CN211736050U - Section steel concrete beam - Google Patents
Section steel concrete beam Download PDFInfo
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- CN211736050U CN211736050U CN201922325891.9U CN201922325891U CN211736050U CN 211736050 U CN211736050 U CN 211736050U CN 201922325891 U CN201922325891 U CN 201922325891U CN 211736050 U CN211736050 U CN 211736050U
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Abstract
The utility model discloses a shaped steel concrete roof beam, shaped steel concrete roof beam includes shaped steel roof beam and support frame, the support frame cover is located on the shaped steel roof beam, and with the last pterygoid lamina contact of shaped steel roof beam, the support frame is kept away from one side of the last pterygoid lamina of shaped steel roof beam is stupefied with the steel pipe owner that is located shaped steel roof beam below and is connected to it is stupefied fixedly mainly through the steel pipe. The utility model discloses a support frame is established to the cover on shaped steel roof beam, supports the support frame through shaped steel roof beam, can undertake the construction load through the bearing capacity of shaped steel self like this, need not to set up and support the support body and bear the construction load to avoided taking place workman's accident of falling and harm workman life safety's problem when setting up the support body.
Description
Technical Field
The utility model relates to a building concrete component technical field, in particular to shaped steel concrete beam.
Background
The modern high-rise building completes the conversion of the structure type through a structure conversion layer, and the structure conversion layer has the characteristics of large bearing load, large internal space, large member section and the like. The steel reinforced concrete structure has the advantages of strong bearing capacity, good ductility, strong shock resistance, good fireproof and corrosion resistance and smaller member section size (compared with the traditional reinforced concrete beam), can ensure the use space of a building, and is often applied to a structure conversion layer. However, in the existing steel reinforced concrete structure, a support frame body is generally arranged at the lower part of the steel reinforced concrete beam, and the support frame body is utilized to bear construction load. When the support frame body is erected, falling accidents of workers are easy to happen, and the life safety of the workers is damaged.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's not enough, provide a shaped steel concrete beam.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts as follows:
the utility model provides a shaped steel concrete roof beam, its includes shaped steel roof beam and support frame, the support frame cover is located on the shaped steel roof beam, and with the last pterygoid lamina contact of shaped steel roof beam, the support frame is kept away from one side of the last pterygoid lamina of shaped steel roof beam is connected with the steel pipe owner below the shaped steel roof beam is stupefied to it is fixed mainly to be stupefied through the steel pipe.
The shaped steel concrete roof beam, wherein, the shaped steel roof beam includes pterygoid lamina, lower pterygoid lamina and a supporting beam, a supporting beam's both ends respectively with go up the pterygoid lamina with the lower pterygoid lamina is connected, go up the upper surface of pterygoid lamina and arrange the both sides face that the direction extends along a plurality of supporting beams all with the support frame contacts.
The steel reinforced concrete beam, wherein, the support frame is U type structure support frame, and the opening of U type structure support frame is stupefied direction towards the steel pipe owner.
The profiled bar concrete roof beam, wherein, the support frame includes two vertical support bar and a crossbeam, two vertical support bar are located the both sides of shaped steel roof beam respectively, the crossbeam is located the last pterygoid lamina top of shaped steel roof beam, and two vertical support bar all pass the crossbeam and with the crossbeam is connected.
The profiled bar concrete roof beam, wherein, be provided with first vertical stiffening rib and vertical stiffening rib on the supporting beam, first vertical stiffening rib and vertical stiffening rib are located supporting beam's both sides just all are connected with last pterygoid lamina.
The shaped steel concrete roof beam, wherein, it is provided with a plurality of vertical stiffening ribs to follow vertical direction interval on the supporting beam, all be provided with on every vertical stiffening rib with supporting beam matched with recess, supporting beam pass the recess of each vertical stiffening rib in proper order and with each vertical stiffening rib is connected.
