A construction method for wind-resistant column connection nodes at the ridge of a portal frame roof.

Abstract

This utility model belongs to the field of building steel structure technology, specifically disclosing a wind-resistant column connection node structure at the ridge of a portal frame roof. The node end plate of the connection node structure is fixed to the node end face of the roof beam. Two roof beams are connected to each other through corresponding node end plates to form an "A" shape. The wind-resistant column is vertically installed below the ridge of the two roof beams, with its top fixed to the node end plate. The upper part of the connecting plate is connected to the node end plate by bolt I, and the lower part is connected to the web of the wind-resistant column by bolt II. A steel pad is placed between the connecting plate and the web of the wind-resistant column and is fixed through by bolt II. This utility model connects the upper and lower node end plates and the web of the wind-resistant column through the connecting plate, and sets a steel pad between the connecting plate and the web of the wind-resistant column, thereby reliably transmitting the shear force generated by wind loads without affecting the deformation of the roof beams under vertical loads. It features simple structure, reliable force transmission, free deformation, and convenient construction.

Description

Technical Field

[0001] This utility model belongs to the field of building steel structure technology, specifically relating to a simple structure, reliable force transmission, free deformation, and convenient construction of a wind-resistant column connection node at the ridge of a portal frame. Background Technology

[0002] In industrial buildings, steel structure workshops such as portal frames are widely used due to their advantages of convenient construction and good economy. However, due to the special requirements of process layout (such as equipment layout and space constraints), the arrangement of wind-resistant columns in some lightweight steel structure workshops cannot follow conventional standard designs. For example, sometimes, to ensure the rationality of stress and economy, the column head node of the wind-resistant column may be set below the ridge, that is, at the joint of two roof beams. This arrangement breaks with the traditional structure, making the original connection method no longer applicable, and requiring the reconstruction of a reasonable and feasible connection node.

[0003] Due to the aforementioned changes in the arrangement of wind-resistant columns, it is necessary to explore a new connection node construction form that can simultaneously satisfy: 1. The roof's A-frame rigid beams can freely deform vertically under temperature changes or loads, avoiding stress concentration in components due to nodal constraints; 2. The column heads of the wind-resistant columns can form stable horizontal hinged supports, effectively transferring horizontal forces caused by wind loads to ensure the overall safety and rationality of the structure. Simultaneously, this structure should also meet the requirements of convenient construction, simple operation, and simple construction to adapt to current engineering construction needs.

[0004] Regarding the requirements for the aforementioned connection node construction, existing patents and standard drawings provide several node construction schemes: such as fixing connecting plates with vertical elongated holes to the top of the wind-resistant column and the bottom surface of the roof beam, and achieving a sliding connection through bolts; this structure allows the roof beam to deform freely vertically under temperature changes or loads to avoid stress concentration, while the horizontal wind load is directly transferred to the wind-resistant column through the bolts. Although it is low-cost, easy to construct, and meets the aforementioned requirements, the elongated holes may experience bolt slippage and impact under reciprocating loads such as earthquakes and typhoons, which can easily cause bolt breakage or vertical enlargement of the elongated holes. The enlarged elongated holes result in excessive free vertical movement, affecting the structural safety of the roof beam. Furthermore, the connecting plates are fixedly connected to the top of the wind-resistant column and the bottom surface of the roof beam, so the connecting plates need to be cut and then welded to restore their intended function, making the construction less simple and the construction cumbersome. Another approach involves a sliding layer combining PTFE (polytetrafluoroethylene) and stainless steel plates, integrated with a wind-resistant panel structure. Under normal wind loads, the wind-resistant panel provides horizontal stiffness, while under earthquakes or extreme loads, it yields to allow the supports to slide freely. The supports are connected to the roof beams and the wind-resistant panel via upper and lower connecting plates. While the wind-resistant panel transmits horizontal forces under normal use and releases constraints during earthquakes, adapting to complex conditions, and PTFE plates have a low coefficient of friction and stable long-term sliding performance, the wind-resistant panel requires high-strength steel, and PTFE is expensive, leading to higher costs. Furthermore, the installation of the sliding layer requires strict control of flatness, resulting in demanding construction requirements. Another approach utilizes a combined hinged-sliding node technology that achieves deformation coordination through the multi-directional movement of a core and sleeve. The core connects to the roof beam, and the sleeve connects to the wind-resistant column, with the two connected by a pin. The core is allowed to slide within the sleeve, converting spatial internal forces into planar deformation and preventing the wind-resistant column from bearing additional bending moments. While it can simultaneously meet the requirements of vertical sliding and horizontal hinge, making it suitable for complex load conditions, and with its dual force transmission paths of pin and sliding surface improving node reliability, the high precision requirements for the fit between the ferrule and the sleeve result in a complex structure and high cost. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a simple, reliable, deformable, and convenient wind-resistant column connection node structure for portal frame roof ridges.

