CN216688987U - Parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connection system applied to assembled steel-perforated precast concrete slab composite beam - Google Patents
Parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connection system applied to assembled steel-perforated precast concrete slab composite beam Download PDFInfo
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Abstract
本实用新型公开了一种应用于装配式钢‑开孔预制混凝土板组合梁中的并列异形PBL剪力连接系统，包括钢梁、开孔预制混凝土板、并列异形PBL剪力连接件和灌孔料。并列异形PBL剪力连接件由N个异形钢板和3根贯穿钢筋组成，N个异形钢板焊接在钢梁上翼缘上。异形钢板开设有圆孔和三个缺口。一个贯穿钢筋依次穿过N个圆孔，另外两个贯穿钢筋分别搁置在异形钢板两侧边缘的缺口上。开孔预制混凝土板预留孔内在安装定位好钢梁和预制混凝土板后现场浇筑有混凝土，混凝土包裹在异形钢板和贯穿钢筋的外围并填充到圆孔和缺口的缝隙中。本实用新型的并列异形PBL剪力连接件与混凝土的接触面积大，改善了其受力性能，避免了传统PBL剪力连接件焊缝过长的缺点。
The utility model discloses a parallel special-shaped PBL shear connection system applied to an assembled steel-perforated precast concrete slab composite beam, comprising a steel beam, a perforated prefabricated concrete slab, a parallel special-shaped PBL shear connection and a filling hole material. The parallel special-shaped PBL shear connector is composed of N special-shaped steel plates and 3 through steel bars, and the N special-shaped steel plates are welded on the upper flange of the steel beam. The special-shaped steel plate is provided with round holes and three notches. One through-bar passes through the N round holes in turn, and the other two through-bars rest on the gaps on both sides of the special-shaped steel plate respectively. After the steel beams and precast concrete slabs are installed and positioned in the reserved holes of the open-hole precast concrete slab, concrete is poured on site. The concrete is wrapped around the periphery of the special-shaped steel plate and the penetrating steel bar and filled into the gaps of the round holes and the gaps. The parallel special-shaped PBL shear connection piece of the utility model has a large contact area with the concrete, which improves its stress performance and avoids the disadvantage that the welding seam of the traditional PBL shear force connection piece is too long.
Description
Technical Field
The utility model relates to the field of bridge engineering, in particular to a parallel special-shaped PBL shear connection system applied to an assembly type steel-perforated precast concrete slab combination beam.
Background
The steel-concrete composite beam can combine the advantages of two materials, and has the advantages of small dead weight, high strength, strong earthquake resistance, high durability and the like, and is widely applied to the fields of bridges, high-rise buildings and the like. In recent years, with the release of a series of national policy requirements for building industrialization, fabricated steel-concrete composite structures stand out in the composite structures with the advantages of high quality, high-efficiency production, convenient transportation, rapid installation and the like. As a representative of the assembly type steel-open-cell precast slab composite beam, it is composed of steel beams, connecting members, open-cell precast concrete slabs, and hole-filling materials, and thus has been increasingly used because it has advantages of both a composite structure and an assembly type structure.
The shear connector is a key part for ensuring the cooperative work of steel and concrete, has the function of preventing overlarge slippage and separation of an interface, and enables steel materials with different elastic moduli and concrete to be connected into a whole. The group nail connecting piece is widely applied to the assembled steel-concrete combined structure due to the advantages of simple stress mechanism, good ductility, mature process and the like. But because of the low bearing capacity of the single cylindrical head welding nail, more cylindrical head welding nails are needed by the single group of group nail connecting pieces, and because of the existence of the group nail effect, the size of the preformed hole in the precast concrete plate is further enlarged, and the workload of on-site wet operation is increased. Meanwhile, the oversized prepared holes also cause certain difficulties in the arrangement of the steel bars in the precast concrete slab.
In recent years, the perforated steel plate shear connector (PBL) has the advantages of high bearing capacity, good fatigue resistance and the like as a rigid connector, is popularized and applied to high-rise buildings and bridge construction, and is particularly widely applied to large-scale bridge engineering. However, most of the PBL shear connectors need to be arranged in the full length of the beam length range, have large welding deformation, are difficult to place through reinforcing steel bars, and are not suitable for assembled steel-concrete composite beams except for a post-cast strip with reserved through length.
