CN218508786U - Corrugated steel web H-shaped steel - Google Patents
Corrugated steel web H-shaped steel Download PDFInfo
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- CN218508786U CN218508786U CN202221857369.0U CN202221857369U CN218508786U CN 218508786 U CN218508786 U CN 218508786U CN 202221857369 U CN202221857369 U CN 202221857369U CN 218508786 U CN218508786 U CN 218508786U
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Abstract
The application relates to a corrugated steel web H shaped steel includes: the two top flanges are two tooth-shaped steel plates which are mirror images, the shape of each tooth-shaped steel plate corresponds to the waveform of the corrugated web, the bottom flanges are flat steel plates, the corrugated web is perpendicularly welded on the bottom flanges, the two top flanges of the mirror images are parallel to the bottom flanges and are welded on the two sides of the corrugated web, and the corrugated web extends out of the two top flanges. The process of welding the shear connector on the upper flange is eliminated, so that the welding workload can be reduced, and the cost is saved.
Description
Technical Field
The application relates to the technical field of building profiles, in particular to corrugated steel web H-shaped steel.
Background
Corrugated steel web girder steel generally comprises steel roof, bottom plate and corrugated steel web, compares in traditional H shaped steel, can obtain higher plane external rigidity and anti shear capacity with thinner web thickness, possess more superior mechanical properties and economic advantages. In order to obtain higher out-of-plane rigidity and shear-resistant bearing capacity, the traditional H-shaped steel adopts a method of welding vertical stiffening ribs. The added welding stiffening ribs can increase the steel consumption, the quality of welding seams is difficult to guarantee, cracks are easy to generate in the long-term use process, and potential safety hazards are generated.
Corrugated steel web compares in traditional flat steel web, possess higher plane external rigidity and shear stable bearing capacity, need not add and weld stiffening rib, and the structure is simple relatively, and the quality can be better obtains guaranteeing. And because of the advantage of geometric shape, corrugated steel web compares traditional flat steel web, and thickness can suitably reduce, and the structural member dead weight can corresponding reduce, possess better economic benefits.
In the multi-story and high-rise steel structure, if a steel member is combined with a concrete material to form a steel-concrete combined member different from a reinforced concrete member, the advantages of the two materials can be more effectively utilized. Compared with the traditional steel beam scheme, the combined beam scheme has the advantages of lower steel consumption, lower beam height and good integral wall and shear resistance. In recent years, corrugated steel web combined H-shaped steel has been widely applied to multi-story and high-rise steel structures, and related industrial regulations have been published and used. However, for the connection between the corrugated web plate combined H-shaped steel and the concrete floor, the traditional connection method of the H-shaped steel and the concrete floor is still adopted, for example, shear connectors such as studs, channel steel and the like are welded on a steel beam top plate, so that the steel and the concrete can mutually transmit shear force to work together. The method has the disadvantages of large welding workload, need to use special high-power welding equipment, difficult guarantee of welding quality and large steel consumption.
In order to better enable the corrugated steel web H-shaped steel and the concrete floor to work together, a novel corrugated steel web H-shaped steel which is simple in structure and reasonable in stress needs to be developed.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the embodiment of the application provides a corrugated steel web H-shaped steel, which cancels a process of additionally welding a shear connector on an upper flange, thereby reducing the welding workload and saving the cost.
In view of this, according to an embodiment of the present application, there is provided a corrugated steel web H-section steel, including: the two top flanges are two tooth-shaped steel plates which are mirror images, the shapes of the two tooth-shaped steel plates correspond to those of the wave-shaped web, the bottom flange is a flat steel plate, the wave-shaped web is vertically welded on the bottom flange, the two top flanges of the mirror images are parallel to the bottom flange and are welded on two sides of the wave-shaped web, and the wave-shaped web extends out of the two top flanges.
According to the embodiment of the application, the extending sections of the corrugated web extending out of the two upper flanges welded on the corrugated web are used for connecting concrete floors.
According to the embodiment of the application, the wave form of the corrugated web plate comprises one or a combination of a rectangular wave form, a trapezoidal wave form and a rounded trapezoidal wave form.
According to an embodiment of the application, the two top flanges are toothed steel plates formed by cutting through rolled rectangular steel plates.
According to the embodiment of the application, the welding modes of the two upper flanges and the lower flange and the corrugated web plate comprise automatic welding, semi-automatic welding and manual welding.
According to an embodiment of the application, the corrugated web is processed by cold-bending, rolling or stamping.
According to the embodiment of the application, the two upper flanges, the lower flange and the corrugated web are sprayed with fireproof and anticorrosive coatings.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) The procedure of welding the shear connector on the upper flange is cancelled, so that the welding workload is reduced, and the cost is saved;
(2) The two upper flanges are two tooth-shaped steel plates which are mirror images of each other, and the length of the extending section of the corrugated web plate can be adjusted by adjusting the welding positions of the two upper flanges and the corrugated web plate;
(3) Can work with the concrete floor jointly, form the combination beam, compare and have higher bearing capacity and wholeness in pure steel roof beam to can reduce the steel consumption, possess better economic advantages.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description only relate to some embodiments of the present application and are not limiting on the present application.