[0006] The wind-resistant column connection node structure at the ridge of the portal frame of this utility model is implemented as follows: it includes a roof beam, a node end plate, and a wind-resistant column. The node end plate is fixedly connected to the node end face of the roof beam. The two roof beams are fixedly connected to each other through corresponding node end plates to form a "V" shape. The wind-resistant column is vertically set below the ridge of the two roof beams and its top is fixedly connected to the node end plate. It also includes a connecting plate and a steel pad. The upper part of the connecting plate is connected to the node end plate by bolt I and the lower part is connected to the web of the wind-resistant column by bolt II. The steel pad is set between the connecting plate and the web of the wind-resistant column and is fixed by bolt II.

[0007] Furthermore, the upper part of the connecting plate is provided with at least two circular holes through which bolt I can pass, and the lower part is provided with at least two vertically extending elongated holes through which bolt II can pass.

[0008] Furthermore, the node end plate extends at least from the lower end of the connected roof beam to the lower surface. The lower end of the node end plate is provided with a stiffening plate fixedly connected to the lower surface of the roof beam on the side near the extension direction of the connected roof beam. The upper part of the connecting plate is provided with a clearance groove into which the stiffening plate can be inserted.

[0009] Furthermore, the thickness of the steel pad is half the thickness of the node end plate minus the thickness of the web of the wind-resistant column, ±0.2 mm.

[0010] Furthermore, the steel pad is movably disposed between the connecting plate and the web of the wind-resistant column, or welded around the corresponding position of the web of the wind-resistant column, and through holes for bolts II are respectively opened on the steel pad and the web of the wind-resistant column.

[0011] Furthermore, the top of the connecting plate abuts against the lower surface of the corresponding roof beam, and the lower part of the connecting plate is connected to the web of the wind-resistant column by bolt II that passes through the middle of the elongated hole.

[0012] Furthermore, a connecting plate and a steel pad are respectively provided on both sides of the web of the wind-resistant column. The top of the steel pad after it is fixed is not higher than the top of the web of the wind-resistant column, and a gap is provided between the bottom of the node end plate and the top of the web of the wind-resistant column.

[0013] Furthermore, a longitudinally extending roof tie rod is fixedly connected to the side of the node end plate, and an inclined roof brace is fixedly connected to the wing plate or web plate of the roof beam.

[0014] This utility model has the following beneficial effects: 1. This utility model establishes a dual force transmission system of "sliding-hinged" by using a circular hole at the upper part of the connecting plate to connect with the node end plate, and an oblong hole at the lower part to connect with the wind-resistant column. Horizontal wind loads are directly transmitted through the shear force of the bolts in the upper circular hole of the connecting plate, ensuring reliable force transmission. Vertical displacement is released by sliding through the oblong hole at the lower part of the connecting plate. This avoids the impact of bolts on the hole wall under cyclic loads, as is common in traditional all-node oblong holes, fundamentally solving the problems of bolt breakage and hole wall wear, and greatly improving the durability and seismic / wind resistance of the node. In particular, the arrangement of connecting plates and steel pads on both sides of the web of the wind-resistant column ensures symmetrical and reliable force transmission, thereby guaranteeing the effective transmission of horizontal wind loads and significantly improving the overall wind resistance of the roof. Meanwhile, by setting steel pads, the thickness difference between the node end plate and the web of the wind-resistant column is precisely compensated, ensuring that the connecting plate and the web of the wind-resistant column are tightly fitted, avoiding additional bending moments in the connecting plate due to uneven plate thickness, making the node stress more in line with the ideal hinge calculation model, and improving the safety of the structure; and the wind-resistant column structure located at the ridge steel beam node increases the possibility of actual engineering layout of the wind-resistant column in the factory building, making it highly practical.

[0015] 2. This utility model directly utilizes existing node end plates (used to connect two roof beams) as the foundation for connection with wind-resistant columns, eliminating the need for additional welding of connectors to the roof beams. This not only results in greater overall stiffness and better integrity in the node area but also simplifies construction. Furthermore, the interlocking structure between the stiffening plate at the lower end of the node end plate and the clearance groove on the connecting plate facilitates installation and positioning, reducing on-site measurement and layout work. It also effectively limits the out-of-plane deformation and displacement of the connecting plate, enhancing the stability and stiffness of the node against out-of-plane loads (such as longitudinal seismic forces), thereby significantly improving structural reliability. In particular, the pre-reserved gap between the top of the web of the wind-resistant column and the bottom of the node end plate buffers the impact of earthquakes or extreme loads, reducing component damage.

