Steel beam and steel beam hinged connection structure

Abstract

The utility model discloses a steel beam and steel beam hinged connecting structure, including main steel beam, secondary steel beam, main connecting plate, vice connecting plate, main steel beam and secondary steel beam are all I -beam, the end face of secondary steel beam is towards the web of main steel beam, and the main connecting plate and vice connecting plate are welded in the side of the web of main steel beam facing secondary steel beam, and the part of vice connecting plate exceeding the flange of main steel beam is connected with the web of secondary steel beam through mounting bolt, and the side of the web of main steel beam facing away from secondary steel beam is provided with stiffening rib. Through the optimization setting of cooperation and use of main connecting plate and vice connecting plate, the disadvantage of large on -the -spot welding operation amount is avoided, and at the same time, through the setting of vice connecting plate, the on -the -spot construction installation profession is facilitated, the hinged joint connecting strength is increased, and the structure safety and reliability at the connecting joint are guaranteed to the maximum.

Description

Technical Field

[0001] This utility model relates to the field of building steel structure engineering technology, specifically to a steel beam hinged connection structure. Background Technology

[0002] In the field of steel structure engineering, there are generally two assumed connection methods between steel structure components: rigid connection and hinged connection. For the connection between primary and secondary beams in steel structures, since I-beams are commonly used in steel structure engineering, and this type of beam has poor torsional resistance, hinged connections are mostly adopted. This means that at the connection node between the secondary beam and the primary beam, shear force is transferred only through the web of the secondary beam to the primary beam, forming an ideal hinge point. Therefore, how to reliably connect the web of the secondary beam to the primary beam to form an ideal hinge point is a difficult problem in engineering. It is necessary to ensure the reliability of the web connection while also facilitating on-site construction and reducing installation difficulty. Currently, the industry commonly uses the following two types of hinged connection methods for primary and secondary beams.

[0003] Method 1, plate welding connection, is a common connection method for steel beams with a height greater than 200mm. By controlling the thickness of the connecting plate and the weld size, a web-equal strength connection can be achieved, requiring no calculations and simplifying the design. However, with the development of steel structure installation engineering technology in recent years, some drawbacks of this hinged connection method have gradually become apparent. This connection method requires the secondary beam web to extend into the main beam to reduce torque at the joint. Currently, on construction sites, the main frame beam is often installed first. After the main frame beam is installed, the secondary beam, because it has a longer space between the two flanges of the main beam, and the connecting plate at the joint is already provided at the factory, cannot be inserted into the main beam by rotation or other means, causing significant inconvenience to on-site installation. Furthermore, because the additional connecting plate is welded on-site using fillet welds, the welding quality cannot be guaranteed. In projects, there have been multiple instances of cracking and deformation of the connecting plate weld at the hinged connection joint, ultimately leading to failure.

[0004] Method two, high-strength bolt connection, uses high-strength bolts to connect the web of the steel beam to form a hinged connection node. This method is recommended by civil engineering design institutes and standard drawings. While this is a relatively reliable and ideal hinged connection point, in the field of metallurgical steel structure engineering, steel beams have many cross-sectional dimensions, and most structures are steel structures. If high-strength bolt connections are used, extensive calculations are required in the design. For each component of various sizes, based on the stress conditions, the type and quantity of high-strength bolts at the node must be calculated, causing significant inconvenience in the design process.

[0005] Given the current state of the industry and the technological background, designing a steel beam-to-steel beam hinged connection structure that is easy to construct and has reliable connections is of paramount importance in the field of building steel structure engineering technology. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a steel beam-to-steel beam hinged connection structure, which can reduce the amount of on-site welding, reduce construction difficulty, and ensure the quality and reliability of on-site installation.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: This utility model provides a steel beam hinged connection structure, including a main steel beam, a secondary steel beam, a main connecting plate, and a secondary connecting plate, wherein both the main steel beam and the secondary steel beam are I-beams; The end face of the secondary steel beam faces the web of the main steel beam. The main connecting plate and the auxiliary connecting plate are welded to the side of the web of the main steel beam facing the secondary steel beam. The main connecting plate and the auxiliary connecting plate form a surface contact and are both parallel to the web of the secondary beam. The outer side of the main connecting plate is flush with the flange of the main steel beam of the same width. The outer side of the secondary connecting plate extends beyond the flange of the main steel beam, and the portion of the secondary connecting plate extending beyond the flange of the main steel beam is connected to the web of the secondary steel beam by mounting bolts. Stiffening ribs are provided on the side of the web of the main steel beam facing away from the secondary steel beam.