The shaped steel concrete roof beam, wherein, shaped steel concrete roof beam includes interior stirrup and outer stirrup, interior stirrup is located the cover and is located the support frame, outer stirrup is located the interior stirrup outside.
The steel reinforced concrete beam comprises a plurality of tie bar pairs, wherein the tie bars correspond to a plurality of longitudinal stiffening ribs one by one, and two tie bars in each tie bar pair are positioned on two sides of the longitudinal stiffening rib corresponding to each tie bar respectively and are connected with the longitudinal stiffening rib and the outer hoop.
The shaped steel concrete roof beam, wherein, be provided with the steel reinforcement cage pillar on the carriage, steel reinforcement cage pillar one end is connected with the support frame, and the other end extends and is connected with interior stirrup along vertical direction.
Shaped steel concrete roof beam, wherein, the steel pipe is owner stupefied and is equipped with positioning groove, positioning groove keeps away from the main stupefied one side of steel pipe is provided with the steel backing plate, the support frame is kept away from the one end of the last pterygoid lamina of shaped steel roof beam passes in proper order the steel pipe is owner stupefied, positioning groove and the steel backing plate, and quilt the steel backing plate is spacing.
Has the advantages that: compared with the prior art, the utility model provides a shaped steel concrete beam, shaped steel concrete beam includes shaped steel roof beam and support frame, the support frame cover is located on the shaped steel roof beam, and with the last pterygoid lamina contact of shaped steel roof beam, the support frame is kept away from one side of the last pterygoid lamina of shaped steel roof beam is stupefied with the steel pipe owner that is located shaped steel roof beam below and is connected to it is stupefied fixedly mainly through the steel pipe. The utility model discloses a support frame is established to the cover on shaped steel roof beam, supports the support frame through shaped steel roof beam, can undertake the construction load through the bearing capacity of shaped steel self like this, need not to set up and support the support body and bear the construction load to avoided taking place workman's accident of falling and harm workman life safety's problem when setting up the support body.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a steel reinforced concrete beam provided in this embodiment.
Fig. 2 is a schematic view illustrating an assembly of a middle support frame and a section steel beam according to an embodiment of the steel reinforced concrete beam provided by the embodiment.
Fig. 3 is a schematic structural view of another embodiment of the steel reinforced concrete beam provided in this embodiment.
Fig. 4 is a schematic structural view of a vertical stiffener in one embodiment of the steel reinforced concrete beam provided in this embodiment.
Fig. 5 is a schematic structural view of a longitudinal stiffener in one embodiment of the steel reinforced concrete beam provided in this embodiment.
Fig. 6 is a schematic structural view of an inner stirrup of an embodiment of the steel reinforced concrete beam provided by the embodiment.
Fig. 7 is a schematic structural diagram of a middle and outer stirrup of an embodiment of the steel reinforced concrete beam provided in this embodiment.
Fig. 8 is a schematic structural view of another embodiment of the steel reinforced concrete beam provided in this embodiment.
Fig. 9 is a schematic structural view of a positioning groove of an embodiment of the steel reinforced concrete beam provided in this embodiment.
Fig. 10 is a schematic structural view of a steel gasket of an embodiment of the steel reinforced concrete beam provided in this embodiment.
Detailed Description
The utility model provides a shaped steel concrete beam, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the following refers to the attached drawing and the embodiment of lifting the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should be further noted that the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc., indicating directions or positional relationships based on those shown in the drawings, it is only for convenience of description and simplicity of description, but not for indicating or implying that the indicated device or element must have a specific direction, be constructed in a specific direction, and operate, and therefore, the terms describing the positional relationships in the drawings are used only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the above terms according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The following description of the embodiments will further explain the present invention by referring to the figures.
