Reinforcement device and construction method for cover plate connection nodes of portal steel frame column end plates

Abstract

A cover plate reinforcement device and construction method for the end plate connection node of a portal steel frame beam, relating to the field of building construction. The cover plate reinforcement device for the end plate connection node of the portal steel frame beam includes a steel column with a supporting frame connected to both ends at the top, a roof steel frame beam with positioning plates at both ends, and multiple connectors. At least one sliding groove and at least one engaging groove are respectively opened on the end faces of the steel column. The positioning plates are provided with sliding strips and engaging hooks corresponding to the sliding grooves and engaging grooves, and a second connecting hole corresponding to a first connecting hole opened at one end of the steel column. Connectors are used to connect the positioning plates and the steel column through the first connecting hole and the corresponding second connecting hole. The positioning plates can be inserted into and connected to the supporting frame, so that the sliding strips and engaging hooks engage with the corresponding sliding grooves and engaging grooves, and the second connecting hole on the positioning plate aligns with the corresponding first connecting hole. This application has the advantages of stable installation, accurate positioning, high structural rigidity, and good deformation resistance.

Description

Technical Field

[0001] This application relates to the field of building construction, and more specifically, to a cover plate reinforcement device and construction method for the connection node of the end plate of a portal steel frame beam column. Background Technology

[0002] Portal frame structures are widely used in large-span buildings such as industrial plants, warehousing and logistics facilities, and stadiums due to their advantages of fast construction speed, economical cost, and high space utilization. As a key load-bearing component in a portal frame structure, the beam-column connection performance directly affects the overall structure's load-bearing capacity and safety.

[0003] Currently, the most common method for connecting portal steel frame beams and columns is end plate connection, which involves installing end plates at the beam and column ends and fixing them together with high-strength bolts. However, in actual engineering applications and long-term use, existing end plate connection nodes still have the following shortcomings: First: Installation and positioning are difficult. When hoisting and connecting beams and columns on the construction site, the alignment accuracy of the beam end and column end is required to be high. Traditional connection methods lack effective guidance and temporary fixing structures, and often require multiple adjustments to achieve accurate alignment. This results in low installation efficiency and is prone to uneven stress on the nodes due to installation deviations.

[0004] Second: Insufficient node stiffness. Under vertical loads, the self-weight of the roof steel frame beam and external loads can easily cause bending moments and shear forces at the connection nodes. The existing end plate connection nodes rely solely on bolts to provide fastening force, which has limited bending stiffness and shear resistance. After long-term use, nodes are prone to loosening, deformation, or even fatigue failure.

[0005] Third: Poor resistance to deformation. Due to the large span of the roof steel frame beams, the downward tendency caused by the weight of the beams will be transmitted to the connection nodes, resulting in angular displacement at the beam-column connection, affecting the overall stability of the structure. In severe cases, it may cause problems such as roof system leakage and enclosure structure deformation.

[0006] Therefore, developing a portal steel frame beam column end plate connection reinforcement device and construction method that can achieve rapid and accurate positioning, improve node connection stiffness, effectively resist deformation, and is easy to construct has important engineering application value. Summary of the Invention

[0007] The purpose of this application is to provide a cover plate reinforcement device and construction method for the connection node of the end plate of the portal steel frame beam and column, which solves the problem of difficulty in quickly and accurately aligning the roof steel frame beam and steel column in the early stage of installation. It has the advantages of stable installation process, accurate positioning and tight connection, and can also effectively improve the structural stiffness and deformation resistance of the node.

[0008] This application is implemented as follows: This application provides a cover plate reinforcement device for the end plate connection node of a portal steel frame beam, comprising: The steel column has a supporting frame connected to both ends of the top. At least one sliding groove and at least one engaging groove are opened on the end face of each end of the steel column. Multiple first connecting holes are provided at each end of the steel column. Two roof steel frame beams are respectively connected to positioning plates at their ends. The positioning plates are provided with sliding strips and locking hooks that correspond to the sliding slots and locking slots opened at one end of the steel column. The positioning plates are also provided with second connecting holes that correspond to the first connecting holes opened at one end of the steel column. Multiple connectors are used to connect the positioning plate and the steel column by passing through a first connecting hole and a corresponding second connecting hole in sequence. The positioning plate is configured to be inserted from top to bottom and connected to a supporting frame to connect the corresponding roof steel frame beam to one end of the steel column, so that the sliding strip and the locking hook plate are engaged with the corresponding sliding groove and locking groove, and the second connecting hole on the positioning plate is aligned with the corresponding first connecting hole.

