An assembled steel structure beam-column grouting and anchoring joint

Abstract

The present invention relates to a beam-column joint of a building structure, specifically to a grouting and anchoring joint of prefabricated steel structure beam and column, which includes a steel column, a steel column bracket, a steel beam, and a steel beam anchor. The steel beam anchor is connected to the end of the steel beam. The steel column bracket is provided with a grouting box body, which is a fully enclosed box body. The upper roof plate of the grouting box body is provided with a grouting hole and a reserved hole for the steel beam anchor. The steel beam anchor can be inserted from the reserved hole for the steel beam anchor at the top of the grouting box body, and the grouting hole at the top of the grouting box body can be used to pour high-strength concrete or grouting material into the grouting box body. The present invention uses concrete or cement-based grouting material to anchor and connect with the steel structure, giving full play to the advantages of better compressive performance of concrete or cement-based grouting material and better tensile performance of steel, greatly improving the on-site installation efficiency, increasing the construction speed, significantly reducing the cost, and making the steel structure connection joint superior to other connection forms.

Description

Technical Field

[0001] The invention relates to a building structure beam-column node, in particular to an assembled steel structure beam-column grouting anchor node. Background Art

[0002] At present, prefabricated buildings are booming in my country, including prefabricated steel structures, prefabricated concrete structures, prefabricated wood structures, etc. Among them, prefabricated steel structures are widely used in large-span buildings such as industrial plants and large public buildings, giving full play to the advantages of steel structures such as large span, lightness, and flexibility.

[0003] There are three ways to connect steel structure components: ① welding; ② bolt connection; ③ rivet connection. In the first welding method, due to the local heating of the connected components and uneven cooling after welding, welding residual stress and welding deformation will be generated in the steel structure parent material. The second bolt connection method is divided into ordinary bolt connection and high-strength bolt connection. Bolt connection requires high component processing accuracy, and the efficiency is greatly reduced when errors occur in the installation at the construction site. The third connection method, rivet connection, has better toughness and plasticity. However, riveting is more labor-intensive than bolting and more material-intensive than welding, and is only used for large-span steel structures that bear large dynamic loads. Riveting is rarely used due to its complex process. In addition, these three traditional connection methods require high technical requirements for construction workers when splicing steel structure components at high altitude on site, and are time-consuming and labor-intensive. As a result, the phenomenon of cutting, expanding holes, and repair welding in violation of design specifications at the construction site has been repeatedly banned. Summary of the invention

[0004] In view of the problems that the three traditional connection methods of existing steel structures have high technical requirements for construction workers in positioning, correction and connection when splicing components at high altitude on site, complex construction process, time-consuming, labor-intensive, and difficult to ensure quality, the present invention provides another quick-assembled assembly connection node - grouting anchor connection node, which is simple to connect, high in construction efficiency, safe, and easy to ensure quality.

[0005] The present invention is achieved through the following technical solutions:

[0006] A prefabricated steel structure beam-column grouting anchor node comprises a steel column, a steel column corbel, a steel beam, and a steel beam anchor. The steel beam anchor is connected to the end of the steel beam. The steel column corbel is provided with a grouting box, in which grouting material can be poured, and the steel beam anchor can be inserted from the top of the grouting box.

[0007] Preferably, the grouting box is a semi-enclosed box with an open top.

[0008] Preferably, the grouting box body is a fully enclosed box body. The upper roof plate of the grouting box body is provided with a grouting hole and a reserved hole for the steel beam anchor. The steel beam anchor can be inserted from the reserved hole for the steel beam anchor at the top of the grouting box body, and the grouting hole at the top of the grouting box body can be used to pour high-strength concrete or grouting material into the grouting box body.

[0009] Preferably, the steel column bracket is an H-shaped steel bracket, and the grouting box body is located above the steel column bracket.

[0010] Preferably, the steel column bracket is a box-shaped steel bracket, and the grouting box body is located inside the steel column bracket.

[0011] Preferably, the steel beam anchor is a bolt, a cross stiffening plate, a parallel double stiffening plate, square or circular.

[0012] The beneficial effects of the present invention are as follows: By using concrete or cement-based grouting material for anchoring connection with the steel structure, the advantages of better compressive performance of concrete or cement-based grouting material and better tensile performance of steel are fully utilized, making the steel structure connection node superior to other connection forms. In the present invention, the beam-column joint is conducive to the force conduction between the steel column and the steel beam. The anchoring method of inserting the anchor on the steel beam into the grouting box body in the steel column bracket can not only achieve the reliable connection between the steel column and the steel beam, but also effectively restrain the end of the steel beam, and the end of the steel beam is less damaged or even not damaged under the action of earthquake. The integrity of the core area of the beam-column joint is strengthened, meeting the basic requirements of current structural design and seismic design, namely "strong columns and weak beams" and "strong shear and weak flexure". The present invention does not require a large amount of time to install high-strength bolts during the on-site connection of beams and columns. The present invention aims to solve the problem of errors existing in the installation process of the steel structure. The errors in manufacturing, processing and installation are consumed and absorbed in the grouting box body, greatly improving the on-site installation efficiency, increasing the construction speed and significantly reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of each component of a preferred specific embodiment of the present invention.