The present embodiment provides a steel reinforced concrete beam, as shown in fig. 1 and 2, the steel beam 10 and the support frame 20, the steel beam 10 includes an upper wing plate 11, a support beam 12 and a lower wing plate 13, one end of the support beam 12 is connected to the upper wing plate 11, and the other end is connected to the lower wing plate 13. An opening 21 is formed at one end of the support frame 20, and the section steel beam 10 passes through the opening 21 to be placed in the support frame 20. The side of the support frame 20 away from the opening 21 is in contact with the upper wing plate 11, so that the support frame 20 is supported by the upper wing plate 11. One end of the support frame provided with the opening 21 is connected with a steel pipe main ridge 50 positioned below the lower wing plate 13, so that the support frame 20 is supported through the steel pipe main ridge 50. Through the cover at shaped steel roof beam 10 is equipped with support frame 20 like this, make shaped steel roof beam 10 becomes the supporting member of shaped steel concrete beam, undertakes the construction load through the bearing capacity of shaped steel self promptly to need not to set up the 20 bodies of support frame and bear the construction load, avoided taking place workman's accident of falling and endangering workman life safety's problem when setting up the 20 bodies of support frame.
Further, the support frame 20 is a U-shaped support frame, the opening 21 of the U-shaped support frame faces the direction of the lower wing plate 13, and the two U-shaped arms of the U-shaped support frame are respectively located at two sides of the section steel beam 10 and are respectively connected with the main edge 50 of the steel pipe located below the lower wing plate 13. It can be understood that the U-shaped support frame and the steel pipe main ridge 50 form a receiving space, the section steel beam 10 is placed in the receiving space, and the top surface of the upper wing plate 11 of the section steel beam 10 contacts the inner surface of the support frame 20 on the side away from the opening 21, so as to support the support frame 20 through the section steel beam 10. In addition, in practical application, the two U-shaped arms of the U-shaped support frame are both in contact with the upper wing plate 11, so that the part of the support frame 20 located between the two U-shaped arms is completely attached to the upper wing plate 11, the supporting force applied to all parts of the part of the support frame 20 located between the two U-shaped arms is uniform, and the part of the support frame 20 located between the two U-shaped arms is prevented from being locally damaged.
Further, as shown in fig. 1 and 2, the supporting frame 20 includes a first supporting rod 22, a second supporting rod 23, and a first cross rod 24; the first support bar 22 and the second support bar 23 are parallel to the support beam 12, the first support bar 22 and the second support bar 23 are respectively located at two sides of the support beam 12, and the first cross bar 24 is located above the upper wing plate 11 and parallel to the upper wing plate 11. One end of the first crossbar 24 is connected to the first support bar 22, and the other end of the first crossbar 24 is connected to the second support bar 23 to form a U-shaped structure. In one implementation manner of this embodiment, as shown in fig. 3, two ends of the first cross bar 24 respectively extend out of the upper wing plate 11, the first support bar 22 and the second support bar 23 respectively pass through the first cross bar 24, a limiting member 25 is disposed at one end of the first cross bar 24 where the first support bar 22 passes through and one end of the second support bar 23 passes through the first cross bar 24, and the limiting member 25 is in contact with the first cross bar 24 to fix the limiting member 25 and the upper wing plate 11 to the first cross bar 24. The limiting member 25 may be a first double-layer nut, and correspondingly, first threads are disposed at one end of the first support rod 22 penetrating through the first cross rod 24 and one end of the second support rod penetrating through the first cross rod 24, and the first double-layer nut is matched with the first threads to be connected to the first support rod 22/the second support rod 23.