[0009] In some alternative implementations, the support frame has a support base plate at the bottom, a connector strip at the top of the support base plate, and a positioning slot at the bottom of the positioning plate; when the positioning plate is inserted into and connected to a support frame from top to bottom, the connector strip is inserted into the corresponding positioning slot.

[0010] In some alternative implementations, multiple bent plates are provided on both sides of the support frame; when the positioning plate is inserted into and connected to a support frame from top to bottom, the bent plates on both sides of the support frame are respectively attached to the steel column and the corresponding positioning plate.

[0011] In some alternative implementations, stiffening plates are connected to the top two sides of the steel column, and the two ends of the two stiffening plates are connected to the two roof steel frame beams by reinforcement mechanisms.

[0012] In some alternative implementations, the reinforcement mechanism includes: One locking hole is located on the stiffening plate; The second slot is located on the steel frame beam of the roof. Two locking rods are inserted into locking hole one and locking hole two respectively; Two connecting rods, one end of which is connected to two locking rods respectively; Two threaded rods, one end of which is connected to the other end of the two connecting rods via threads; The threaded tube is threaded at both ends and attached to the other end of two threaded rods.

[0013] In some alternative implementations, the reinforcement mechanism also includes limiting plates connected to the two connecting rods respectively, the limiting plates being used to press against and define the position of one end of the threaded rod.

[0014] In some alternative implementations, the reinforcement mechanism also includes a retaining ring fitted onto the threaded tube, the retaining ring being connected to a retaining post for pressing against the outer wall of the support frame.

[0015] In some alternative implementations, at least one reinforcing rib connects the roof steel frame beam and the positioning plate.

[0016] This application also provides a construction method for the cover plate reinforcement device of the above-mentioned portal steel frame beam column end plate connection node, including the following steps: Hoist the roof steel frame beam to the top of the steel column, insert the positioning plate from top to bottom and connect it to a supporting frame, connect the corresponding roof steel frame beam to one end of the steel column, and make the sliding clip and the locking hook plate engage with the corresponding sliding groove and locking groove, and align the second connecting hole on the positioning plate with the corresponding first connecting hole. The connector is passed through a first connecting hole and a corresponding second connecting hole in sequence to connect the positioning plate and the steel column.

[0017] In some alternative implementations, the following steps are also included: connecting reinforcement mechanisms between the two ends of the stiffening plates on both sides of the top of the steel column and the two roof steel frame beams respectively, and using the reinforcement mechanisms to connect and tighten the stiffening plates and the corresponding roof steel frame beams.

[0018] The beneficial effects of this application are as follows: The cover plate reinforcement device and construction method for the connection node of the portal steel frame beam column end plate provided in this application connect the steel column and the roof steel frame beam by sliding and inserting them through the supporting frame and the positioning plate, and then connecting them with connectors. The sliding strip and the locking hook plate on the positioning plate are locked into the sliding groove and locking groove on the corresponding steel column end face. This solves the problem that it is difficult to quickly and accurately align the roof steel frame beam and the steel column in the early stage of installation. It has the advantages of stable installation process, accurate positioning and tight connection. At the same time, it can also effectively improve the structural stiffness and deformation resistance of the node. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the cover plate reinforcement device for the end plate connection node of the portal steel frame beam provided in the embodiment of this application; Figure 2 A schematic diagram of the connection between the steel column and the supporting frame in the cover plate reinforcement device for the column end plate connection node of the portal steel frame beam provided in the embodiment of this application; Figure 3A schematic diagram of the structure of the portal steel frame beam column end plate connection node reinforcement device provided in this application embodiment, where one end of the supporting frame bent plate is bent while the other end of the bent plate is not bent. Figure 4 A schematic diagram of the connection between the roof steel frame beam and the positioning plate in the cover plate reinforcement device for the portal steel frame beam column end plate connection node provided in the embodiment of this application; Figure 5 A schematic diagram of the positioning plate in the cover plate reinforcement device for the end plate connection node of the portal steel frame beam provided in the embodiment of this application; Figure 6 for Figure 5 A magnified schematic diagram of the partial structure at point A in the middle; Figure 7 A schematic diagram of the reinforcement mechanism in the cover plate reinforcement device for the end plate connection node of the portal steel frame beam provided in the embodiment of this application; Figure 8 A partial cross-sectional view of the reinforcing mechanism in the cover plate reinforcement device for the portal steel frame beam column end plate connection node provided in this application embodiment, when the reinforcement mechanism is connected to the stiffening plate and the roof steel frame beam; Figure 9 for Figure 8 A magnified cross-sectional view of the structure at point B in the middle.