Disclosure of Invention
The utility model aims to provide a parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connection system applied to an assembled steel-perforated precast concrete slab composite beam so as to overcome the defects of a group nail shear connection piece and a perforated steel plate shear connection piece.
The technical scheme adopted for achieving the aim of the utility model is that the parallel special-shaped PBL shear connection system applied to the fabricated steel-perforated precast concrete slab combination beam comprises a steel beam, a perforated precast concrete slab, parallel special-shaped PBL shear connectors and hole filling materials.
The steel beam is welded with the parallel special-shaped PBL shear connectors, and the perforated precast concrete plate located above the steel beam is provided with a preformed hole at the position corresponding to the parallel special-shaped PBL shear connectors.
The parallel special-shaped PBL shear connector is arranged in the reserved hole and comprises a plurality of special-shaped steel plates and three penetrating steel bars.
The N shaped steel plates which are parallel to each other are welded to the upper flange of the steel beam, the N shaped steel plates are arranged at equal intervals along the width direction of the upper flange of the steel beam, the plane normal of each shaped steel plate is perpendicular to the length direction of the steel beam, and N is a natural number which is more than or equal to 2.
The special-shaped steel plate is provided with a round hole and three gaps, one gap is positioned at the upper edge of the special-shaped steel plate, and the other two gaps are respectively positioned at the two side edges of the special-shaped steel plate.
One penetrating steel bar sequentially penetrates through the round holes in the N special-shaped steel plates, and the other two penetrating steel bars are respectively placed on the notches at the two side edges of the special-shaped steel plates.
And a hole filling material is cast in the reserved hole, the deformed steel plate and the through steel bar are coated in the hole filling material, and the hole filling material is filled into the gaps of the round hole and the notch to form the concrete tenon.
Further, the edge of the special-shaped steel plate comprises a straight line segment a, a straight line segment b, a circular arc segment c, a circular arc segment d, a straight line segment e, a circular arc segment f, a straight line segment g, a circular arc segment h, a straight line segment i, a circular arc segment j, a straight line segment k, a circular arc segment m, a circular arc segment n and a straight line segment p.
The straight line section a is the lower edge of the special-shaped steel plate and is horizontal, two ends of the straight line section a are connected with the lower end of the straight line section b and the lower end of the straight line section p respectively, and the straight line section b and the straight line section p are vertical.
The upper end of the straight line section b is connected with the upper end of the arc section c, the lower end of the arc section c is connected with the lower end of the arc section d, the upper end of the arc section d is connected with the lower end of the straight line section e, the upper end of the straight line section e is connected with the lower end of the arc section f, the upper end of the arc section f is connected with the horizontal straight line section g, the straight line section g is connected with the arc section h, the arc section h is connected with the horizontal straight line section i, the straight line section i is connected with the upper end of the arc section j, the lower end of the arc section j is connected with the upper end of the straight line section k, the lower end of the arc section k is connected with the upper end of the arc section m, the lower end of the arc section m is connected with the upper end of the arc section n, and the lower end of the arc section n is connected with the upper end of the straight line section p.
The vertical bisection plane of the special-shaped steel plate is marked as a plane S, the notch on the upper edge of the special-shaped steel plate is marked as a notch I, and the notches on the two side edges of the special-shaped steel plate are respectively marked as a notch II and a notch III.
The circle center of the circular hole is located on a plane S, the arc section h which is a semicircular arc is a notch I, and the plane S penetrates through the circle center of the arc section h. The arc section c, the arc section d and the straight line section e are connected to form a notch II, the straight line section k, the arc section m and the arc section n are connected to form a notch III, and the notch II and the notch III are symmetrical relative to the plane S.
The straight line section b and the straight line section p are symmetrical about the plane S, the circular arc section f and the circular arc section j are symmetrical about the plane S, and the straight line section g and the straight line section i are symmetrical about the plane S.