Further, as shown in fig. 1, the steel reinforced concrete beam further includes a first vertical stiffener 31 and a second vertical stiffener 32, one end of the first vertical stiffener 31 is connected to one end of the upper wing plate 11 near the first support rod 22, and the other end is connected to the support beam 12 such that the first vertical stiffener 31 is inclined with respect to the upper wing plate 11. The second vertical stiffener 32 has one end connected to the upper wing plate 11 near the second support bar 23 and the other end connected to the support beam 12 so that the second vertical stiffener 32 is inclined with respect to the upper wing plate 11. It can be understood that the first vertical stiffener 31 and the second vertical stiffener 32 are both disposed obliquely, and the first vertical stiffener 31 and the second vertical stiffener 32 are respectively located at two sides of the supporting beam 12, so that the upper wing plate 11 can be supported by the first vertical stiffener 31 and the second vertical stiffener 32, and the supporting effect of the section steel beam 10 is further improved. In one possible implementation manner of this embodiment, the first vertical stiffener 31 and the second vertical stiffener 32 are of the same structure and are symmetrically arranged on both sides of the scout supporting beam 12. For example, as shown in fig. 4, the first vertical stiffener 31 and the second vertical stiffener 32 are each a trapezoidal structure, and the bottom of the trapezoidal structure is inclined in the direction from the upper wing plate 11 to the support beam 12.
Further, in one implementation manner of the present embodiment, as shown in fig. 1 and 2, a plurality of longitudinal stiffeners 40 are disposed on the support beam 12, the longitudinal stiffeners 40 are sequentially arranged at intervals along the extending direction of the support beam 12, and the distance between any two adjacent longitudinal stiffeners 40 in the longitudinal stiffeners 40 is equal. Each of the plurality of longitudinal stiffeners 40 has the same structure, and one longitudinal stiffener 40 is illustrated here as an example. As shown in fig. 5, the longitudinal stiffener 40 includes a longitudinal stiffener body 41, and the longitudinal stiffener body 41 is provided with a groove 42, and the groove 42 is matched with the support beam 12, so that the longitudinal stiffener body 41 is sleeved on the support beam 12 through the groove 42. Therefore, when the tie bars are assembled on the supporting beam 12, the tie bars can be connected to the longitudinal stiffening ribs 40, so that the hole opening amount of the supporting beam 12 is reduced, the safety of the supporting beam 12 is improved, the construction difficulty is reduced, and the construction speed is accelerated.
Further, as shown in fig. 1, the steel reinforced concrete beam is wrapped by a plurality of side formworks 100 and a bottom formwork 130, the side formworks 100 enclose along the bottom formwork 130 is circumferentially arranged and is connected with the bottom formwork 130 to form an accommodating cavity. The support frame 20 is arranged in the accommodating cavity, and one end of the support frame 20 far away from the upper wing plate 11 penetrates through the bottom formwork 130 to be connected with the steel pipe main ridge 50 below the bottom formwork 130. Wherein, be provided with a plurality of to drawing the screw rod between two side formworks 100 that arrange along upper limb board 11 extending direction in a plurality of side formworks 100 to connect two side formworks 100 through a plurality of to drawing the screw rod.
Further, as shown in fig. 1, a plurality of waist ribs, an inner stirrup 110, an outer stirrup 120 and a pair of soft tie bars are bound outside the support plate, and the waist ribs extend along the beam span direction and are arranged in the circumferential direction around the inner wall of the accommodating cavity. The outer stirrups 120 are located outside each waist reinforcement, the inner stirrups 110 are located between the waist reinforcement and the support frame 20, and the inner stirrups 110 are attached to the outer side surfaces of the support frame 20. The tie bars correspond to the longitudinal stiffening ribs 40 one to one, and two tie bars in each tie bar pair are located on both sides of the longitudinal stiffening rib 40 corresponding to each tie bar and are connected with the longitudinal stiffening rib 40. One tie bar of each tie bar pair is connected with the longitudinal stiffening rib 40, and the other end of the tie bar pair is connected with the waist bar positioned at the inner side of the outer stirrup 120 to form a reinforcement cage.
As shown in fig. 6, the inner stirrup 110 includes a first inner stirrup portion and a second inner stirrup portion, both of which are U-shaped, and when the first inner stirrup portion and the second inner stirrup portion are bound, the two U-shaped arms of the first inner stirrup portion and the two U-shaped arms of the second inner stirrup portion are overlapped and connected together by spot welding. In one possible implementation manner of this embodiment, when the first inner bead portion and the second inner bead portion are bound, one U-shaped arm of the first inner bead portion is located above one U-shaped arm of the second inner bead portion, and the other U-shaped arm of the first inner bead portion is located between the two U-shaped arms of the second inner bead portion. Of course, in practical applications, both U-shaped arms of the first inner bead portion may be located between both U-shaped arms of the second inner bead portion.