FIG. 1 is a schematic view of the overall structure of corrugated steel web H-shaped steel;
FIG. 2 is an exploded view of the components of the H-beam with corrugated steel web.
Description of reference numerals:
1, 2-top flange; 3-a corrugated web; 4-lower flange.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without inventive effort, are within the scope of protection of the application.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
FIG. 1 is a schematic view showing the overall structure of a corrugated steel web H-beam, and FIG. 2 is an exploded view showing the constituent parts of the corrugated steel web H-beam.
Referring to fig. 1 and 2 in combination, in the embodiment of the present invention, the corrugated steel web H-section steel may include two upper flanges (1 and 2), a lower flange 4 and a corrugated web 3, the two upper flanges (1 and 2) are two toothed steel plates that are mirror images of each other and have a shape corresponding to the wave shape of the corrugated web 3, the lower flange 4 may be a flat steel plate, the corrugated web 3 is perpendicularly welded to the lower flange 4, the two mirror-imaged upper flanges (1 and 2) are welded to both sides of the corrugated web 3 in parallel to the lower flange 4, and the corrugated web 3 extends out of the two upper flanges by a distance.
Furthermore, the extending section of the corrugated web 3 extending from the two top flanges welded thereon is used for connecting a concrete floor.
Further, the wave shape of the corrugated web 3 may include one or a combination of rectangular wave shape, trapezoidal wave shape and rounded trapezoidal wave shape.
Further, the two upper flanges (1 and 2) are toothed steel plates formed by cutting using a rolled rectangular steel plate.
Further, the welding modes of the two upper flanges (1 and 2) and the lower flange 4 and the corrugated web 3 comprise automatic welding, semi-automatic welding and manual welding.
Furthermore, the processing mode of the corrugated web 3 includes a cold-bending, rolling or stamping mode.
Furthermore, the two upper flanges (1 and 2), the lower flange 4 and the corrugated web 3 can be sprayed with fireproof and anticorrosive coatings.
It can be understood that the protruding section of the corrugated web 3 protruding out of the upper flange can replace the traditional shear connectors such as studs, channel steel and the like.
When the corrugated web 3 is connected with the upper flange and the lower flange, the adopted welding line can be calculated according to the internal force design value of the component and relevant national standards and industrial specifications, and the proper welding line form and the welding leg height are adopted. And a factory equal-strength welding mode can be adopted, so that the field workload is reduced, and the quality of the welding seam is reduced due to high-altitude operation.
When considering concrete floor and corrugated steel web H shaped steel form combined member common work, corrugated steel web H shaped steel is connected with concrete floor's complete shear promptly, is similar with traditional girder steel roof welding stud and channel-section steel. The concrete on the upper surface of the top plate and the root part of the shearing resistant piece is subjected to local pressure bearing, and whether the concrete floor slab and the corrugated steel web H-shaped steel can work together depends on the elastic modulus of the concrete, the strength grade of the concrete and the shape and the extension length of the corrugated web 3. The corrugated web 3 works in concrete like a beam on an elastic foundation, and under the pulling force of bending shears and lifting of a wing plate, the side surface of the corrugated web 3 facing the stress direction can be completely or partially pressed, and simultaneously, reinforcing bars in the concrete wing plate also have influence on the work of the connecting piece. It is difficult to analyze the load bearing capacity of a connector purely using mechanical methods, and it is common to resort to testing.
According to relevant research and current specifications at home and abroad, the expression of the shear resistance bearing capacity of the shear resistant part can be determined as follows:
in the formula (I), the compound is shown in the specification,
alpha is the bearing capacity of the shearing resistant piece, alpha is the bearing capacity coefficient determined by the test, beta is the geometric shape coefficient determined by the shape of the shearing resistant piece, f c Designed value for concrete compressive bearing capacity, E c The modulus of elasticity of concrete. After the bearing capacity coefficient and the shearing resistant piece shape coefficient are determined according to the test, the bearing capacity formula is multiplied by 0.85 to reduce the bearing capacity coefficient and the shearing resistant piece shape coefficient according to the practice in the current specification due to the considerations of insufficient experience, reliability and the like. Because the corrugated web 3 is flexible, the mechanical property should be similar to that of the traditional channel steel shear, and the local bearing resistance of concrete is limited to be near the root of the corrugated web 3. When the design value of the bending moment at the cross section is larger, in order to resist the lifting action, a flat steel plate with structural properties can be additionally welded at the end part of the overhanging web plate so as to enhance the integrity of the composite beam.
According to the research on the fatigue test of the steel member-concrete floor composite beam at home and abroad, the fatigue mainly occurs in a weld zone. Compared with the traditional stud and channel steel connecting piece, the area of the welding seam area of the corrugated steel web H-shaped steel with the web extending outwards is larger, the welding seam is longer, and the fatigue resistance is also better.
