Fire-resistant steel structure beam-column joint

Abstract

The utility model relates to the technical field of building steel structure, concretely relates to a fire -resistant steel structure beam column joint, including steel column, steel beam, beam support support spare, first connecting piece, second connecting piece, fire -resistant heat insulating layer and protective housing, at the joint connection of steel column and steel beam, because first connecting piece and second connecting piece pass through the bolt fixation at the inclined plane, and set up fire -resistant heat insulating layer between both, fire -resistant heat insulating layer can effectively prevent the transmission of heat between connecting piece, reduce the node temperature -rising speed, improve the fire -resistant performance, simultaneously, the upper surface of beam support support spare sets up protective housing, and the first connecting piece and second connecting piece are wrapped in, and protective housing can block the flame direct contact node, further enhance the fire -resistant capacity, in addition, the hollow structure of first connecting piece and second connecting piece and reasonable connection mode can disperse stress to a certain extent, improve the node bearing capacity, make the node better resist deformation and damage in the fire.

Description

Technical Field

[0001] This utility model relates to the field of building steel structure technology, and in particular to a fire-resistant steel structure beam-column joint. Background Technology

[0002] In steel structures, beam-column joints are critical connection points, and their performance directly affects the stability and safety of the entire steel structure system. Currently, common steel structure beam-column joints mostly use welding or bolted connections to connect beams and columns. These traditional joints can meet the load-bearing requirements of the structure under normal use conditions, but they present many problems in some special situations, such as during a fire.

[0003] When a fire occurs, the mechanical properties of steel structural materials decrease sharply under high temperatures. The yield strength and elastic modulus of steel decrease significantly with increasing temperature, resulting in a substantial reduction in the load-bearing capacity of beam-column joints.

[0004] Therefore, traditional steel structure beam-column joints lack effective fire protection measures and are prone to deformation or even damage in a fire due to the softening of steel, which can lead to the collapse of the entire steel structure and seriously threaten the safety of people's lives and property. Utility Model Content

[0005] The purpose of this invention is to provide a fire-resistant steel structure beam-column joint, which solves the problems of poor fire resistance and fire prevention performance of existing steel structure beam-column joints in fires, and easy reduction and damage to load-bearing capacity due to high temperature.

[0006] To achieve the above objectives, this utility model provides a fire-resistant steel structure beam-column joint, including a steel column, a steel beam, a beam support member, a first connector, a second connector, a fireproof and heat-insulating layer, and a protective shell. The beam support member is installed on one side of the steel column, and the first connector is provided on the upper surface of the beam support member. The first connector is arranged in a right-angled triangle and has a hollow structure. The bottom of the first connector is welded to the upper surface of the beam support member, and the side of the first connector is connected to the steel column.

[0007] The end of the steel beam is placed on the upper surface of the beam support member. The end of the steel beam is welded with the second connector. The second connector is arranged in an inverted right-angled triangle and has a hollow structure. The inclined surface of the second connector is fixed to the inclined surface of the first connector by bolts. The fireproof and heat-insulating layer is provided between the side of the second connector and the inclined surface of the first connector. The upper surface of the beam support member is also provided with the protective shell, which is located outside the first connector and the second connector.

[0008] The beam support includes a fixed plate and a support plate. The fixed plate is connected to the side of the steel column. The support plate is fixedly installed at the top of the fixed plate. The support plate is perpendicular to the fixed plate. Multiple reinforcing ribs are provided between the angle between the support plate and the fixed plate. The end of the steel beam is placed on the upper surface of the support plate.

[0009] The support plate has a placement step at one end away from the upper surface of the steel column, and the end of the steel beam is placed on the placement step.

[0010] The fireproof and heat-insulating layer is composed of multiple layers of fire-resistant fiber felt, and the fire-resistant fiber felt is made of either ceramic fiber or aluminum silicate fiber.

[0011] The outer surface of the protective shell is provided with a fire-retardant coating layer. The protective shell includes a first half-shell and a second half-shell. The first half-shell and the second half-shell are symmetrically arranged on both sides of the second connector. A first wing plate is provided on the side of the first half-shell and the second half-shell facing each other. A second wing plate is provided on the side of the first half-shell and the second half-shell near the upper surface of the support plate. The two first wing plates are fixed by bolts, and the two second wing plates are connected to the support plate.