As shown in fig. 7, the outer stirrup 120 includes a first outer stirrup portion and a second outer stirrup portion, the first outer stirrup portion may include a first transverse bar, one end of the first transverse bar is provided with a first bending portion, and the first bending portion is inclined relative to the first transverse bar. The outer stirrup portion of second includes that the horizontal muscle of second, first perpendicular muscle and second erect the muscle, and first perpendicular muscle and second erect muscle parallel arrangement and all be connected in order to form U type structure with the horizontal muscle of second, be provided with the second kink on the first perpendicular muscle, be provided with the third kink on the second perpendicular muscle, the third kink extends and is on a parallel with the horizontal muscle of second to being close to the second perpendicular muscle direction, the second kink is to being close to the second erects the muscle to extend to for first perpendicular muscle to being close to the slope of second horizontal pole direction. When the first outer stirrup part of ligature and the outer stirrup part of second, the third kink is located first horizontal muscle below and is connected with first horizontal muscle, the second kink is located first kink below and is connected with first kink to make the connection of the outer stirrup part of first outer stirrup part and second. In addition, the length of the first bent portion, the length of the second bent portion, and the length of the third bent portion are equal, and the lengths may be determined according to a welding method, for example, when the welding method is double-sided welding, the length is 5 times the diameter of the stirrup, and when the welding method is single-sided welding, the length is 10 times the diameter of the stirrup.
Referring to fig. 8, a reinforcement cage support 140 is disposed on the support frame 20, and one end of the reinforcement cage support 140 is connected to the support frame, and the other end of the reinforcement cage support 140 extends in a vertical direction and is connected to the inner stirrup 110. The support frame 20 is symmetrically provided with two reinforcement cage struts 140 at a certain distance along the beam span direction, the lower end of each reinforcement cage strut 140 is welded with the upper flange of the section steel, and the upper end of each reinforcement cage strut is welded with the waist rib to support the reinforcement cage. In addition, as shown in fig. 1, the main stupefied 50 of steel pipe is equipped with positioning groove 60 in the cover, positioning groove 60 is kept away from the main stupefied 50 of steel pipe one side is provided with steel backing plate 70, support frame 20 is kept away from the one end of the last pterygoid lamina 11 of shaped steel beam 10 passes in proper order the main stupefied 50 of steel pipe, positioning groove 60 and steel backing plate 70, and by steel backing plate 70 is spacing. As shown in fig. 9, a first through hole 61 is photographed on the positioning groove 60, as shown in fig. 10, a second through hole 71 is provided on the steel shim plate 70, the first through hole 61 and the second through hole 71 have the same aperture, and are both matched with one end of the support frame 20 penetrating through the main ridge 50 of the steel pipe, so that one end of the support frame 20 penetrating through the main ridge can penetrate through the first through hole 61 and the second through hole 71. In addition, one end of the support frame 20 penetrating through the steel backing plate 70 is connected with a second double-layer nut through a second thread arranged on the support frame so as to fix the support frame 20 and the steel pipe main edge 50 through the second double-layer nut.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a shaped steel concrete roof beam, its includes shaped steel roof beam, its characterized in that, it still includes the support frame, the support frame cover is located on the shaped steel roof beam, and with the last pterygoid lamina contact of shaped steel roof beam, the support frame is kept away from one side of the last pterygoid lamina of shaped steel roof beam is stupefied with the steel pipe owner that is located shaped steel roof beam below and is connected to it is stupefied fixedly mainly through the steel pipe.