The steel plates used by the upper and lower flanges can determine the area of the steel plate with the flange according to the design value of the section bending moment, and then determine the length and the thickness of the steel plate with the flange according to the width-thickness ratio of the plate in the current specification. The wave shape, the thickness and the extending length of the corrugated web 3 can be determined according to a cross section shear design value, a bending moment design value and a connecting piece shear resistance bearing capacity calculation formula determined by tests, so as to have better shear resistance bearing capacity. The web waveform preferably adopts a trapezoidal waveform and a rectangular waveform. For members with special requirements on fire prevention and corrosion prevention, fire prevention and corrosion prevention coatings can be sprayed on the members, and the thickness of each member is properly increased.
The concrete design process of the corrugated steel web H-shaped steel as the main beam of the civil building is illustrated below by taking a floor system in the civil building as an example.
Firstly, determining the load on a floor according to the column network arrangement and the building application, and determining the bending moment and the shear design value of the beam section;
and secondly, calculating the section modulus of the steel part according to the type of the steel. According to a common engineering method, the section modulus of the H-shaped steel is considered to be provided by the upper flange and the lower flange, and when the composite beam is designed, the section modulus of the steel part is half of that of the pure steel part, so that the areas of the upper flange and the lower flange are calculated;
thirdly, determining the proper geometric sizes of the upper flange and the lower flange according to the width-thickness ratio of the plate;
and fourthly, determining the width of the concrete wing plate according to the thickness of the concrete floor and the sizes of the upper flange and the lower flange. Rechecking to determine whether the design value of the bending moment of the section can be met when the composite beam is designed;
fifthly, determining the shape of the corrugated web 3 according to the design value of the cross section shear force;
and sixthly, manufacturing a full-scale or reduced-scale test piece, and determining a shear-resistant bearing capacity calculation formula for the shear-resistant connecting piece by using the corrugated web 3 extending outwards. And determining a shear design value at the junction of the concrete and the steel component according to the bending moment design value and the section height, and calculating whether the outward extension of the corrugated web 3 can meet the shear design value at the junction.
In the implementation process, the waveform and thickness of the corrugated web 3, the thickness and size of the upper and lower flanges, the height of the section, the thickness of the concrete floor and the strength grade are flexibly adjusted according to the actual stress condition of the section.
Compared with the prior art, the method can achieve at least the following beneficial effects:
(1) The procedure of welding the shear connector on the upper flange is cancelled, so that the welding workload is reduced, and the cost is saved;
(2) The two upper flanges are two tooth-shaped steel plates which are mirror images of each other, and the length of the extending section of the corrugated web 3 can be adjusted by adjusting the welding positions of the two upper flanges and the corrugated web 3;
(3) Can work with concrete floor jointly, form the combination beam, have higher bearing capacity and wholeness compared with pure steel roof beam to can reduce the steel volume, possess better economic advantages.
The above description is only exemplary of the present application and is not intended to limit the scope of the present application, which is defined by the appended claims.
Claims (7)
1. A corrugated steel web H-shaped steel is characterized by comprising: the two top flanges are two tooth-shaped steel plates which are mirror images, the shapes of the two tooth-shaped steel plates correspond to those of the wave-shaped web, the bottom flange is a flat steel plate, the wave-shaped web is vertically welded on the bottom flange, the two top flanges of the mirror images are parallel to the bottom flange and are welded on two sides of the wave-shaped web, and the wave-shaped web extends out of the two top flanges.
2. The corrugated steel web H-section steel as claimed in claim 1, wherein the protruding section of the corrugated web, which protrudes from the two upper flanges welded thereto, is used for connecting concrete floor slabs.
3. The corrugated steel web H-shaped steel as claimed in claim 1, wherein the wave shape of the corrugated web comprises one or more of a combination of rectangular wave shape, trapezoidal wave shape and rounded trapezoidal wave shape.
4. The H-section steel for corrugated steel web according to claim 1, wherein the two upper flanges are tooth-shaped steel plates formed by cutting using rolled rectangular steel plates.
5. The corrugated steel web H-section steel as claimed in claim 1, wherein the welding of the two upper and lower flanges to the corrugated web includes automatic welding, semi-automatic welding and manual welding.
6. The corrugated steel web H-section steel of claim 1, wherein the corrugated web is processed by cold bending, rolling or stamping.
7. The corrugated steel web H-section steel of claim 1, wherein the two upper flanges, the lower flange and the corrugated web are coated with a fireproof and anticorrosive paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221857369.0U CN218508786U (en) | 2022-07-19 | 2022-07-19 | Corrugated steel web H-shaped steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221857369.0U CN218508786U (en) | 2022-07-19 | 2022-07-19 | Corrugated steel web H-shaped steel |
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| Publication Number | Publication Date |
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| CN218508786U true CN218508786U (en) | 2023-02-21 |
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| CN202221857369.0U Active CN218508786U (en) | 2022-07-19 | 2022-07-19 | Corrugated steel web H-shaped steel |
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