CN111980157A - Open steel pipe concrete structure with cold-bending turned edge and batten plate - Google Patents
Open steel pipe concrete structure with cold-bending turned edge and batten plate Download PDFInfo
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- CN111980157A CN111980157A CN202010872811.6A CN202010872811A CN111980157A CN 111980157 A CN111980157 A CN 111980157A CN 202010872811 A CN202010872811 A CN 202010872811A CN 111980157 A CN111980157 A CN 111980157A
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- steel pipe
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
Abstract
An open steel pipe concrete structure with cold-bending turned edges and batten plates comprises an open outer steel pipe, a plurality of batten plates arranged on an opening of the open outer steel pipe, a plurality of PBL stiffening ribs arranged on the inner wall of the open outer steel pipe, and concrete filled in the open outer steel pipe; the open outer steel pipe is manufactured by adopting a steel plate cold-bending and edge-curling technology. The invention has simple structure, reasonable design, convenient construction, lower construction cost, excellent mechanical property and good use effect, and can effectively solve the problems of more welding seams of the assembled outer steel pipe, obvious stress concentration phenomenon, inconvenient manufacturing process, inconvenient filling of concrete filled in the steel pipe, difficult guarantee of concrete compactness and the like in the existing polygonal steel pipe concrete structure.
Description
Technical Field
The invention relates to a steel pipe concrete structure, in particular to an open steel pipe concrete structure with cold-bending turned edges and batten plates.
Background
The steel pipe concrete structure is a composite structure formed by filling concrete in steel pipes. The steel has better tension-compression performance, the concrete compression performance is better than the tension performance, the steel pipe concrete structure fully exerts the advantages of the two materials, and the steel pipe concrete has excellent mechanical performance and higher bearing capacity by utilizing the hoop effect of the steel pipe on the filled concrete. At present, the steel pipe concrete structure is widely applied to structures such as bridges, ocean platforms, industrial plants and the like. In addition, the arrangement of the perforated stiffening ribs (PBL stiffening ribs) in the steel pipe can improve the combination effect of steel and concrete, thereby enhancing the compressive strength of the steel pipe concrete structure and improving the pipe wall stability of the thin-wall steel pipe. However, the steel pipe concrete structure or the PBL steel pipe concrete structure used at present generally has the problems of complicated steel pipe assembling and manufacturing, inconvenient construction for filling concrete in a steel pipe, difficult guarantee of concrete filling quality and the like, and the defects limit the development and application of the steel pipe concrete structure to a certain extent.
In addition, the steel pipes manufactured by welding and assembling the plates have different welding quality in a construction site, more welding defects exist, the stress and fatigue performance of a steel pipe concrete structure are reduced, and for a bridge structure adopting the steel pipe concrete structure as a bearing structure, the durability and the service life of the structure are influenced by the quality of the fatigue performance due to large live load change. For multi-side steel pipes (rectangular steel pipes, hexagonal steel pipes, etc.) assembled by scattered steel plates, arcs or haunch chamfers are not often arranged at corners, so that a stress concentration phenomenon exists at the corners, and the rigidity of the structure is adversely affected.
In summary, the existing steel pipe concrete structure generally has several problems: firstly, except for circular steel pipes, if polygonal steel pipes are manufactured in a scattered plate welding and assembling mode, the manufacturing process is complicated and the welding quality cannot be guaranteed; secondly, the welding seam existing in the steel pipe is the weak part of the whole structure and is the starting point of fatigue failure, and the fatigue performance of the structure is influenced by more welding seams; thirdly, the rigidity of the structure is influenced by the stress concentration phenomenon at the corners of the steel pipe manufactured by adopting the method of welding and assembling scattered plates; and fourthly, the construction site for filling the concrete into the steel pipe is inconvenient to pour, and the quality of the formed concrete is difficult to guarantee.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cold-bending open steel pipe concrete structure with curled edges and batten plates, which is simple and reasonable in structure, convenient to construct, low in construction cost and excellent in mechanical property. The problems of inconvenient construction, difficult guarantee of the quality of filled concrete, inconvenient manufacture of assembled steel pipes, more assembled welding seams of the steel pipes, difficult control of welding quality, stress concentration at corners of polygonal steel pipes and the like of the existing steel pipe concrete structure can be effectively solved.
