A steel structure corrugated steel pipe joint component resistant to seismic and progressive collapse

Abstract

The present invention discloses a corrugated steel tube node component of a steel structure that is resistant to earthquakes and progressive collapse, comprising a corrugated steel tube, a steel column and a steel beam; the corrugated steel tube comprises a first flat plate, a second flat plate, an SMA shape memory alloy plate and a corrugated plate, one end of the SMA shape memory alloy plate and one end of the corrugated plate are both fixed to the first flat plate, the other end of the SMA shape memory alloy plate and the other end of the corrugated plate are both fixed to the second flat plate, the first flat plate is fixed to the steel column, and the second flat plate is fixed to the steel beam. The component can effectively solve the problem of structural damage caused by insufficient earthquake resistance and progressive collapse resistance of traditional steel structure nodes.

Description

Technical Field

[0001] The invention belongs to the field of steel structures and relates to a steel structure corrugated steel pipe node component which is earthquake-resistant and progressively collapse-resistant. Background Art

[0002] Steel structure engineering is widely used in the construction industry due to its advantages such as light weight, high strength, good plasticity and toughness, and high degree of mechanization in manufacturing and installation. As the service life of building structures has been longer in recent years, the probability of being subjected to accidental loads (such as earthquakes, fires, explosions, impacts, etc.) has correspondingly increased, and the probability of structural components being damaged or failing has also increased significantly. If the nodes are damaged prematurely, the structure will not be able to exert the catenary effect, which is mainly used to resist progressive collapse. Therefore, it is important to ensure that the nodes have sufficient strength and deformation capacity to prevent progressive collapse at the beam-column connection nodes. At the same time, the seismic design code for building structures requires that the nodes have sufficient ductility to meet the deformation requirements of the structure under earthquake action so as not to suffer brittle failure. Whether it is seismic design or progressive collapse design, nodes are crucial components. Therefore, there is an urgent need for a node component that can both resist earthquakes and progressive collapse. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a steel structure corrugated steel tube node component that is earthquake-resistant and progressively collapse-resistant. This component can effectively solve the problem of structural damage caused by insufficient earthquake resistance and progressive collapse resistance of traditional steel structure nodes.

[0004] To achieve the above-mentioned purpose, the earthquake-resistant and progressive collapse-resistant steel structure corrugated steel pipe node member of the present invention comprises a corrugated steel pipe, a steel column and a steel beam;

[0005] The corrugated steel pipe includes a first flat plate, a second flat plate, an SMA shape memory alloy plate and a corrugated plate. One end of the SMA shape memory alloy plate and one end of the corrugated plate are both fixed to the first flat plate, the other end of the SMA shape memory alloy plate and the other end of the corrugated plate are both fixed to the second flat plate, the first flat plate is fixed to the steel column, and the second flat plate is fixed to the steel beam.

[0006] The first plate and the steel column are connected by friction-type high-strength bolts.

[0007] The second flat plate and the steel beam are connected by high-strength bolts.

[0008] There are two corrugated plates, wherein the SMA shape memory alloy plate is located between the two corrugated plates.

[0009] The horizontal axis of the corrugated steel tube is in the same straight line as the neutral axis of the steel beam.

[0010] The SMA shape memory alloy plate is connected to the middle position of the first flat plate and the middle position of the second flat plate.

[0011] The first flat plate is provided with oblong bolt holes for passing friction type high-strength bolts.

[0012] The present invention has the following beneficial effects:

[0013] During the specific operation of the earthquake-resistant and continuous collapse-resistant corrugated steel tube node component of the present invention, a corrugated steel tube is arranged between the end of the steel beam and the steel column. Under normal use load, the corrugated steel tube does not undergo large deformation. Under the action of an earthquake, the corrugated plate stretches or compresses as the steel beam rotates, thereby increasing the ductility of the node and improving the earthquake resistance of the structure. In the early stage of continuous collapse of the structure, due to the generation of a beam mechanism in the structure, the failed column node is subjected to a negative bending moment, and the upper side of the node domain is compressed and the lower side is tensile. At this time, the corrugated plate stretches or compresses along its horizontal central axis, that is, the compressed area is compressed and the tensile area is stretched, thereby improving the rotation ability of the node in the early stage of continuous collapse. When the continuous collapse of the structure reaches the large deformation period, a catenary effect is generated in the structure. At this time, the node domain is in a fully tensile state. Without affecting the ultimate bearing capacity of the structure, the corrugated plate is fully stretched but not damaged, thereby ensuring that the catenary effect is fully exerted. In addition, when the structure is subjected to vertical impact loads, the friction-type high-strength bolts slide relative to the vertical oblong bolt holes to reduce the instantaneous impact energy injected into the structure, thereby reducing the probability of progressive collapse of the structure, and effectively solving the problems of insufficient node ductility in traditional steel structure nodes during earthquake resistance and premature damage to the node connection area during progressive collapse resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the present invention;

[0015] Figure 2 It is the front view of the present invention;

[0016] Figure 3 is a side view of the present invention;

[0017] Figure 4 A top view of the present invention;

[0018] Figure 5 This is the main view of the corrugated steel tube 4 connected to the beam column;

[0019] Figure 6 for Figure 5 Middle AA section.