[0021] In the diagram: 100, steel column; 110, supporting frame; 120, sliding groove; 130, engaging groove; 140, first connecting hole; 150, supporting base plate; 160, plug-in strip; 170, bent plate; 180, stiffening plate; 190, first locking hole; 200, roof steel frame beam; 210, positioning plate; 220, sliding strip; 230, engaging hook plate; 240, second connecting hole; 250, positioning slot; 260, second locking hole; 270, reinforcing rib; 300, connector; 400, reinforcement mechanism; 410, locking rod; 420, connecting rod; 430, threaded rod; 440, threaded pipe; 450, limiting plate; 460, fixing ring; 470, fixing column. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The following describes in further detail the features and performance of the cover plate reinforcement device and construction method for the column end plate connection node of the portal steel frame beam of this application, with reference to the embodiments.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown in the embodiment of this application, a cover plate reinforcement device for the connection node of the end plate of a portal steel frame beam is provided. It includes an I-shaped steel column 100, two U-shaped supporting frames 110, two I-shaped roof steel frame beams 200, eight connectors 300, and four reinforcement mechanisms 400. The two supporting frames 110 are respectively connected to the top two ends of the steel column 100. Three spaced sliding grooves 120 are respectively opened on the end faces of both ends of the steel column 100. The top and bottom of each sliding groove 120 penetrate the top and bottom surfaces of the steel column 100, respectively. Two engaging grooves 130 are respectively opened on the top surfaces of both ends of the steel column 100. A connection is provided between two adjacent sliding grooves 120 on one end face of the steel column 100. A locking groove 130 is provided; four first connecting holes 140 are respectively provided on the top two end faces of the steel column 100; a supporting base plate 150 is provided at the bottom of the supporting frame 110, and a plug-in strip 160 is provided on the top of the supporting base plate 150; four bending plates 170 are respectively provided on both sides of both ends of the supporting frame 110; stiffening plates 180 are respectively connected to the top two sides of the steel column 100, and a locking hole 190 is opened at both ends of each stiffening plate 180; in this embodiment, each connector 300 is a connecting bolt and a nut connected to the connecting bolt; the connecting bolt of each connector 300 is used to pass through a first connecting hole 140 and a corresponding second connecting hole 240 in sequence and then connect the nut to connect the positioning plate 210 and the steel column 100; Each roof steel frame beam 200 has a positioning plate 210 connected to one end. The side of the positioning plate 210 away from the corresponding roof steel frame beam 200 has three spaced sliding strips 220. The top and bottom of each sliding strip 220 extend to be flush with the top and bottom surfaces of the positioning plate 210, respectively. Two L-shaped locking hooks 230 are connected to the top of the side of the positioning plate 210 away from the corresponding roof steel frame beam 200. The sliding strips 220 and locking hooks 230 on the side of the positioning plate 210 are connected to the steel column 1. The sliding groove 120 and engaging groove 130 on the top surface of one end of the steel column 100 correspond one-to-one. The positioning plate 210 has four second connecting holes 240 that correspond one-to-one with the first connecting holes 140 opened at one end of the steel column 100. The bottom of the positioning plate 210 has a positioning slot 250 that corresponds to the insert strip 160. The two roof steel frame beams 200 are connected to the positioning plate 210 at one end and each side has a locking hole 260. Seven spaced reinforcing ribs 270 are connected between the roof steel frame beams 200 and the positioning plate 210. The positioning plate 210 can be inserted from top to bottom and connected to a supporting frame 110 to connect the corresponding roof steel frame beam 200 to one end of the steel column 100. The sliding clip 220 and the engaging hook plate 230 are respectively engaged in the corresponding sliding slot 120 and engaging slot 130, and the insertion strip 160 is inserted into the corresponding positioning slot 250. The second connecting holes 240 on the positioning plate 210 are aligned with the corresponding first connecting holes 140. When the positioning plate 210 is inserted from top to bottom and connected to the supporting frame 110, the bent plates 170 on both sides of the supporting frame 110 respectively adhere to the steel column 100 and the sides of the corresponding positioning plate 210.