[0014] Figure 2 is Figure 1 The installation structural schematic diagram of the shown preferred specific embodiment.

[0015] Figure 3 It is the installation structural schematic diagram of another specific embodiment of the present invention.

[0016] Figure 4 It is the cross-sectional form diagram of the anchor of a specific embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Such as Figure 1As shown in the figure, a grouting and anchoring joint for prefabricated steel structure beam-column includes a steel column 1, a steel column bracket 2, a grouting box 3, a steel beam 4, a steel beam anchor 5, and grouting material 6. The steel beam anchor 5 is connected to the end of the steel beam 4. The steel column bracket 2 is provided with a grouting box 3, and the steel beam anchor 5 can be inserted from the top of the grouting box 3. In this embodiment, the steel column bracket 2 is an H-shaped steel bracket, and the grouting box 3 is welded to the upper part of the steel column bracket 2 to form an integral component. The grouting box 3 is a fully enclosed box, welded by six faces, and there shall be no grout leakage. A steel beam anchor insertion hole 10 is reserved on the upper roof of the grouting box 3, and the insertion hole is 10 - 20 mm larger than the outer contour line of the steel beam anchor 5. The steel beam anchor 5 can be inserted from the steel beam anchor reserved hole 10 on the top of the grouting box 3. A grouting hole 9 is reserved on the upper roof of the box body, and the grouting hole 9 can be used to pour high-strength concrete or grouting material into the grouting box.

[0018] Among them, the steel column 1 with the steel column bracket 2 and the grouting box 3 on the bracket 2 are prefabricated and welded into an integral component in the factory. The steel beam 4 and the anchor 5 with a transition plate 7 are processed and completed in the factory. When using a rigid connection joint, the steel beam 4 and the anchor 5 are welded into an integral component; when using a hinged joint, the steel beam 4 and the anchor 5 are bolt-connected as a pre-assembled component and pre-assembled in the factory. The on-site installation includes the following steps: hoist the steel column 1, correct the axis, and check the accuracy of the axis and elevation position of the steel column 1; hoist the steel beam 4, and insert the steel beam anchor 5 into the grouting box 3 of the steel column bracket 2; correct the accuracy of the axis and elevation position of the steel beam 4; complete the installation and positioning of other beam-columns in the same way; after confirming that the installation and positioning of the entire floor steel beam 4 and steel column 1 are completed, pour high-strength concrete or grouting material into the grouting box 3 of the steel column bracket 2; cure the high-strength concrete and grouting material. The grouting material uses a high-strength cement-based material above C60 and a self-compacting and slightly expanding fine aggregate concrete above C30.

[0019] As Figure 3 shown, the steel column bracket 2 of this specific embodiment is a box-shaped steel bracket, and the grouting box 3 is located inside the steel column bracket 2 and welded into an integral component. Its installation process is the same as that of the previous preferred embodiment.

[0020] In addition, the grouting box 3 of the above two embodiments can also be a semi-closed box with an open top, welded by five faces, and there shall be no grout leakage. The upper top surface of the grouting box 3 is not welded, and the steel beam anchor 5 is directly inserted into the grouting box 3, and then high-strength concrete or grouting material 6 is poured into the grouting box 3 to achieve the anchoring of the steel beam 4 and the steel column 1.

[0021] As Figure 4 shown, the steel beam anchor 5 can be a bolt, a cross stiffener, a parallel double stiffener, square or circular.

[0022] The grouting and anchoring joint described in the present invention can also be applied to the connection between columns and columns, and between beams and beams.

Claims

1. An assembled steel structure beam-column grouting and anchoring joint, comprising a steel column, a steel column bracket, a steel beam, and a steel beam anchor. It is characterized in that the steel beam anchor is connected to the end of the steel beam, the steel column bracket is a box-shaped steel bracket, the steel column bracket is provided with a grouting box body, the grouting box body is located inside the steel column bracket and is welded into an integral component, grouting material can be poured into the grouting box body, and the steel beam anchor can be inserted from the top of the grouting box body; the grouting box body is a fully enclosed box body, the upper top plate of the grouting box body is provided with a grouting hole and a reserved hole for the steel beam anchor, the steel beam anchor can be inserted from the reserved hole for the steel beam anchor at the top of the grouting box body, and the grouting hole at the top of the grouting box body can be used to pour high-strength concrete or grouting material into the grouting box body.

2. The assembled steel structure beam-column grouting and anchoring joint according to claim 1, it is characterized in that the steel beam anchor is a bolt, a cross stiffening plate or a parallel double stiffening plate.

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