CN-224200137-U - Structure for improving section grade of composite beam

Abstract

The utility model provides an improve structure of combination beam section grade, including girder steel, reinforcement angle steel, concrete floor passes through the connecting piece with the girder steel and connects, the girder steel has the neutralization axle, and the above part of neutralization axle forms the pressurized district, the pressurized district includes the T shape pressurized district and the concrete floor of girder steel, installs the reinforcement angle steel in the girder steel outside, the reinforcement angle steel is located the T shape pressurized district of girder steel, and two limb boards of reinforcement angle steel hug closely web and the top flange of girder steel respectively, and the reinforcement angle steel is at the web both sides symmetrical arrangement of girder steel. This novel reinforcing angle steel is set up at the web pressurized district of steel beam to reduce the ratio of width to thickness of pressurized district web, make the combination beam web satisfy S1 cross-section grade, improved the bending resistance and the shearing bearing capacity of combination beam simultaneously. This novel simple structure is favorable to promoting the use of combination roof beam in steel construction reinforcement project.

Inventors

• ZHANG KEWEI
• LIU ZHIXIN

Assignees

• 安徽省建筑设计研究总院股份有限公司

Dates

Publication Date

20260505

Application Date

20250217

Claims (6)

1. 1. The structure for improving the section grade of the combined beam comprises a steel beam (1), reinforcing angle steel (2) and a concrete floor (5), and is characterized in that the concrete floor (5) is connected with the steel beam (1) through a connecting piece (6), the steel beam (1) is provided with a neutralization shaft (4), a compression area is formed above the neutralization shaft (4), the compression area comprises a T-shaped compression area (3) of the steel beam (1) and the concrete floor (5), the reinforcing angle steel (2) is installed outside the steel beam (1), the reinforcing angle steel (2) is located in the T-shaped compression area (3) of the steel beam (1), two limb plates of the reinforcing angle steel (2) are respectively clung to a web plate and an upper flange of the steel beam (1), and the reinforcing angle steel (2) is symmetrically arranged on two sides of the web plate of the steel beam (1).
2. 2. A structure for increasing the cross-sectional grade of a composite girder according to claim 1, wherein the girder (1) has an upper flange, a lower flange and a web, and wherein a web compression zone (101) is formed between the upper flange and the upper flange above the center shaft (4) of the girder (1).
3. 3. The structure for improving the section grade of the composite beam according to claim 1, wherein the reinforcing angle steel (2) is longitudinally arranged along the steel beam (1), and the reinforcing angle steel (2) is welded with the steel beam (1).
4. 4. A structure for increasing the cross-sectional grade of a composite girder according to claim 1, characterized in that the connecting members (6) are studs welded to the upper flanges of the girder (1).
5. 5. A structure for improving the cross-sectional grade of a composite girder according to claim 1, wherein the connecting member (6) is a channel steel welded to the upper flange of the girder (1).
6. 6. The structure for improving the section grade of the composite beam according to claim 2, wherein the length of the limb plate on the side, which is clung to the web, of the reinforcing angle steel (2) is the same as the height of the web compression area (101), and the length of the limb plate on the side, which is clung to the upper flange, of the reinforcing angle steel (2) is the same as the overhanging length of the upper flange.

Description

Structure for improving section grade of composite beam Technical Field The utility model relates to the technical field of steel structures, in particular to a structure for improving the section grade of a composite beam. Background In recent years, the requirements of the existing building reconstruction projects on the steel structure reinforcement technology are higher and higher, the bending resistance bearing capacity of the original steel girder can not meet the use requirements due to the reasons of the change of the using functions of the building, the newly added partition wall body, the improvement of the load subentry coefficient and the like, and the bending resistance bearing capacity of the steel girder can be improved by considering the combined girder under the action of the concrete floor slab. The existing steel structure design standard (GB 50017 2017) requires that the composite beam needs to meet the S1 section grade of the plastic design requirement, and meanwhile, the arrangement requirement of bolts is provided to restrain the pressed flange, but the arrangement of bolts of the conventional composite beam is difficult to meet the requirement of restraining the pressed flange, and the web plate of the steel beam is thinner, so that the requirement of the S1 section grade is more difficult to meet. Meanwhile, even if the original steel beam is designed according to the combined beam, the requirement of the steel structure design specification (GB 50017 2003) on the width-thickness ratio of the web is lower, which is equivalent to the S2 section grade of the current steel structure design standard (GB 50017 2017), the requirement of S1 cannot be met, and the web is reinforced at the moment. The conventional reinforcement mode comprises the steps of cutting a concrete floor slab, cutting off studs, re-welding the studs, encrypting the stud spacing, pouring concrete, and adhering steel to the whole web of the steel beam for reinforcement, so that the original structure is damaged, steel is wasted, and the construction process is complex. Therefore, the structure for improving the section grade of the combined beam through the angle steel is provided, and the web plate and the upper flange of the pressed area of the steel beam are reinforced, so that the steel beam meets the requirement of the section grade S1. Disclosure of utility model Aiming at the problems in the prior art, the utility model provides a structure for improving the section grade of a composite beam. In order to achieve the above purpose, the present utility model provides the following technical solutions: The structure for improving the section grade of the composite beam comprises a steel beam, reinforcing angle steel and a concrete floor, wherein the concrete floor is connected with the steel beam through a connecting piece, the steel beam is provided with a neutralization shaft, a compression area is formed above the neutralization shaft, the compression area comprises a T-shaped compression area of the steel beam and the concrete floor, the reinforcing angle steel is arranged on the outer side of the steel beam and is positioned in the T-shaped compression area of the steel beam, two limb plates of the reinforcing angle steel are respectively clung to a web plate and an upper flange of the steel beam, and the reinforcing angle steel is symmetrically arranged on two sides of the web plate of the steel beam. As a further improvement of the scheme, the steel beam is provided with an upper flange, a lower flange and a web, and a web compression area is formed between the upper flange and the upper part of the middle shaft of the steel beam. As a further improvement of the scheme, the reinforced angle steel is longitudinally arranged along the steel beam, and the reinforced angle steel and the steel beam are welded. As a further improvement of the solution, the connecting piece is a peg, which is welded with the upper flange of the steel beam. As a further improvement of the scheme, the connecting piece is a channel steel, and the channel steel is welded with the upper flange of the steel beam. As a further improvement of the scheme, the length of the limb plate on one side, close to the web, of the reinforcing angle steel is identical to the height of the web compression area, and the length of the limb plate on one side, close to the upper flange, of the reinforcing angle steel is identical to the overhanging length of the upper flange. Compared with the prior art, the utility model has the beneficial effects that the reinforcing angle steel is arranged in the T-shaped compression zone of the steel beam so as to reduce the width-thickness ratio of the web plate and the upper flange of the compression zone, so that the combined beam meets the S1 section grade, and the bending and shearing bearing capacity of the combined beam is improved. The novel thinking is clear, the structure is simple, and the combined beam is