Furthermore, the thickness of the special-shaped steel plate is t, t is more than or equal to 6mm and less than or equal to 16mm, the distance between adjacent special-shaped steel plates is recorded as x, the distance between the special-shaped steel plate on the outermost side and the edge of the upper flange of the steel beam is recorded as y, x is more than or equal to 3t, and y is more than or equal to 3 t.
Furthermore, the diameter of the through reinforcing steel bar is recorded as q, q is larger than or equal to 8mm and smaller than or equal to 20mm, the length of the end part of the through reinforcing steel bar extending out of the outermost profiled steel plate is u, u is larger than or equal to 0.5x, and the length u meets the requirement of the thickness of the concrete protective layer.
Further, the profiled steel sheet is cut and blanked by laser or plasma.
Furthermore, the preformed hole is wedge-shaped or bowl-shaped, and the minimum distance from the hole wall of the preformed hole to the parallel special-shaped PBL shear connectors meets the requirement of the minimum protective layer thickness.
Further, the pore filling material is common concrete, high-strength mortar or ultra-high performance concrete.
The utility model has the beneficial effects that:
1. the parallel special-shaped PBL shear connection system applied to the assembled steel-perforated precast concrete slab composite beam can apply the PBL type shear connector to an assembled combined structure, and can avoid a series of problems caused by long welding seams of connectors in the traditional PBL shear;
2. the parallel special-shaped PBL shear connection system applied to the assembled steel-open precast concrete slab combination beam can additionally consider the side bearing force of the special-shaped steel plate and the contribution of a plurality of grooves to the shearing bearing force, increase the contact area of the connecting piece and the concrete, reduce the stress concentration and improve the working performance;
3. the parallel special-shaped PBL shear connection system applied to the assembled steel-open precast concrete slab combination beam can greatly improve the problems of large reserved holes, difficult rib arrangement and the like caused by the application of the traditional group nail connecting piece;
4. when the special-shaped steel plate is processed, the raw materials can be fully utilized for cutting and blanking, and the materials are saved to the maximum extent.
Drawings
FIG. 1 is a cut-away three-dimensional view of the system of the present invention;
FIG. 2 is a perspective view of an open-pore precast concrete panel;
FIG. 3 is a three-dimensional view of a side-by-side profiled PBL shear connector;
FIG. 4 is a three-dimensional view of a deformed steel plate;
FIG. 5 is a plan view of a deformed steel plate;
FIG. 6 is a dimension diagram of a deformed steel plate;
FIG. 7 is a schematic diagram of blanking of the deformed steel plate.
In the figure: the steel beam comprises a steel beam 1, a perforated precast concrete plate 2, a preformed hole 201, a parallel special-shaped PBL shear connector 3, a special-shaped steel plate 301, a penetrating steel bar 302, a hole filling material 4, a round hole 401 and a notch 402.
Detailed Description
The present invention will be further described with reference to the following examples, but it should be understood that the scope of the subject matter described above is not limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the utility model and the scope of the utility model is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses a parallel special-shaped PBL shear connection system applied to an assembly type steel-perforated precast concrete slab composite beam, which comprises a steel beam 1, a perforated precast concrete slab 2, a parallel special-shaped PBL shear connection piece 3 and a hole filling material 4. The steel beam 1 is made of Q460 grade steel, and the perforated precast concrete plate 2 is made of C40 commercial concrete.
Referring to fig. 1, a parallel special-shaped PBL shear connector 3 is welded on the steel beam 1, and referring to fig. 2, a preformed hole 201 is formed in the perforated precast concrete plate 2 above the steel beam 1 at a position corresponding to the parallel special-shaped PBL shear connector 3.
The parallel special-shaped PBL shear connector 3 is arranged in the preformed hole 201, and the parallel special-shaped PBL shear connector 3 comprises a plurality of special-shaped steel plates 301 and three penetrating steel bars 302. The deformed steel plate 301 is made of Q235-grade steel, and the penetrating steel bar 302 is made of HRB400 ribbed steel bar.
Referring to fig. 3, N parallel deformed steel plates 301 are welded to the upper flange of the steel beam 1, the N deformed steel plates 301 are arranged at equal intervals along the width direction of the upper flange of the steel beam 1, the normal of the deformed steel plates 301 is perpendicular to the length direction of the steel beam 1, N is a natural number greater than or equal to 2, and in this embodiment, N is 3.