[0012] This utility model discloses a fire-resistant steel structure beam-column joint, comprising a steel column, a steel beam, a beam support member, a first connector, a second connector, a fireproof insulation layer, and a protective shell. At the joint connection between the steel column and the steel beam, the first connector and the second connector are fixed by bolts at an inclined surface, and the fireproof insulation layer is provided between them. The fireproof insulation layer can effectively prevent the transfer of heat between the connectors, reduce the temperature rise rate of the joint, and improve fire resistance. At the same time, the protective shell is provided on the upper surface of the beam support member, enclosing the first connector and the second connector. The protective shell can prevent flames from directly contacting the joint, further enhancing the fire resistance. In addition, the hollow structure and reasonable connection method of the first connector and the second connector can disperse stress to a certain extent, improve the load-bearing capacity of the joint, and enable the joint to better resist deformation and damage in a fire. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a structural schematic diagram of the fire-resistant steel structure beam-column joint provided by this utility model.

[0015] Figure 2 This utility model provides Figure 1Enlarged view of the local structure at point A.

[0016] Figure 3 This is a partial structural schematic diagram of the fire-resistant steel structure beam-column joint provided by this utility model.

[0017] Figure 4 This utility model provides Figure 3 Enlarged view of the local structure at point B.

[0018] 101-Steel column, 102-Steel beam, 103-First connector, 104-Second connector, 105-Fireproof and heat-insulating layer, 106-Fixing plate, 107-Supporting plate, 108-First half-shell, 109-Second half-shell, 110-Reinforcing rib, 111-Placement step, 112-First wing plate, 113-Second wing plate. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1 to 4 ,in Figure 1 This is a structural schematic diagram of a fire-resistant steel structure beam-column joint. Figure 2 yes Figure 1 Enlarged view of the local structure at point A. Figure 3 This is a partial structural schematic diagram of the beam-column joint of a fire-resistant steel structure. Figure 4 yes Figure 3 Enlarged view of the local structure at point B.

[0021] This utility model provides a fire-resistant steel structure beam-column joint, comprising a steel column 101, a steel beam 102, a beam support member, a first connector 103, a second connector 104, a fireproof and heat-insulating layer 105, and a protective shell. The beam support member includes a fixing plate 106 and a support plate 107, and the protective shell includes a first half-shell 108 and a second half-shell 109. This solution addresses the problems of poor fire resistance and susceptibility to load-bearing capacity reduction and damage due to high temperatures in existing steel structure beam-column joints during fires. It is understood that this solution can be applied to the structure of steel structure beam-column joints.

[0022] In this specific embodiment, a beam support is installed on one side of the steel column 101. A first connector 103 is provided on the upper surface of the beam support. The first connector 103 is a right-angled triangle with a hollow structure. The bottom of the first connector 103 is welded to the upper surface of the beam support. The side of the first connector 103 is connected to the steel column 101. The end of the steel beam 102 rests on the upper surface of the beam support. A second connector 104 is welded to the end of the steel beam 102. The second connector 104 is an inverted right-angled triangle with a hollow structure. The inclined surface of the second connector 104 is fixed to the inclined surface of the first connector 103 by bolts. A fireproof and heat-insulating layer 105 is provided between the side of the second connector 104 and the inclined surface of the first connector 103. The upper surface of the beam support also has... The protective outer shell is disposed outside the first connector 103 and the second connector 104 at the node connection between the steel column 101 and the steel beam 102. Since the first connector 103 and the second connector 104 are fixed by bolts at the inclined surface and the fireproof and heat-insulating layer 105 is provided between them, the fireproof and heat-insulating layer 105 can effectively prevent the transfer of heat between the connectors, reduce the temperature rise rate of the node, and improve the fire resistance performance. At the same time, the protective outer shell is provided on the upper surface of the beam support member, which encloses the first connector 103 and the second connector 104. The protective outer shell can prevent flames from directly contacting the node, further enhancing the fire resistance. In addition, the hollow structure and reasonable connection method of the first connector 103 and the second connector 104 can disperse stress to a certain extent, improve the load-bearing capacity of the node, and enable the node to better resist deformation and damage in a fire.

[0023] The fixing plate 106 is connected to the side of the steel column 101. The top of the fixing plate 106 is fixedly provided with the support plate 107, which is perpendicular to the fixing plate 106. Multiple reinforcing ribs 110 are provided between the angle between the support plate 107 and the fixing plate 106. The end of the steel beam 102 is placed on the upper surface of the support plate 107. By providing multiple reinforcing ribs 110 between the angle between the support plate 107 and the fixing plate 106, the structural strength and stability of the connection part are significantly enhanced, enabling it to better withstand the load from the steel beam 102.

[0024] Secondly, a placement step 111 is provided at one end of the support plate 107 away from the upper surface of the steel column 101. The end of the steel beam 102 is placed on the placement step 111. The design of the placement step 111 allows the end of the steel beam 102 to be placed more stably, enhances the fit between the steel beam 102 and the support plate 107, and improves the overall connection stability of the node.

[0025] Meanwhile, the fireproof and heat-insulating layer 105 is composed of multiple layers of fire-resistant fiber felt, and the fire-resistant fiber felt is made of either ceramic fiber or aluminum silicate fiber.