[0016] 3. The entire node of this utility model consists of pre-welded node end plates, connecting plates, steel pads, and high-strength bolts. All components can be prefabricated in the factory, and only assembly and bolt tightening are required on site. Therefore, the construction efficiency is high and the quality is easy to control. Moreover, the elongated hole at the bottom of the connecting plate provides sufficient adjustment space for vertical sliding. During installation, the vertical position can be finely adjusted, thereby reducing the precision requirements for component processing and installation and avoiding installation difficulties caused by construction and processing errors.

[0017] 4. All components of this utility model are made of conventional steel (steel plates and bolts), eliminating the need for expensive materials such as polytetrafluoroethylene plates and high-strength special wind-resistant plates, thus significantly reducing material costs. Moreover, the nodes are mainly connected by bolts. If damage occurs in extreme cases (such as bolt damage or excessive vertical enlargement of the elongated hole), the function can be restored simply by replacing the corresponding bolts and connecting plates. Unlike traditional welded nodes, there is no need for complex cutting and re-welding. The maintenance cost is extremely low and the operation is simple.

[0018] In summary, this utility model achieves "strong hinge and weak sliding" through ingenious structural design, thereby physically separating and optimizing the functions of "rigid connection" that transmits strong horizontal force and "flexible sliding" that releases vertical deformation. It simultaneously meets multiple requirements such as reliable force transmission, free deformation, simple construction, and economic durability, effectively solving the special needs of wind-resistant column connection at the ridge, and is suitable for the promotion and application of lightweight steel structure workshops in industrial buildings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 The front view; Figure 3 for Figure 2 The right view; Figure 4 This is an enlarged view of the connecting plate structure of this utility model; Figure 5 This is an enlarged view of the steel pad structure of this utility model; In the diagram: 1-Roof beam, 2-Node end plate, 21-Stiffening plate, 3-Wind-resistant column, 4-Connecting plate, 41-Round hole, 42-Oblong hole, 43-Allowing groove, 5-Steel pad, 6-Bolt I, 7-Bolt II, 8-Roof longitudinal tie rod, 9-Roof diagonal brace. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0021] like Figures 1 to 5 As shown, the wind-resistant column connection node structure at the ridge of the portal frame of this utility model includes a roof beam 1, a node end plate 2, and a wind-resistant column 3. The node end plate 2 is fixedly connected to the node end face of the roof beam 1. The two roof beams 1 are fixedly connected to each other through the corresponding node end plates 2 to form a "V" shape. The wind-resistant column 3 is vertically set below the ridge of the two roof beams 1 and its top end is fixedly connected to the node end plate 2. It also includes a connecting plate 4 and a steel pad 5. The upper part of the connecting plate 4 is connected to the node end plate 2 by bolt I6 and the lower part is connected to the web of the wind-resistant column 3 by bolt II7. The steel pad 5 is disposed between the connecting plate 4 and the web of the wind-resistant column 3 and is fixed by bolt II7.

[0022] The upper part of the connecting plate 4 is provided with at least two round holes 41 through which bolt I6 can pass, and the lower part is provided with at least two vertically extending elongated holes 42 through which bolt II7 can pass.

[0023] The node end plate 2 extends at least from the lower end of the connected roof beam 1 to the lower surface. The lower end of the node end plate 2 is provided with a stiffening plate 21 fixedly connected to the lower surface of the roof beam 1 on the side near the extension direction of the connected roof beam 1. The upper part of the connecting plate 4 is provided with a relief groove 43 into which the stiffening plate 21 can be inserted.

[0024] The thickness of the steel pad 5 is half the thickness of the node end plate 2 minus the web thickness of the wind-resistant column 3, ±0.2 mm.

[0025] The steel pad 5 is movably disposed between the connecting plate 4 and the web of the wind-resistant column 3, or welded around the corresponding position of the web of the wind-resistant column 3. The steel pad 5 and the web of the wind-resistant column 3 are respectively provided with through holes through which bolts II7 can pass.

[0026] The top of the connecting plate 4 abuts against the lower surface of the corresponding roof beam 1, and the lower part of the connecting plate 4 is connected to the web of the wind-resistant column 3 by bolt II7 that passes through the middle of the elongated hole 42.

[0027] The wind-resistant column 3 has a connecting plate 4 and a steel pad 5 on both sides of its web. The top of the steel pad 5 after it is fixed is not higher than the top of the web of the wind-resistant column 3. A gap is provided between the bottom of the node end plate 2 and the top of the web of the wind-resistant column 3.

[0028] The side of the node end plate 2 is fixedly connected with a longitudinally extending roof tie rod 8, and the wing plate or web plate of the roof beam 1 is fixedly connected with an inclined roof brace 9.