[0031] Two stiffening plates 180 are connected at both ends to a reinforcement mechanism 400 between the two sides of the two roof steel frame beams 200. Each reinforcement mechanism 400 includes two clamping rods 410, two connecting rods 420, two threaded rods 430, a threaded tube 440, two limiting plates 450, and a fixing ring 460. The two clamping rods 410 are respectively inserted into clamping holes 190 and clamping holes 260. One end of each of the two connecting rods 420 is connected to the two clamping rods 410. One end of each of the two threaded rods 430 is threaded to the other end of each connecting rod 420, and the other end is threaded to both ends of the threaded tube 440. The two limiting plates 450 are respectively connected to the two connecting rods 420 to press against and limit the position of one end of the threaded rod 430. The fixing ring 460 is sleeved on the threaded tube 440 and is connected to a fixing column 470 for pressing against and supporting the outer wall of the frame 110.

[0032] This application embodiment also provides a construction method for the cover plate reinforcement device of the above-mentioned portal steel frame beam column end plate connection node, including the following steps: Step 1: Prefabrication and Inspection: Prefabricate steel columns 100, supporting frames 110, roof steel frame beams 200, connectors 300, and reinforcing mechanisms 400 in the factory or on the construction site, ensuring that stiffening plates 180, sliding slots 120, locking slots 130, connectors 300, and locking holes 190 are welded or processed in place according to design requirements; at the same time, check whether the positioning plates 210, sliding strips 220, locking hooks 230, reinforcing ribs 270, and locking holes 260 on the roof steel frame beams 200 are intact to ensure installation accuracy; Step 2, Preliminary Insertion and Positioning: Hoist the roof steel frame beam 200 to the top of the steel column 100, align the bottom of the positioning plate 210 with the top opening of the supporting frame 110, insert the positioning plate 210 from top to bottom and connect it to the supporting frame 110, so that the sliding clip 220 and the locking hook plate 230 are respectively locked into the corresponding sliding slot 120 and locking slot 130, and align each of the second connecting holes 240 on the positioning plate 210 with the corresponding first connecting holes 140, so as to achieve the preliminary locking and positioning of the roof steel frame beam 200 and the steel column 100; Step 3, Precise alignment and clamp fixation: After the roof steel frame beam 200 is in place, adjust its position so that the plug strip 160 is inserted into the corresponding positioning slot 250. Then, bend the bending plates 170 on both sides of the supporting frame 110 inwards so that the bending plates 170 on both sides of the supporting frame 110 are tightly attached to the two sides of the steel column 100 and the positioning plate 210, forming a U-shaped clamp structure to enhance the stability of the node connection. Step 4: Mechanical bolt tightening: Pass the connecting bolts of each connector 300 through the first connecting hole 140 reserved at both ends of the top of the steel column 100 and the second connecting hole 240 reserved at the positioning plate 210, and tighten them with the nuts pre-welded to both ends of the steel column 100 to provide reliable mechanical fastening force. Step 5, Installation of Reinforcing Mechanism 400: Insert two clamping rods 410 into the clamping holes 190 of the stiffening plate 180 and 260 of the clamping holes 260 of the roof steel frame beam 200 respectively; then insert one end of the threaded rod 430 into the threaded hole connected to the connecting rod 420 respectively, and connect the limiting piece 450 on the connecting rod 420 to limit the position; then connect the other ends of the two threaded rods 430 to the two ends of the threaded tube 440 respectively, and fit the fixing ring 460 into the middle of the threaded tube 440, so that the fixing column 470 connected to the fixing ring 460 is fixedly pressed against the supporting frame 110; Step Six: Tightening in Opposite Directions and Final Adjustment: Simultaneously rotate the two threaded rods 430 to move them in opposite directions within the threaded tube 440. The threaded rods 430, through the connecting rod 420, drive the clamping rod 410 to tighten the stiffening plate 180 and the top of the roof steel frame beam 200. Thus, the reinforcement mechanism 400 connects and tightens the stiffening plate 180 and the corresponding roof steel frame beam 200. After the installation of each reinforcement mechanism 400 is completed, check whether each connection part is tightly fitted. If necessary, make fine adjustments to ensure that the overall node is firm and reliable, and complete the reinforcement construction.