[0026] In addition, the outer surface of the protective shell is provided with a fire-retardant coating layer. The first half-shell 108 and the second half-shell 109 are symmetrically arranged on both sides of the second connector 104. A first wing plate 112 is provided on the side of the first half-shell 108 and the second half-shell 109 facing each other, and a second wing plate 113 is provided on the side of the first half-shell 108 and the second half-shell 109 near the upper surface of the support plate 107. The two first wing plates 112 are fixed by bolts, and the two second wing plates 113 are connected to the support plate 107. The protective shell is composed of symmetrically arranged on both sides of the second connector 104. The first half-shell 108 and the second half-shell 109 are combined and fixed together by bolts to the first wing plate 112, which facilitates installation and ensures a stable connection. At the same time, the second wing plate 113, which is close to the upper surface of the support plate 107, is connected to the support plate 107, so that the protective shell is tightly integrated with the overall structure. This provides reliable physical protection for the steel structure beam-column joint. In the event of a fire, the fireproof coating layer and the protective shell work together to effectively block flames and heat, reduce the rate of temperature rise of the joint, improve the fire resistance of the joint in a fire, and reduce the risk of load-bearing capacity reduction and damage caused by high temperature.

[0027] When using the fire-resistant steel structure beam-column joint of this utility model, at the joint connection between the steel column 101 and the steel beam 102, since the first connector 103 and the second connector 104 are fixed by bolts at the inclined surface, and the fireproof and heat-insulating layer 105 is provided between them, the fireproof and heat-insulating layer 105 can effectively prevent the transfer of heat between the connectors, reduce the temperature rise rate of the joint, and improve the fire resistance performance. At the same time, the protective shell is provided on the upper surface of the beam support member, which encloses the first connector 103 and the second connector 104. The protective shell can block the flame from directly contacting the joint, further enhancing the fire resistance. In addition, the hollow structure and reasonable connection method of the first connector 103 and the second connector 104 can disperse stress to a certain extent, improve the load-bearing capacity of the joint, and enable the joint to better resist deformation and damage in a fire. Furthermore, with the dual effect of the fireproof coating layer and the protective shell, the flames and heat are effectively blocked, the temperature rise rate of the joint is reduced, the fire resistance of the joint in a fire is improved, and the risk of load-bearing capacity reduction and damage caused by high temperature is reduced.

[0028] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A fire-resistant steel structure beam-column joint, characterized in that, The system includes steel columns, steel beams, beam support members, a first connector, a second connector, a fireproof and heat-insulating layer, and a protective shell. The beam support member is installed on one side of the steel column. The first connector is provided on the upper surface of the beam support member. The first connector is arranged in a right-angled triangle and has a hollow structure. The bottom of the first connector is welded to the upper surface of the beam support member, and the side of the first connector is connected to the steel column. The end of the steel beam is placed on the upper surface of the beam support member. The end of the steel beam is welded with the second connector. The second connector is arranged in an inverted right-angled triangle and has a hollow structure. The inclined surface of the second connector is fixed to the inclined surface of the first connector by bolts. The fireproof and heat-insulating layer is provided between the side of the second connector and the inclined surface of the first connector. The upper surface of the beam support member is also provided with the protective shell, which is located outside the first connector and the second connector.

2. The fire-resistant steel structure beam-column joint as described in claim 1, characterized in that, The beam support includes a fixed plate and a support plate. The fixed plate is connected to the side of the steel column. The support plate is fixedly installed at the top of the fixed plate. The support plate is perpendicular to the fixed plate. Multiple reinforcing ribs are provided between the angle between the support plate and the fixed plate. The end of the steel beam is placed on the upper surface of the support plate.

3. The fire-resistant steel structure beam-column joint as described in claim 2, characterized in that, A placement step is provided at one end of the support plate away from the upper surface of the steel column, and the end of the steel beam is placed on the placement step.

4. The fire-resistant steel structure beam-column joint as described in claim 3, characterized in that, The fireproof and heat-insulating layer is composed of multiple layers of fire-resistant fiber felt, and the fire-resistant fiber felt is made of either ceramic fiber or aluminum silicate fiber.

5. The fire-resistant steel structure beam-column joint as described in claim 4, characterized in that, The outer surface of the protective shell is provided with a fire-retardant coating layer. The protective shell includes a first half-shell and a second half-shell. The first half-shell and the second half-shell are symmetrically arranged on both sides of the second connector. A first wing plate is provided on the side of the first half-shell and the second half-shell facing each other. A second wing plate is provided on the side of the first half-shell and the second half-shell near the upper surface of the support plate. The two first wing plates are fixed by bolts, and the two second wing plates are connected to the support plate.

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