Composite steel beam
Patent Information
- Application Number
- CN202521746209.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-08-18
AI Technical Summary
[0002]电站锅炉或相关工业设备的支撑梁，根据所支吊设备的荷载能力，一般设置为H型梁，通常H型梁因制造和焊接更容易而较多使用，但随着荷载的增加，常规的H型梁设计若要满足强度、刚度以及稳定性的需求，则需要加高，即增加翼缘板的宽度和厚度，但是会使成本大幅增加，并且给运输和施工吊装都带来了极大的困难
[0007]本实用新型的有益效果是：通过对H型钢梁进行厂内预上拱处理，并且使上翼缘板和下翼缘板的强度高于腹板，从而使得H型钢梁在保证了强度的同时，减轻了重量，保证了H型钢梁的经济性，并使得其更便于运输以及施工吊装。
Smart Images
Figure CN224813376U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel beam structure technology, specifically to a pre-arched composite steel beam. Background Technology
[0002] The support beams for power plant boilers or related industrial equipment are generally designed as H-beams, depending on the load capacity of the equipment being supported. H-beams are commonly used because they are easier to manufacture and weld. However, as the load increases, the conventional H-beam design needs to be heightened to meet the requirements of strength, stiffness, and stability. This requires increasing the width and thickness of the flange plates, which significantly increases the cost and brings great difficulties to transportation and construction hoisting. Utility Model Content
[0003] In order to improve the economy of existing H-beams and make them easier to transport and install during construction, this utility model proposes a composite steel beam.
[0004] Composite steel beams, including H-beams, are composed of an upper flange plate, a lower flange plate, and a web plate sandwiched therebetween. The yield strength of the upper flange plate and the lower flange plate is higher than that of the web plate. The H-beams are pre-arched.
[0005] The aforementioned composite steel beam uses Q460 steel for the upper and lower flange plates and Q355 steel for the web plate. Under the same stress conditions, the width of the upper and lower flange plates is reduced to 0.697 to 0.792 times the width when Q355 steel is used for the upper and lower flange plates.
[0006] Under the same stress conditions, the pre-camber value of the above-mentioned composite steel beams is 0.214 to 0.344 times the allowable deflection value of composite steel beams of the same size using Q355 steel.
[0007] The beneficial effects of this utility model are: by pre-arching the H-beam in the factory and making the strength of the upper and lower flange plates higher than that of the web plate, the H-beam can reduce its weight while ensuring its strength, thus ensuring the economy of the H-beam and making it easier to transport and hoist during construction. Attached Figure Description
[0008] Figure 1 This is a schematic cross-sectional view of the composite steel beam of this utility model.
[0009] Figure 2 This is a side view of the composite steel beam of this utility model.
[0010] The markings in the diagram are: 1-upper flange, 2-lower flange, 3-web. Detailed Implementation
[0011] The present invention will now be described in conjunction with the accompanying drawings.
[0012] like Figure 1-2 As shown in this embodiment, a composite steel beam includes an H-shaped steel beam, which is composed of an upper flange plate 1, a lower flange plate 2, and a web plate 3 sandwiched therebetween. The yield strength of the upper flange plate 1 and the lower flange plate 2 is higher than that of the web plate 3. This ensures the strength of the upper flange plate 1 and the lower flange plate 2 while appropriately reducing their thickness and width. Furthermore, the H-shaped steel beam is pre-arched, which solves the problem of reduced width and thickness of the upper flange plate 1 and the lower flange plate 2 due to weight reduction, thereby reducing the beam's cross-sectional moment of inertia and deflection.
[0013]
[0014] Table 1 Design Selection Reference Table
[0015] Furthermore, as shown in Table 1, the upper flange plate 1 and the lower flange plate 2 are made of Q460 steel, and the web plate 3 is made of Q355 steel. Under the condition that the composite steel beam described in this embodiment uses the above-mentioned high-strength steel and the stress conditions are the same, it can be calculated that the width of the upper flange plate 1 and the lower flange plate 2, which are limited to using Q460 steel, is reduced to 0.697 to 0.792 times that when using Q355 steel. Under the composite steel beam structure under the above conditions, the same load-bearing capacity can be guaranteed while the weight of the flange plate is reduced by 20.8% to 30.3%, which can generate better economic benefits.
[0016]
[0017] Table 2 Reference Table for Pre-arch Values of Cross Sections
[0018] Furthermore, as shown in Table 2, based on the flange thicknesses of the upper flange plate 1 and the lower flange plate 2, it can be determined from the beam span and allowable relative deflection that, under the same conditions, the pre-camber value of the H-beam is 0.214 to 0.344 times the allowable deflection value of the composite steel beam using Q355 steel of the same size. This can improve the stiffness of the composite section and ensure that the deflection meets the requirements.
[0019] The composite steel beam described in this embodiment, referring to the design selection reference table in Table 1, shows the reduction ratio of the width of the upper flange plate 1 and the lower flange plate 2 after using Q460 steel, based on the flange thickness. The table shows that when the flange thickness of the upper flange plate 1 and the lower flange plate 2 is less than 16mm, the reduction ratio is at least 0.697 times, equivalent to a maximum weight reduction of 30.3% for the flanges. When the flange thickness is greater than 63mm and less than or equal to 80mm, the flange width reduction... The minimum ratio is 0.792 times, which is equivalent to a minimum weight reduction of 20.8% for the flange. Referring to the pre-camber reference table in Table 2, the required pre-camber values for upper flange plate 1 and lower flange plate 2 with different flange thicknesses can be obtained according to the flange thickness. When the flange thickness is greater than 63mm and less than or equal to 80mm, the minimum pre-camber value is 0.214 times the allowable deflection value. When the flange thickness is less than or equal to 16mm, the maximum pre-camber value is 0.344 times the allowable deflection value.
[0020] Compared with the prior art, the composite steel beam of this utility model adopts a structure in which the upper and lower flange plates have higher strength than the web plate, and at the same time, it is pre-arched in the factory to ensure its strength, reduce its weight, improve its economy, and make it easier to transport and hoist during construction.
Claims
1. A composite steel beam, including an H-beam, said H-beam being composed of an upper flange plate (1), a lower flange plate (2), and a web plate (3) sandwiched therebetween, characterized in that: The yield strength of the upper flange plate (1) and the lower flange plate (2) is higher than the yield strength of the web plate (3), and the H-shaped steel beam is pre-arched.
2. The composite steel beam according to claim 1, characterized in that: The upper flange plate (1) and the lower flange plate (2) are made of Q460 steel, and the web plate (3) is made of Q355 steel. Under the same stress conditions, the width of the upper flange plate (1) and the lower flange plate (2) is reduced to 0.697 to 0.792 times the width when the upper flange plate (1) and the lower flange plate (2) are made of Q355 steel.
3. The composite steel beam according to claim 2, characterized in that: Under the same stress conditions, the pre-camber value of the H-beam is 0.214 to 0.344 times the allowable deflection value of an H-beam of the same size using Q355 steel.