Referring to fig. 4, the deformed steel plate 301 is provided with a circular hole 401 and three notches 402, one notch 402 is located at the upper edge of the deformed steel plate 301, and the other two notches 402 are respectively located at the two side edges of the deformed steel plate 301. The round holes 401 and the notches 402 of the N profiled steel sheets 301 are aligned with each other.
Referring to fig. 5, the edge of the deformed steel plate 301 includes a straight line segment a, a straight line segment b, a circular arc segment c, a circular arc segment d, a straight line segment e, a circular arc segment f, a straight line segment g, a circular arc segment h, a straight line segment i, a circular arc segment j, a straight line segment k, a circular arc segment m, a circular arc segment n, and a straight line segment p.
The straight line segment a is the lower edge of the special-shaped steel plate 301 and is horizontal, two ends of the straight line segment a are connected with the lower end of the straight line segment b and the lower end of the straight line segment p respectively, and the straight line segment b and the straight line segment p are vertical.
The upper end of the straight line section b is connected with the upper end of the arc section c, the lower end of the arc section c is connected with the lower end of the arc section d, the upper end of the arc section d is connected with the lower end of the straight line section e, the upper end of the straight line section e is connected with the lower end of the arc section f, the upper end of the arc section f is connected with the horizontal straight line section g, the straight line section g is connected with the arc section h, the arc section h is connected with the horizontal straight line section i, the straight line section i is connected with the upper end of the arc section j, the lower end of the arc section j is connected with the upper end of the straight line section k, the lower end of the arc section k is connected with the upper end of the arc section m, the lower end of the arc section m is connected with the upper end of the arc section n, and the lower end of the arc section n is connected with the upper end of the straight line section p.
The vertical bisection plane of the special-shaped steel plate 301 is marked as a plane S, the notch 402 at the upper edge of the special-shaped steel plate 301 is marked as a notch I, and the notches 402 at the two side edges of the special-shaped steel plate 301 are respectively marked as a notch II and a notch III.
The circle center of the circular hole 401 is located on a plane S, a semicircular arc section h is a notch I, and the plane S penetrates through the circle center of the arc section h. The arc section c, the arc section d and the straight line section e are connected to form a notch II, the straight line section k, the arc section m and the arc section n are connected to form a notch III, and the notch II and the notch III are symmetrical relative to the plane S.
The straight line section b and the straight line section p are symmetrical about the plane S, the circular arc section f and the circular arc section j are symmetrical about the plane S, and the straight line section g and the straight line section i are symmetrical about the plane S.
One penetrating steel bar 302 sequentially penetrates through the round holes 401 on the N profiled steel plates 301, and the other two penetrating steel bars 302 are respectively placed on the notches 402 at the two side edges of the profiled steel plates 301.
The thickness of the special-shaped steel plates 301 is t, t is more than or equal to 6mm and less than or equal to 16mm, the distance between the adjacent special-shaped steel plates 301 is recorded as x, the distance between the special-shaped steel plate 301 on the outermost side and the edge of the upper flange of the steel beam 1 is recorded as y, x is more than or equal to 3t, and y is more than or equal to 3 t. The plate width of the deformed steel plate 301 is not less than 100mm and not more than 150mm, and the deformed steel plate can meet the thickness requirement of a concrete protective layer when the plate height is applied. The aperture of the round hole 401 is not less than 2 times of the diameter of the through reinforcing steel bar 302 and is not more than 60mm, the distance from the center of the round hole 401 to the upper surface of the upper flange of the steel beam 1 is D, and in the embodiment, D is 25 mm.
The diameter of the through reinforcing steel bar 302 is recorded as q, q is larger than or equal to 8mm and smaller than or equal to 20mm, the length of the end part of the through reinforcing steel bar 302 extending out of the outermost profiled steel plate 301 is u, u is larger than or equal to 0.5x, and the length u meets the requirement of the thickness of the concrete protective layer.