[0029] The working principle and process of this utility model: like Figures 1 to 5As shown, firstly, two roof beams 1 are connected to each other by bolts or welding through the corresponding end plates 2 on their end faces to form a "V"-shaped roof surface; then, by bolt I6, a pair of round holes 41 on the top of the two rectangular connecting plates 4 are connected to the through holes at the bottom of the end plates 2, and the stiffening plates 21 of the end plates 2 are inserted into the relief grooves 43 at the top of the connecting plates 4; then, according to the actual gap, steel pads 5 of a certain thickness are welded around the web of the wind-resistant column 3 corresponding to the elongated holes 42 at the bottom of the rectangular connecting plates 4; then, by bolt II7 passing through the elongated holes 42 on the connecting plates 4 and the through holes on the web of the wind-resistant column 3 and the steel pads 5, the rectangular connecting plates 4 and the wind-resistant column 3 are fixedly connected together. This allows the horizontal wind load acting on the roof to be directly transmitted through the shear of the bolt I6 passing through the circular hole 41 at the top of the connecting plate 4 and the through hole at the bottom of the node end plate 2; while when the roof, i.e. the roof rigid beam 1, is vertically displaced, it is released by the bolt II7 sliding relative to the web of the wind-resistant column 3 in the elongated hole 42 at the bottom of the connecting plate 4, so as to avoid stress concentration in the components due to node constraints.

[0030] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A connection node structure of a wind-resistant column at the ridge of a gabled frame, comprising a roof girder (1), a node end plate (2), and a wind-resistant column (3). The node end plate (2) is fixedly connected to the node end face of the roof girder (1). Two roof girders (1) are fixedly connected to each other through the corresponding node end plates (2) to form a "human" shape. The wind-resistant column (3) is vertically arranged below the ridge of the two roof girders (1) and its top end is fixedly connected to the node end plate (2). characterized in that It further includes a connecting plate (4) and a steel backing plate (5). The upper part of the connecting plate (4) is connected to the node end plate (2) by bolts I (6), and the lower part is connected to the web of the wind-resistant column (3) by bolts II (7). The steel backing plate (5) is arranged between the connecting plate (4) and the web of the wind-resistant column (3) and is fixed by being penetrated by bolts II (7).

2. The wind column connection node configuration at the ridge of the portal frame according to claim 1, characterized in that: The upper part of the connecting plate (4) is provided with at least two round holes (41) through which bolts I (6) can pass, and the lower part is provided with at least two oblong holes (42) extending vertically and through which bolts II (7) can pass.

3. The wind-resistant column connection node structure at the ridge of the portal frame roof according to claim 2, characterized in that: At least the lower end of the node end plate (2) extends out of the lower surface of the connected roof girder (1). A rib plate (21) fixedly connected to the lower surface of the roof girder (1) is arranged on one side of the lower end of the node end plate (2) close to the extending direction of the connected roof girder (1). A relief groove (43) into which the rib plate (21) can be inserted is arranged on the upper part of the connecting plate (4).

4. The wind-resistant column connection node structure at the ridge of the portal frame roof according to claim 2, characterized in that: The thickness of the steel backing plate (5) is the thickness of the node end plate (2) minus half of the thickness of the web of the wind-resistant column (3) plus or minus 0.2 mm.

5. The wind-resistant column connection node structure at the ridge of the portal frame roof according to claim 2, characterized in that: The steel backing plate (5) is movably arranged between the connecting plate (4) and the web of the wind-resistant column (3), or is fillet-welded at the corresponding position of the web of the wind-resistant column (3). Through holes through which bolts II (7) can pass are respectively formed on the steel backing plate (5) and the web of the wind-resistant column (3).

6. The wind-resistant column connection node structure at the ridge of the portal frame roof according to claim 2, characterized in that: The top end of the connecting plate (4) abuts against the lower surface of the corresponding roof girder (1), and the lower part of the connecting plate (4) is connected to the web of the wind-resistant column (3) by bolts II (7) penetrating through the middle of the oblong holes (42).

7. The wind-resistant column connection node structure at the ridge of the portal frame roof according to any one of claims 2 to 6, characterized in that: The connecting plate (4) and the steel backing plate (5) are respectively arranged on both sides of the web of the wind-resistant column (3). The top end of the fixed steel backing plate (5) is not higher than the top end of the web of the wind-resistant column (3). A gap is arranged between the bottom end of the node end plate (2) and the top end of the web of the wind-resistant column (3).

8. The wind-resistant column connection node structure at the ridge of the portal frame roof according to claim 7, characterized in that: A longitudinally extending roof longitudinal tie rod (8) is fixedly connected to the side surface of the node end plate (2), and an obliquely extending roof diagonal brace (9) is fixedly connected to the flange or web of the roof girder (1).

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