In order to solve the technical problems, the invention adopts the technical scheme that:
an open steel pipe concrete structure with cold-bending turned edges and batten plates comprises an open outer steel pipe, a plurality of batten plates arranged on an opening of the open outer steel pipe, a plurality of PBL stiffening ribs arranged on the inner wall of the open outer steel pipe, and concrete filled in the open outer steel pipe; the open outer steel pipe is manufactured by adopting a steel plate cold-bending and edge-curling technology.
The invention is further improved in that the PBL stiffening ribs are arranged in the middle of the inner wall of the open outer steel pipe and are arranged along the length direction of the open outer steel pipe.
The invention is further improved in that concrete is bonded with the opening outer steel pipe, the batten plate and the PBL stiffening rib into a whole.
The invention has the further improvement that the outer steel pipe with the opening is of a seamless one-way opening structure.
The invention is further improved in that the batten plate is welded with the opening outer steel pipe into a whole in a lap joint mode.
The invention is further improved in that the PBL stiffening ribs are welded on the opening outer steel pipe.
The invention is further improved in that concrete is poured in a mode of pouring gaps between openings at two ends of the opening outer steel pipe and the batten plate.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the opening outer steel pipes are all formed by cold-bending and rolling the steel plates, the PBL stiffening ribs required by design are welded at the appointed positions before the steel plates are rolled, compared with the traditional steel plate welding and assembling mode, the manufacturing steps of the outer steel pipes are simplified, the number of welding seams is reduced, different welding modes adopted during steel plate welding and assembling are avoided, the cold-bending rolled outer steel pipes containing the PBL stiffening ribs only contain connecting welding seams between the stiffening ribs and the outer steel pipes, the welding construction is convenient, the quality is easy to guarantee, the internal defects of the structure are reduced, and the mechanical property and the service performance can be improved. The open outer steel pipe is manufactured in a cold bending and rolling mode, the arc-shaped chamfer angle generated in the rolling process exists at the corner of the steel pipe, compared with the steel pipe formed by welding and assembling steel plates, the stress concentration phenomenon is relieved, fewer fatigue sensitive parts of the structure are arranged, and the fatigue performance and the structural rigidity are effectively improved. Compared with a steel pipe formed by hot rolling, the steel pipe manufactured by cold bending has plastic deformation at corners, the cold hardening effect of materials can be fully utilized, the strength is improved, but the rigidity and the torsional resistance are reduced, so that the concrete filled in and the steel pipe outside the opening of the cold bending are fully bonded into a whole by filling the concrete and arranging the PBL stiffening ribs, and the purposes of improving the strength and not reducing the rigidity and the torsional resistance are achieved. Compared with the traditional steel pipe concrete pouring mode, the concrete in the invention can adopt a mode that the two ends of the opening outer steel pipe and the gaps of the batten plates distributed in the opening direction of the outer steel pipe are poured simultaneously, so that the pouring speed of the inner filling concrete can be accelerated, the settling time of concrete aggregate in the construction process is shortened, the inner filling concrete can be poured more smoothly due to the arc-shaped chamfers at the corners of the cold-bending rolled steel pipes, and the aggregate and cement paste in the inner filling concrete are distributed more uniformly. The batten plate gaps distributed in the opening direction of the outer steel pipe can be used for pouring concrete, so that the pouring process of the inner filling concrete is directly visible, the pouring construction process is easier to control, the batten plate gaps can also be used as spaces for vibrating the inner filling concrete after the inner filling concrete is poured, and the quality of the subsequent pouring formed concrete is improved. Meanwhile, in the use process of the structure, the bonding condition of the outer steel pipe and the concrete can be checked at any time through the gap between the outer steel pipe batten plates, and the concrete cracking and debonding positions can be reinforced conveniently. The open steel pipe concrete structure with cold-bending turned edges and batten plates has the advantages of the original steel pipe concrete structure, is convenient to construct, the arrangement distance of the batten plates can be flexibly changed, and the steel consumption is saved.
The invention has simple structure, reasonable design, convenient construction, lower construction cost, excellent mechanical property and good use effect, and can effectively solve the problems of more welding seams of the assembled outer steel pipe, obvious stress concentration phenomenon, inconvenient manufacturing process, inconvenient filling of concrete filled in the steel pipe, difficult guarantee of concrete compactness and the like in the existing polygonal steel pipe concrete structure.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
FIG. 2 is a schematic view of PBL stiffener layout according to example 1 of the present invention.