[0008] Preferably, the thickness of the main connecting plate, the secondary connecting plate, and the web of the secondary steel beam are equal.

[0009] Furthermore, the main connecting plate is welded to the main steel beam on both sides using double-sided fillet welds or three-sided welding.

[0010] Furthermore, the auxiliary connecting plate is welded to the web of the main steel beam using a single-sided fillet weld.

[0011] Furthermore, the outer side of the auxiliary connecting plate extends 95mm beyond the flange of the main steel beam, and the spacing between the mounting bolts is ≤300mm.

[0012] Furthermore, the distance between the two ends of the secondary connecting plate and the flange of the secondary steel beam shall not exceed 10mm.

[0013] Preferably, the stiffening ribs are welded to the main steel beam on three sides, and the outer side of the stiffening ribs is flush with the flange of the main steel beam. This utility model has the following beneficial effects: This utility model avoids the drawback of large on-site welding work through the optimized setting of the main connecting plate and the auxiliary connecting plate. At the same time, the setting of the auxiliary connecting plate facilitates on-site construction and installation, increases the connection strength of the hinged node, and ensures the structural safety and reliability of the connection node to the maximum extent. Attached Figure Description

[0014] Figure 1 This is a front view of the connection between the main steel beam and the secondary steel beam in an embodiment of this utility model; Figure 2 It is along Figure 1 A cross-sectional view along line AA in the middle.

[0015] Labeling Explanation: 1. Main steel beam (connected beam); 2. Secondary steel beam (connecting beam); 3. Main connecting plate; 4. Stiffening rib; 5. Secondary connecting plate; 6. Mounting bolt. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0018] like Figures 1 to 2 As shown in the figure, this embodiment discloses a hinged connection structure between steel beams, including a main steel beam, a secondary steel beam, a main connecting plate, and a secondary connecting plate. Both the main steel beam and the secondary steel beam are I-beams. The end face of the secondary steel beam faces the web of the main steel beam. The main connecting plate and the secondary connecting plate are welded to the side of the web of the main steel beam facing the secondary steel beam. The main connecting plate and the secondary connecting plate form surface contact and are both parallel to the web of the secondary beam. The outer side of the main connecting plate is flush with the flange of the main steel beam of equal width. The outer side of the secondary connecting plate extends beyond the flange of the main steel beam. The part of the secondary connecting plate that extends beyond the flange of the main steel beam is connected to the web of the secondary steel beam by mounting bolts. Stiffening ribs are provided on the side of the web of the main steel beam facing away from the secondary steel beam.

[0019] Preferably, the main connecting plate, the secondary connecting plate, and the web of the secondary steel beam are all of equal thickness. Preferably, the stiffening ribs are welded to the main steel beam on three sides, and the outer sides of the stiffening ribs are flush with and of equal width to the flanges of the main steel beam. In the specific structure, the main connecting plate is welded to the main steel beam using double-sided fillet welds or three-sided welding. The secondary connecting plate is welded to the web of the main steel beam using single-sided fillet welds. The outer side of the secondary connecting plate extends 95mm beyond the flange of the main steel beam, and the spacing between the mounting bolts is ≤300mm. The distance between the two ends of the secondary connecting plate and the flange of the secondary steel beam is no greater than 10mm.

[0020] See Figure 1 A main connecting plate is installed on the connecting side of the main steel beam (the side facing the secondary steel beam). Preferably, the thickness of the main connecting plate is the same as the thickness of the web of the secondary steel beam being connected, so as to achieve the purpose of equal strength connection of the web. The outer side of the main connecting plate (the side facing away from the web of the main steel beam) is flush with the flange of the main steel beam. The main connecting plate can be welded to the main steel beam on three sides in the form of double-sided fillet welds or slits, depending on its thickness and engineering experience.