[0020] Among them, 1 is a corrugated plate, 21 is a first flat plate, 22 is a second flat plate, 3 is an SMA shape memory alloy plate, 4 is a corrugated steel pipe, 5 is a steel column, 6 is a steel beam, 7 is a friction type high-strength bolt, and 8 is a high-strength bolt. DETAILED DESCRIPTION

[0021] The present invention is described in further detail below with reference to the accompanying drawings:

[0022] refer to Figures 1 to 6 The seismic and progressive collapse resistant steel structure corrugated steel tube node component of the present invention includes a corrugated steel tube 4, a steel column 5 and a steel beam 6; the corrugated steel tube 4 includes a first flat plate 21, a second flat plate 22, an SMA shape memory alloy plate 3 and a corrugated plate 1, one end of the SMA shape memory alloy plate 3 and one end of the corrugated plate 1 are both fixed on the first flat plate 21, the other end of the SMA shape memory alloy plate 3 and the other end of the corrugated plate 1 are both fixed on the second flat plate 22, the first flat plate 21 is fixed on the steel column 5, and the second flat plate 22 is fixed on the steel beam 6.

[0023] The first plate 21 is connected to the steel column 5 by friction-type high-strength bolts 7 ; the second plate 22 is connected to the steel beam 6 by high-strength bolts 8 . The first plate 21 is provided with oblong bolt holes for the friction-type high-strength bolts 7 to pass through.

[0024] There are two corrugated plates 1, wherein the SMA shape memory alloy plate 3 is located between the two corrugated plates 1; the horizontal axis of the corrugated steel tube 4 and the neutral axis of the steel beam 6 are on the same straight line; the SMA shape memory alloy plate 3 is connected to the middle position of the first flat plate 21 and the middle position of the second flat plate 22.

[0025] The first plate 21, the second plate 22, the corrugated plate 1, the steel column 5 and the steel beam 6 are all made of Q245 steel, Q345 steel, Q390 steel or Q420 steel. The friction type high-strength bolts 7 and the high-strength bolts 8 are all 8.8 or 10.9 grade high-strength bolts to ensure the strength of the node.

[0026] The construction process of the present invention is:

[0027] The corrugated steel pipe 4 is made using a mold, and bolt holes are opened on the first plate 21 and the second plate 22. During construction, the corrugated steel pipe 4 is first fixed to the steel column 5 using friction-type high-strength bolts 7, and then the steel beam 6 and the corrugated steel pipe 4 are connected by high-strength bolts 8.

[0028] It should be noted that, according to the seismic design requirements and progressive collapse resistance requirements of the building structure, the present invention should reasonably arrange the bending curvature of the corrugated plate 1 and the length of the corrugated line, so that the corrugated steel pipe 4 can be stretched or compressed during an earthquake, and can be fully stretched but not plastically damaged before the catenary effect is fully exerted during progressive collapse resistance, ensuring that the steel node fully exerts the catenary effect, so that the steel structure node has both seismic and progressive collapse resistance, thereby reducing structural damage.

Claims

1. A corrugated steel tube node member for a steel structure that is earthquake-resistant and progressively collapse-resistant, characterized in that: It comprises a corrugated steel pipe (4), a steel column (5) and a steel beam (6); The corrugated steel pipe (4) comprises a first flat plate (21), a second flat plate (22), an SMA shape memory alloy plate (3) and a corrugated plate (1); one end of the SMA shape memory alloy plate (3) and one end of the corrugated plate (1) are both fixed to the first flat plate (21); the other end of the SMA shape memory alloy plate (3) and the other end of the corrugated plate (1) are both fixed to the second flat plate (22); the first flat plate (21) is fixed to the steel column (5); and the second flat plate (22) is fixed to the steel beam (6); The first plate (21) and the steel column (5) are connected via friction-type high-strength bolts (7); The second flat plate (22) and the steel beam (6) are connected via high-strength bolts (8); The number of the corrugated plates (1) is two; The SMA shape memory alloy plate (3) is located between the two corrugated plates (1); The horizontal axis of the corrugated steel pipe (4) and the neutral axis of the steel beam (6) are on the same straight line; The SMA shape memory alloy plate (3) is connected to the middle position of the first flat plate (21) and the middle position of the second flat plate (22); The first flat plate (21) is provided with an oblong bolt hole for allowing the friction type high-strength bolt (7) to pass through; The corrugated steel pipe (4) is manufactured using a mold, and bolt holes are opened on the first flat plate (21) and the second flat plate (22). During construction, the corrugated steel pipe (4) is first fixed to the steel column (5) using a friction-type high-strength bolt (7), and then the steel beam (6) and the corrugated steel pipe (4) are connected using high-strength bolts (8).

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