FIG. 3 is a schematic view of the lay-up of a steel sheet coil in the production of example 1 of the present invention.
FIG. 4 is a schematic view showing the rolling up of a coil of steel plate in example 1 of the present invention.
FIG. 5 is a schematic view of a rolled open rectangular steel pipe with PBL stiffeners in example 1 of the present invention.
FIG. 6 is a schematic view of a steel structural body composed of an open rectangular steel pipe, a gusset plate and PBL stiffeners in example 1 of the present invention.
Fig. 7 is a schematic structural diagram of embodiment 2 of the present invention.
FIG. 8 is a schematic view of PBL stiffener layout according to example 2 of the present invention.
Fig. 9 is a schematic view of the lay-up of a steel sheet coil in the production of example 2 of the present invention.
FIG. 10 is a schematic view showing the rolling up of a coil of steel plate in example 2 of the present invention.
FIG. 11 is a schematic view of a rolled open rectangular steel pipe with PBL stiffeners in example 2 of the present invention.
FIG. 12 is a schematic view of a steel structural body composed of an open rectangular steel pipe, a gusset plate and PBL stiffeners in example 2 of the present invention.
Description of reference numerals:
1-opening rectangular steel pipe; 2-batten plate; 3, concrete;
4-PBL stiffeners; 5-open hexagonal steel pipe.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the open steel pipe concrete structure with cold-bending turned edges and batten plates comprises an open outer steel pipe, a plurality of batten plates 2 uniformly distributed in the opening direction of the open outer steel pipe according to design requirements, a plurality of PBL stiffening ribs 4 distributed on the inner wall of the open outer steel pipe according to actual requirements, and concrete 3 filled in the open outer steel pipe. The open outer steel pipe is manufactured by adopting a steel plate cold-bending and edge-curling technology; the distance between the batten plates 2 distributed in the opening direction of the steel pipe outside the opening is determined by considering the concrete pouring requirement; the PBL stiffening ribs 4 are arranged in the middle of each inner wall of the opening outer steel pipe and are arranged along the length direction of the opening outer steel pipe; the concrete 3 filled in the steel pipe outside the opening can be poured in various ways according to the field construction conditions, and is tightly bonded with the steel pipe outside the opening, the batten plate 2 and the PBL stiffening rib 4 into a whole.
The outer steel pipe of opening is for adopting the mill to cut the seamless one-way open structure that the steel sheet back clod wash system formed, and the cross-sectional form is various, can roll system rectangle or hexagon cross-section at the mill.
The batten plates 2 arranged in the opening direction of the steel pipe outside the opening are welded into a whole with the top plate in the opening direction of the steel pipe in a lap joint mode, and the distance between the batten plates is determined according to the requirement of concrete pouring during construction.
The PBL stiffening ribs 4 are welded at the appointed positions of the steel plates before the steel plates of the outer steel pipes are subjected to cold bending rolling, namely are arranged in the middle of each inner wall of the outer steel pipe with the opening.
The concrete 3 filled in the steel pipe outside the opening can be poured and formed and manually leveled in a way that gaps between the two ends of the steel pipe and the batten plate are simultaneously poured according to site construction conditions, so that the goal that the filled concrete, the steel pipe outside the opening, the batten plate 2 and the PBL stiffening ribs 4 are tightly bonded into a whole is achieved.
The open steel pipe concrete structures with the cold-bending side batten plates all have an opening direction, and the structures can be used as upper and lower chords of medium and small-span truss bridges and chords of other structures which are horizontally arranged in consideration of the construction process of filling concrete.
The following are specific examples.
Example 1
As shown in fig. 1, an embodiment 1 of the present invention includes an open-sided rectangular steel pipe 1, gusset plates 2 uniformly arranged in the opening direction of the open-sided rectangular steel pipe 1, filled concrete 3 filled inside the open-sided rectangular steel pipe 1, and PBL stiffening ribs 4 arranged on the inner wall of the open-sided rectangular steel pipe 1 according to design requirements.