[0021] A secondary connecting plate is installed on the connection side of the main steel beam. The length of the secondary connecting plate extends approximately 95mm beyond the flange of the main steel beam, and the width of the secondary connecting plate is controlled within 10mm of the inner edge of the secondary steel beam flange. The secondary connecting plate is as follows: Figure 1 As shown by the dashed line, the thickness of the secondary connecting plate is the same as that of the secondary steel beam web, and it is connected to the main steel beam web using a single-sided fillet weld. This secondary connecting plate serves three main functions: firstly, it houses the mounting bolts, facilitating installation and fixing of the secondary steel beam on-site and simplifying subsequent welding operations; secondly, it acts as a welding backing plate for on-site beveling and penetration welding of the web, ensuring welding quality; and finally, the outer side of the secondary connecting plate is welded to the secondary steel beam web, providing another layer of protection to improve the strength and reliability of the connection joint.

[0022] Subsequently, stiffening ribs are installed on the side of the main steel beam web facing away from the secondary steel beam. These stiffening ribs can be made of Q235B steel plates with a thickness t ≥ 8mm. The outer side of the stiffening rib (the side facing away from the main steel beam web) is flush with the flange of the main steel beam and is welded to the main steel beam on three sides. The stiffening ribs ensure the stability and strength of the main steel beam web under concentrated loads.

[0023] After the secondary steel beam is hoisted into place, it is installed and positioned using mounting bolts. M16 ordinary bolts are used for the mounting, and the number of bolts can be set according to the height H of the secondary steel beam. Generally, the spacing between the mounting bolts should be ≤300mm.

[0024] Finally, single-sided slit-penetration welding is used to weld the secondary beam web to the main connecting plate in the field, achieving a connection of equal strength between the webs. A single-sided fillet weld is then used to weld the secondary connecting plate to the secondary beam web; the weld height hf is determined based on the web thickness, forming a second layer of connection and increasing the reliability of the in-field welded connection. This completes the hinged connection node between the steel beams. It should be noted that this hinged connection method or node is mainly used when the steel beam section height H ≥ 200 mm. For steel beams with smaller section heights, a single node plate welded connection is sufficient.

[0025] This hinged connection minimizes the amount of on-site welding, reduces construction difficulty, and ensures the quality and reliability of on-site installation. Simultaneously, the shear force is transferred through a strong connection via the web, preventing eccentric torque caused by the secondary beam's inability to extend into the main steel beam, thus forming an ideal hinged connection. The secondary connecting plate ensures the quality of on-site web welding, provides mounting bolt positions, facilitates on-site installation, and its welding to the secondary beam web further enhances the connection strength and reliability, minimizing the risk of hinged connection failure.

[0026] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A hinged connection structure between steel beams, characterized in that, It includes main steel beams, secondary steel beams, main connecting plates, and auxiliary connecting plates. Both the main steel beams and secondary steel beams are I-beams. The end face of the secondary steel beam faces the web of the main steel beam. The main connecting plate and the secondary connecting plate are welded to the side of the main steel beam web facing the secondary steel beam. The main connecting plate and the secondary connecting plate form a surface contact and are both parallel to the web of the secondary beam. The outer side of the main connecting plate is flush with the flange of the main steel beam of the same width. The outer side of the secondary connecting plate extends beyond the flange of the main steel beam, and the portion of the secondary connecting plate extending beyond the flange of the main steel beam is connected to the web of the secondary steel beam by mounting bolts. Stiffening ribs are provided on the side of the web of the main steel beam facing away from the secondary steel beam.

2. The steel beam-to-steel beam hinged connection structure according to claim 1, characterized in that, The main connecting plate, the secondary connecting plate, and the web of the secondary steel beam are all of equal thickness.

3. The steel beam-to-steel beam hinged connection structure according to claim 1, characterized in that, The main connecting plate is attached to the main steel beam by double-sided fillet welds or three-sided welding.

4. The steel beam-to-steel beam hinged connection structure according to claim 1, characterized in that, The auxiliary connecting plate is welded to the web of the main beam using a single-sided fillet weld.

5. The steel beam-to-steel beam hinged connection structure according to claim 1, characterized in that, The outer side of the auxiliary connecting plate extends 95mm beyond the flange of the main steel beam, and the spacing between the mounting bolts is ≤300mm.

6. The steel beam-to-steel beam hinged connection structure according to claim 1, characterized in that, The distance between the two ends of the secondary connecting plate and the flange of the secondary steel beam shall not exceed 10mm.

7. The steel beam-to-steel beam hinged connection structure according to claim 1, characterized in that, The stiffening ribs are welded to the main steel beam on three sides, and the outer side of the stiffening ribs is flush with the flange of the main steel beam.

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