Referring to fig. 1, a hole filling material 4 is cast in the reserved hole 201, the deformed steel plate 301 and the through reinforcement 302 are coated in the hole filling material 4, the hole filling material 4 is filled in a gap between the circular hole 401 and the notch 402 to form a concrete tenon, and the concrete tenon and the through reinforcement 302 resist shearing force and drawing force together. The material adopted by the hole filling material 4 is ordinary concrete, high-strength mortar or ultra-high performance concrete, the ultra-high performance concrete is selected in the embodiment, and the compressive strength of the standard cubic test block is measured to be 120 MPa. The preformed hole 201 is wedge-shaped or bowl-shaped, and the minimum distance from the hole wall of the preformed hole 201 to the parallel special-shaped PBL shear connector 3 meets the requirement of the minimum protective layer thickness.
Referring to fig. 6, which is a schematic size diagram of the deformed steel plate 301 according to the embodiment, a length unit in the diagram is mm, the deformed steel plate 301 is blanked by laser or plasma cutting, the blanking schematic diagram is shown in fig. 7, and a length unit in the diagram is mm, as can be seen from fig. 7, when a rectangular raw material is cut into a plurality of deformed steel plates 301, the raw material can be used completely, zero waste is achieved, and the manufacturing cost is saved.
The assembly sequence of the parallel special-shaped PBL shear connection system applied to the fabricated steel-open pore precast concrete slab combination beam in the embodiment is as follows: welding the special-shaped steel plate 301 and the steel beam 1, placing the penetrating steel 302 on the notch II, the notch III and the round hole 401 of the special-shaped steel plate 301, and positioning and installing the perforated precast concrete slab 2 according to the preformed hole 201 on the perforated precast concrete 2 and the installed parallel special-shaped shear connector 3; and (3) pouring hole filling materials 4 in situ in the preformed holes 201 in the perforated precast concrete plates 2 to finish the assembly of the parallel special-shaped PBL shear connection system applied to the assembled steel-perforated precast concrete plate composite beam.
Example 2:
the embodiment discloses a parallel special-shaped PBL shear connection system applied to an assembly type steel-perforated precast concrete slab composite beam, which comprises a steel beam 1, a perforated precast concrete slab 2, a parallel special-shaped PBL shear connection piece 3 and a hole filling material 4.
Referring to fig. 1, a parallel special-shaped PBL shear connector 3 is welded on the steel beam 1, and referring to fig. 2, a preformed hole 201 is formed in the perforated precast concrete plate 2 above the steel beam 1 at a position corresponding to the parallel special-shaped PBL shear connector 3.
The parallel special-shaped PBL shear connector 3 is arranged in the preformed hole 201, and the parallel special-shaped PBL shear connector 3 comprises a plurality of special-shaped steel plates 301 and three penetrating steel bars 302.
Referring to fig. 3, N parallel deformed steel plates 301 are welded to the upper flange of the steel beam 1, the N deformed steel plates 301 are arranged at equal intervals along the width direction of the upper flange of the steel beam 1, the normal of the deformed steel plates 301 is perpendicular to the length direction of the steel beam 1, and N is a natural number greater than or equal to 2.
Referring to fig. 4, the deformed steel plate 301 is provided with a circular hole 401 and three notches 402, one notch 402 is located at the upper edge of the deformed steel plate 301, and the other two notches 402 are respectively located at the two side edges of the deformed steel plate 301.
One penetrating steel bar 302 sequentially penetrates through the round holes 401 on the N profiled steel plates 301, and the other two penetrating steel bars 302 are respectively placed on the notches 402 at the two side edges of the profiled steel plates 301.
Referring to fig. 1, a hole filling material 4 is cast in the reserved hole 201, the deformed steel plate 301 and the through steel bar 302 are coated in the hole filling material 4, and the hole filling material 4 is filled in a gap between a circular hole 401 and a notch 402 to form a concrete tenon.
Example 3:
the main structure of this embodiment is the same as that of embodiment 2, and further, referring to fig. 5, the edge of the special-shaped steel plate 301 includes a straight line segment a, a straight line segment b, a circular arc segment c, a circular arc segment d, a straight line segment e, a circular arc segment f, a straight line segment g, a circular arc segment h, a straight line segment i, a circular arc segment j, a straight line segment k, a circular arc segment m, a circular arc segment n, and a straight line segment p.