In the actual manufacturing of the open rectangular steel pipe 1, a steel plate cold-bending rolling reference line is drawn on a steel plate with a designed thickness according to the size of the designed rectangular steel pipe, and then the PBL stiffening ribs 4 are welded on the steel plate as required, as shown in FIG. 2. And then rolling the steel plate containing the PBL stiffening ribs 4 into a seamless open rectangular steel pipe 1 in a factory according to a cold bending rolling sequence, wherein the cold bending rolling sequence is shown in figures 3, 4 and 5, and figure 5 is the rolled seamless open rectangular steel pipe 1 containing the PBL stiffening ribs 4. The batten plate 2 which is designed according to stress analysis and construction conditions and matched with the size of the rectangular steel pipe is also manufactured by steel plate cutting, and the manufacturing of the batten plate 2 and the manufacturing of the open rectangular steel pipe 1 are carried out synchronously. After the opening rectangular steel pipe 1 and the batten plate 2 are manufactured, according to the design of the batten plate gap, the batten plate 2 is uniformly distributed in the opening direction of the opening rectangular steel pipe 1, and the batten plate 2 and the opening rectangular steel pipe 1 are welded into a whole in a lap joint mode.
As shown in fig. 6, after the fabrication and installation of the steel structural body composed of the open rectangular steel pipe 1, the gusset plate 2 and the PBL reinforcing ribs 4 are completed, the in-situ concrete 3 may be poured. When the construction conditions are allowed, the pouring can be simultaneously performed through the gaps between the two ends of the open rectangular steel pipe 1 and the gusset plates 2 in the opening direction of the open rectangular steel pipe 1. The pouring condition of the filled concrete 3 can be observed through the gaps of the batten plates 2 at any time in the pouring process of the filled concrete 3, the concrete overflow is controlled, and the pouring quality of the filled concrete 3 is ensured. After the pouring of the filling concrete 3 is completed, the example 1 shown in fig. 1 is obtained by manual leveling.
Example 2
As shown in fig. 7, the embodiment 2 of the present invention includes an open hexagonal steel pipe 5, gusset plates 2 uniformly arranged in the opening direction of the open hexagonal steel pipe 5, filled concrete 3 filled inside the open hexagonal steel pipe 5, and PBL stiffeners 4 arranged on the inner wall of the open hexagonal steel pipe 5 according to design requirements.
In the actual manufacturing of the open hexagonal steel pipe 5, a steel plate cold-bending rolling reference line is drawn on a steel plate with a designed thickness according to the size of the designed hexagonal steel pipe, and then the PBL stiffening ribs 4 are welded on the steel plate as required, as shown in FIG. 8. And then rolling the steel plate containing the PBL stiffening ribs 4 into a seamless open hexagonal steel tube 5 in a factory according to a cold bending rolling sequence, wherein the cold bending rolling sequence is shown in figures 9, 10 and 11, and figure 11 is the rolled seamless open hexagonal steel tube 5 containing the PBL stiffening ribs 4. The batten plate 2 which is designed according to stress analysis and construction conditions and matched with the size of the hexagonal steel pipe is also manufactured by steel plate cutting, and the manufacturing of the batten plate 2 and the manufacturing of the open hexagonal steel pipe 5 are carried out synchronously. After opening hexagon steel pipe 5 and batten plate 2 all made, according to design batten plate clearance, evenly lay batten plate 2 and adopt the lapped mode to weld batten plate 2 and opening hexagon steel pipe 5 into whole in the opening direction of opening hexagon steel pipe 5.
As shown in fig. 12, after the fabrication and installation of the steel structural body composed of the open hexagonal steel pipes 5, the gusset plates 2, and the PBL stiffeners 4 are completed, the in-fill concrete 3 may be poured on site. When the construction conditions allow, pouring can be simultaneously performed through the gaps between the two ends of the open hexagonal steel pipe 5 and the gusset plates 2 in the opening direction of the open hexagonal steel pipe 5. The pouring condition of the filled concrete 3 can be observed through the gaps of the batten plates 2 at any time in the pouring process of the filled concrete 3, the concrete overflow is controlled, and the pouring quality of the filled concrete 3 is ensured. After the pouring of the filling concrete 3 is completed, the example 2 shown in fig. 7 is obtained by manual leveling.
