strict, and the requirements for construction are high. In addition, the bent-up steel bar section is not conducive to the arrangement of the steel bars in the concrete. the

Utility model content

The purpose of this utility model embodiment is to provide a new type of stirrup shear connector, which aims to solve the problem of poor deformation resistance of existing stud connectors, large steel consumption of section steel shear connectors, and welding residual stress. Hole plate connectors are prone to brittle failure, and bent steel bar connectors have high construction requirements. the

The embodiment of the utility model is achieved in this way, a novel stirrup shear connector, the novel stirrup shear connector includes: stirrup shear connector, stirrups, longitudinal steel bars, steel beams, templates, end plates , transverse reinforcement;

The longitudinal reinforcement is placed inside the stirrup, the stirrup is set on the upper flange of the steel beam, the formwork is set on the upper part of the end plate, the stirrup shear connector is set in the middle of the formwork, the transverse reinforcement is set on the formwork, and the transverse reinforcement and The stirrups are staggered. the

Further, the stirrup cross section is set to be rectangular. the

Further, the longitudinal reinforcement is placed inside the stirrup by tying. the

Further, the stirrup is set on the upper flange of the steel beam by welding. the

Further, the stirrup shear connectors are set in the middle of the template by binding. the

Further, the transverse reinforcement and the stirrup are set in a staggered manner. the

The utility model has the following advantages:

1. When the external load acts, the stirrup is set to limit the lateral deformation of the concrete slab, and effectively improve the shear strength and stiffness of the steel beam-concrete composite member;

2. By pouring concrete, concrete and steel beams realize longitudinal and vertical shear resistance through the stirrup shear connector, and the concrete and connector are interwoven to improve the overall performance and vertical shear resistance;

3. Longitudinal steel bars and stirrups are set to realize the coordinated force bearing of concrete and steel beams, and the structure is simple and convenient for construction;

4. The setting of stirrups limits the lateral deformation, which is beneficial to control the deformation of the entire concrete and steel beam members, and limits the lifting deformation;

5. Effectively increase the plasticity and deformation ability of concrete and steel beams, and improve the stability and reliability of concrete and steel beams;

6. Renovate the original foundation. Longitudinal steel bars and stirrups are very common in concrete and steel beam engineering, easy to obtain and convenient to manufacture. the

Description of drawings

Fig. 1 is the structural representation of the novel stirrup shear connector that the utility model embodiment provides;

Fig. 2 is a schematic diagram of the device structure of the novel steel beam and stirrup connector provided by the embodiment of the present invention;

In the figure: 1. Stirrup shear connector; 1-1. Stirrup; 1-2. Longitudinal reinforcement; 2. Steel beam; 3. Formwork; 4. End plate; 5. Transverse reinforcement;

Fig. 3 is a flow chart of the method for preparing and installing the new stirrup shear connector provided by the embodiment of the present invention. the

Fig. 4 is a top view of the binding steel bars of the floor slab support formwork provided by the embodiment of the present invention. the

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. the

As shown in Figure 1, the novel stirrup shear connector of the embodiment of the present invention is mainly composed of a stirrup shear connector 1, a stirrup 1-1, a longitudinal reinforcement 1-2, a steel beam 2, a template 3, an end plate 4. Composed of 5 transverse steel bars; the cross section of the stirrup 1-1 is rectangular, the longitudinal steel bar 1-2 is placed inside the stirrup 1-1, and bound at the four corners of the stirrup 1-1, the stirrup 1-1 and the steel beam 2 The upper flanges are welded together; the formwork 3 is arranged on the top of the end plate 4, the stirrup shear connector 1 is arranged in the middle of the formwork 3 through the end plate 4, and the transverse reinforcement 5 is arranged on the formwork 3, as shown in Figure 4 , the horizontal reinforcement 5 and the stirrup 1-1 are staggered;

As shown in Figure 3, the preparation and installation method of the novel stirrup shear connector of the utility model embodiment comprises the following steps:

S301: Fabricate steel beams and stirrups and weld components;

S302: Structural hoisting;

S303: Binding steel bars for floor slab support formwork;

S304: Pouring concrete;

S305: Remove formwork after normal curing of concrete. the

The specific steps of the preparation and installation method of the novel stirrup shear connector of the utility model embodiment are:

In step S301, the steel beam 2 and the stirrup 1-1 (as shown in Figure 1 and Figure 2) are all manufactured in the factory and the welding work is completed; the longitudinal reinforcement 1-2 is placed on the inner four corners of the stirrup 1-1 to complete the binding (details See Fig. 1), the spacing and diameter of stirrup 1-1 and the diameter and spacing of longitudinal reinforcing bar 1-2 all will be determined according to the actual situation of the project; then adjust the distance of whole stirrup 1-1 cage edge and upper flange and Weld the stirrup 1-1 and the upper flange of the steel beam 2 firmly;

In step S303, the formwork 3 is supported at first, and then the horizontal steel bars 5 and the longitudinal steel bars 1-2 in the concrete slab are bound. Keep a certain distance between the two layers of steel bars. the

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model,

All modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model. the

Claims (5)

1. a novel stirrup shear connector, is characterized in that, this novel stirrup shear connector comprises: stirrup shear connector, stirrup, longitudinal reinforcement, girder steel, template, end plate, transverse reinforcement;

Longitudinal reinforcement is placed on stirrup inner side, and stirrup is arranged on the top flange of girder steel, and template-setup is on the top of end plate, and stirrup shear connector is arranged on the centre position of template, and transverse reinforcement is arranged in template, the setting of staggering of transverse reinforcement and stirrup.

2. novel stirrup shear connector as claimed in claim 1, is characterized in that, stirrup cross section is set to rectangle.

3. novel stirrup shear connector as claimed in claim 1, is characterized in that, longitudinal reinforcement is placed on stirrup inner side by colligation.

4. novel stirrup shear connector as claimed in claim 1, is characterized in that, stirrup is arranged on the top flange of girder steel by welding.

5. novel stirrup shear connector as claimed in claim 1, is characterized in that, stirrup shear connector is arranged on the centre position of template by colligation.