[0033] The cover plate reinforcement device and construction method for the portal steel frame beam column end plate connection node provided in this application can solve the problems in the prior art such as difficulty in positioning during the installation process of the portal steel frame beam column end plate connection node, insufficient connection stability, and easy tilting or loosening under long-term load: I. By adopting the sliding insertion structure of the positioning plate 210 and the supporting frame 110, combined with the guiding sliding of the sliding strip 220 and the sliding groove 120, and the locking of the locking hook plate 230 and the locking groove 130, the problem of the roof steel frame beam 200 and the steel column 100 being difficult to quickly and accurately align in the early stage of installation is solved. This achieves the beneficial effects of a stable installation process, accurate positioning, and tight initial connection, providing a good foundation for subsequent fastening. Second, by adopting the vertical positioning structure of the plug strip 160 and the positioning slot 250, and the U-shaped clamp structure formed by bending the bending plate 170, the problem of small contact area and insufficient shear resistance when the node connection is locked by bolts alone is solved, and the technical effect of precise vertical positioning of the connection node, increased contact area, and significantly improved bending and shear resistance is achieved. Third, the mechanical locking structure of nuts and bolts with 300 connecting parts solves the problem of possible loosening of temporary positioning structures under long-term loads, provides reliable permanent mechanical fastening force for beam-column joints, and achieves the beneficial effects of firm connection, strong load-bearing capacity and high safety performance. Fourth, a reinforcement mechanism 400 is adopted, consisting of a clamping rod 410, a connecting rod 420, a threaded rod 430, a threaded tube 440, a limiting plate 450, a fixing ring 460, and a fixing column 470. The threaded rod 430 drives the clamping rod 410 to tighten the stiffening plate 180 and the top of the roof steel frame beam 200 by screwing the threaded rod 430 in opposite directions inside the threaded tube 440. This solves the problem of sagging or tilting deformation at the joints of the roof steel frame beam 200 caused by its own weight, and achieves the beneficial effects of effectively counteracting the sagging trend of the beam, maintaining the rigidity of the joints, and improving the long-term stability of the structure. The reinforcement mechanism 400 is fixed to the supporting frame 110 by the fixing ring 460, which can improve the connection stability of the reinforcement mechanism 400.

[0034] Fifth, by adopting an integrated design that fixes the reinforcement mechanism 400 to the support frame 110 through the fixing ring 460, and by using the tie method of inserting the clamp rod 410 into the clamp hole 190 and the clamp hole 260 respectively, the problem of complex structure and inconvenient installation of traditional reinforcement measures is solved, and the advantages of compact structure, convenient installation, direct force transmission and significant reinforcement effect are achieved.