Claims (7)
1. The open steel pipe concrete structure with cold-bending turned edges and batten plates is characterized by comprising an open outer steel pipe, a plurality of batten plates (2) arranged on an opening of the open outer steel pipe, a plurality of PBL stiffening ribs (4) arranged on the inner wall of the open outer steel pipe and concrete (3) filled in the open outer steel pipe; the open outer steel pipe is manufactured by adopting a steel plate cold-bending and edge-curling technology.
2. A cold-formed open-ended steel tubular concrete structure with gusset plate according to claim 1, wherein the PBL stiffening rib (4) is disposed in the middle of the inner wall of the open-ended steel tubular and along the length of the open-ended steel tubular.
3. A cold-bent open-ended steel pipe concrete structure with gusset plate according to claim 1, wherein concrete (3) is bonded integrally with the open-ended outer steel pipe, the gusset plate (2), and the PBL stiffening ribs (4).
4. The open steel tube concrete structure with the cold-bending turned edge with the batten plate according to claim 1, wherein the open outer steel tube is of a seamless one-way open structure.
5. The open steel pipe concrete structure with cold-bending turned edge with gusset plate according to claim 1, wherein the gusset plate (2) is welded integrally with the open outer steel pipe in an overlapping manner.
6. A cold-formed open-ended steel tubular concrete structure with hemming plate according to claim 1 wherein PBL stiffening ribs (4) are welded to the open-ended steel tube.
7. The open steel tube concrete structure with the cold-bending turned edge with the batten plate according to claim 1, wherein concrete (3) is poured in a manner that openings at two ends of the open outer steel tube (1) are in clearance pouring with the batten plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010872811.6A CN111980157A (en) | 2020-08-26 | 2020-08-26 | Open steel pipe concrete structure with cold-bending turned edge and batten plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010872811.6A CN111980157A (en) | 2020-08-26 | 2020-08-26 | Open steel pipe concrete structure with cold-bending turned edge and batten plate |
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| CN111980157A true CN111980157A (en) | 2020-11-24 |
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| CN202010872811.6A Pending CN111980157A (en) | 2020-08-26 | 2020-08-26 | Open steel pipe concrete structure with cold-bending turned edge and batten plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012140824A (en) * | 2011-01-05 | 2012-07-26 | Takenaka Komuten Co Ltd | Concrete filled steel pipe column |
| CN202969251U (en) * | 2012-11-17 | 2013-06-05 | 长安大学 | Carbon cloth-opened stiffening rib dual-stiffened concrete-filled square steel tubular column |
| CN103615072A (en) * | 2013-11-25 | 2014-03-05 | 广西大学 | Steel-encased concrete steel column with built-in spiral stirrup |
| CN104060761A (en) * | 2014-05-23 | 2014-09-24 | 浙江东南网架股份有限公司 | U-shaped steel-concrete composite section beam and construction method of section beam |
| CN105089204A (en) * | 2015-05-12 | 2015-11-25 | 重庆大学 | Cold-formed thin-walled ribbed U-shaped steel-encased concrete laminated slab composite beam |
| CN207499244U (en) * | 2017-09-29 | 2018-06-15 | 浙江省建工集团有限责任公司 | A kind of teeprofile concrete combination column |
-
2020
- 2020-08-26 CN CN202010872811.6A patent/CN111980157A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012140824A (en) * | 2011-01-05 | 2012-07-26 | Takenaka Komuten Co Ltd | Concrete filled steel pipe column |
| CN202969251U (en) * | 2012-11-17 | 2013-06-05 | 长安大学 | Carbon cloth-opened stiffening rib dual-stiffened concrete-filled square steel tubular column |
| CN103615072A (en) * | 2013-11-25 | 2014-03-05 | 广西大学 | Steel-encased concrete steel column with built-in spiral stirrup |
| CN104060761A (en) * | 2014-05-23 | 2014-09-24 | 浙江东南网架股份有限公司 | U-shaped steel-concrete composite section beam and construction method of section beam |
| CN105089204A (en) * | 2015-05-12 | 2015-11-25 | 重庆大学 | Cold-formed thin-walled ribbed U-shaped steel-encased concrete laminated slab composite beam |
| CN207499244U (en) * | 2017-09-29 | 2018-06-15 | 浙江省建工集团有限责任公司 | A kind of teeprofile concrete combination column |
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