2. The steel reinforced concrete beam according to claim 1, wherein the section steel beam includes an upper wing plate, a lower wing plate and a support beam, both ends of the support beam are connected to the upper wing plate and the lower wing plate, respectively, and both the upper surface of the upper wing plate and both side surfaces extending in the arrangement direction of the plurality of support beams are in contact with the support frame.
3. The steel reinforced concrete beam as claimed in claim 1 or 2, wherein the support frame is a U-shaped structural support frame, and an opening of the U-shaped structural support frame faces a direction of the steel pipe main ridge.
4. A steel reinforced concrete beam as claimed in claim 1 or 2, wherein the support frame comprises two vertical support bars and a cross beam, the two vertical support bars are respectively located at both sides of the section steel beam, the cross beam is located above the upper wing plate of the section steel beam, and the two vertical support bars pass through the cross beam and are connected with the cross beam.
5. The steel reinforced concrete beam as claimed in claim 2, wherein the support beam is provided with first vertical stiffeners and vertical stiffeners, and the first vertical stiffeners and the vertical stiffeners are located on two sides of the support beam and are connected with the upper wing plate.
6. The steel reinforced concrete beam as claimed in claim 2, wherein the support beam is provided with a plurality of longitudinal stiffening ribs at intervals in the vertical direction, each longitudinal stiffening rib is provided with a groove matched with the support beam, and the support beam sequentially passes through the grooves of the longitudinal stiffening ribs and is connected with the longitudinal stiffening ribs.
7. A profiled concrete beam as claimed in claim 6, wherein the profiled concrete beam includes an inner stirrup and an outer stirrup, the inner stirrup being located around the support frame and the outer stirrup being located outside the inner stirrup.
8. A steel reinforced concrete beam according to claim 7, including a plurality of pairs of tie bars, the tie bars corresponding one to the longitudinal stiffeners, and two tie bars in each pair of tie bars being located on either side of the longitudinal stiffener to which each tie bar corresponds and being connected to the longitudinal stiffener and the outer hoop.
9. A steel reinforced concrete beam as claimed in claim 6, wherein the support frame is provided with a reinforcement cage post, one end of which is connected to the support frame and the other end of which extends in a vertical direction and is connected to the inner stirrup.
10. The steel reinforced concrete beam as recited in claim 1, wherein a positioning groove is sleeved on the steel pipe main ridge, a steel backing plate is arranged on one side, away from the steel pipe main ridge, of the positioning groove, and one end, away from the upper wing plate of the section steel beam, of the support frame sequentially penetrates through the steel pipe main ridge, the positioning groove and the steel backing plate and is limited by the steel backing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922325891.9U CN211736050U (en) | 2019-12-19 | 2019-12-19 | Section steel concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922325891.9U CN211736050U (en) | 2019-12-19 | 2019-12-19 | Section steel concrete beam |
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| CN211736050U true CN211736050U (en) | 2020-10-23 |
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| CN201922325891.9U Active CN211736050U (en) | 2019-12-19 | 2019-12-19 | Section steel concrete beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952719A (en) * | 2019-12-19 | 2020-04-03 | 中建四局土木工程有限公司 | Section steel concrete beam and construction method thereof |
| CN113338440A (en) * | 2021-06-29 | 2021-09-03 | 福建宏之升钢结构工程有限公司 | Steel beam supporting structure with multi-layer steel structure |
-
2019
- 2019-12-19 CN CN201922325891.9U patent/CN211736050U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952719A (en) * | 2019-12-19 | 2020-04-03 | 中建四局土木工程有限公司 | Section steel concrete beam and construction method thereof |
| CN113338440A (en) * | 2021-06-29 | 2021-09-03 | 福建宏之升钢结构工程有限公司 | Steel beam supporting structure with multi-layer steel structure |
| CN113338440B (en) * | 2021-06-29 | 2022-06-21 | 福建宏之升钢结构工程有限公司 | Steel beam supporting structure with multi-layer steel structure |
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