[0035] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A cover plate reinforcement device for the end plate connection node of a portal steel frame beam, characterized in that, include: A steel column has a supporting frame connected to both ends of its top. At least one sliding groove and at least one engaging groove are opened on the end face of each end of the steel column. Multiple first connecting holes are provided at each end of the steel column. Two roof steel frame beams are respectively connected to positioning plates at their ends. The positioning plates are provided with sliding strips and locking hooks that correspond one-to-one with the sliding slots and locking slots opened at one end of the steel column. The positioning plates are also provided with second connecting holes that correspond one-to-one with the first connecting holes opened at one end of the steel column. Multiple connectors are used to connect the positioning plate and the steel column by passing sequentially through a first connecting hole and a corresponding second connecting hole; The positioning plate is configured to be inserted from top to bottom and connected to a supporting frame to connect the roof steel frame beam to one end of the steel column, so that the sliding strip and the engaging hook plate engage with the corresponding sliding groove and the engaging groove, and the second connecting hole on the positioning plate is aligned with the corresponding first connecting hole.

2. The cover plate reinforcement device for the connection node of the portal steel frame beam and column end plate according to claim 1, characterized in that, The bottom of the support frame is provided with a support base plate, the top of the support base plate is provided with a connector strip, and the bottom of the positioning plate is provided with a positioning slot; when the positioning plate is inserted into the support frame from top to bottom, the connector strip is inserted into the corresponding positioning slot.

3. The cover plate reinforcement device for the connection node of the column end plate of the portal steel frame beam according to claim 1, characterized in that, Multiple bent plates are provided on both sides of the two ends of the supporting frame; when the positioning plate is inserted into and connected to the supporting frame from top to bottom, the bent plates on both sides of the two ends of the supporting frame are respectively attached to the steel column and the corresponding positioning plate.

4. The cover plate reinforcement device for the end plate connection node of the portal steel frame beam according to claim 1, characterized in that, The top two sides of the steel column are respectively connected to stiffening plates, and the two ends of the two stiffening plates are respectively connected to the two roof steel frame beams with reinforcement mechanisms.

5. The cover plate reinforcement device for the connection node of the column end plate of the portal steel frame beam according to claim 4, characterized in that, The reinforcement mechanism includes: A first slot is provided on the stiffening plate; The second locating hole is located on the roof steel frame beam; Two locking rods are respectively inserted into the locking hole one and the locking hole two; Two connecting rods, one end of which is connected to the two clamp rods respectively; Two threaded rods, one end of which is respectively connected to the other end of the two connecting rods by threads; The threaded tube is threaded at both ends and respectively fitted onto the other ends of the two threaded rods.

6. The cover plate reinforcement device for the connection node of the column end plate of the portal steel frame beam according to claim 5, characterized in that, The reinforcement mechanism also includes limiting plates connected to the two connecting rods respectively, the limiting plates being used to press against and limit the position of one end of the threaded rod.

7. The cover plate reinforcement device for the connection node of the column end plate of the portal steel frame beam according to claim 5, characterized in that, The reinforcement mechanism also includes a fixing ring sleeved on the threaded pipe, and the fixing ring is connected to a fixing column for pressing against the outer wall of the supporting frame.

8. The cover plate reinforcement device for the end plate connection node of the portal steel frame beam according to claim 1, characterized in that, At least one reinforcing rib connects the roof steel frame beam and the positioning plate.

9. The construction method of the cover plate reinforcement device for the column end plate connection node of the portal steel frame beam according to any one of claims 1 to 8, characterized in that, Includes the following steps: The roof steel frame beam is hoisted to the top of the steel column, and the positioning plate is inserted from top to bottom and connected to a supporting frame. The roof steel frame beam is connected to one end of the steel column, and the sliding strip and the locking hook plate are locked into the corresponding sliding groove and locking groove. The second connecting hole on the positioning plate is aligned with the corresponding first connecting hole. The connector is passed sequentially through a first connecting hole and a corresponding second connecting hole to connect the positioning plate and the steel column.

10. The construction method of the cover plate reinforcement device for the column end plate connection node of the portal steel frame beam according to claim 9, characterized in that, It also includes the following steps: A reinforcement mechanism is connected between the two ends of the stiffening plate on both sides of the top of the steel column and the two roof steel frame beams, respectively. The reinforcement mechanism is used to connect and tighten the stiffening plate and the corresponding roof steel frame beam.

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