The straight line segment a is the lower edge of the special-shaped steel plate 301 and is horizontal, two ends of the straight line segment a are connected with the lower end of the straight line segment b and the lower end of the straight line segment p respectively, and the straight line segment b and the straight line segment p are vertical.
The upper end of the straight line section b is connected with the upper end of the arc section c, the lower end of the arc section c is connected with the lower end of the arc section d, the upper end of the arc section d is connected with the lower end of the straight line section e, the upper end of the straight line section e is connected with the lower end of the arc section f, the upper end of the arc section f is connected with the horizontal straight line section g, the straight line section g is connected with the arc section h, the arc section h is connected with the horizontal straight line section i, the straight line section i is connected with the upper end of the arc section j, the lower end of the arc section j is connected with the upper end of the straight line section k, the lower end of the arc section k is connected with the upper end of the arc section m, the lower end of the arc section m is connected with the upper end of the arc section n, and the lower end of the arc section n is connected with the upper end of the straight line section p.
The vertical bisection plane of the special-shaped steel plate 301 is marked as a plane S, the notch 402 at the upper edge of the special-shaped steel plate 301 is marked as a notch I, and the notches 402 at the two side edges of the special-shaped steel plate 301 are respectively marked as a notch II and a notch III.
The circle center of the circular hole 401 is located on a plane S, a semicircular arc section h is a notch I, and the plane S penetrates through the circle center of the arc section h. The arc section c, the arc section d and the straight line section e are connected to form a notch II, the straight line section k, the arc section m and the arc section n are connected to form a notch III, and the notch II and the notch III are symmetrical relative to the plane S.
The straight line section b and the straight line section p are symmetrical about the plane S, the circular arc section f and the circular arc section j are symmetrical about the plane S, and the straight line section g and the straight line section i are symmetrical about the plane S.
Example 4:
the main structure of this embodiment is the same as that of embodiment 2, further, the thickness of the deformed steel plates 301 is t, t is greater than or equal to 6mm and less than or equal to 16mm, the distance between adjacent deformed steel plates 301 is x, the distance between the outermost deformed steel plate 301 and the edge of the steel beam upper flange 1 is y, x is greater than or equal to 3t, and y is greater than or equal to 3 t.
Example 5:
the main structure of the embodiment is the same as that of embodiment 2, further, the diameter of the through steel bar 302 is recorded as q, q is larger than or equal to 8mm and smaller than or equal to 20mm, the length of the end portion of the through steel bar 302 extending out of the outermost profiled steel plate 301 is u, u is larger than or equal to 0.5x, and the length u meets the requirement of the thickness of the concrete protective layer.
Example 6:
the main structure of this embodiment is the same as that of embodiment 2, and further, the profiled steel sheet 301 is cut and blanked by laser or plasma.
Example 7:
the main structure of the present embodiment is the same as that of embodiment 2, further, the preformed hole 201 is wedge-shaped or bowl-shaped, and the minimum distance from the hole wall of the preformed hole 201 to the parallel special-shaped PBL shear connector 3 meets the requirement of the minimum protective layer thickness.
Example 8:
the main structure of this embodiment is the same as that of embodiment 2, and further, the pore-filling material 4 is ordinary concrete, high-strength mortar or ultra-high performance concrete. The assembling sequence of the parallel special-shaped PBL shear connection system applied to the assembled steel-perforated precast concrete slab composite beam is as follows: welding the deformed steel plate 301 with the steel beam 1; laying through steel bars 302 on the notches II and III and in the round holes 401 of the special-shaped steel plate 301; positioning and mounting the perforated precast concrete plate 2 according to the preformed hole 201 on the perforated precast concrete plate 2 and the mounted parallel special-shaped PBL shear connector 3; and (3) pouring hole filling materials 4 in situ in the preformed holes 201 in the perforated precast concrete plates 2 to finish the assembly of the parallel special-shaped PBL shear connection system applied to the assembled steel-perforated precast concrete plate composite beam.
Claims (7)
1. A parallel special-shaped PBL shear connection system applied to a fabricated steel-open precast concrete slab composite beam is characterized in that: the steel beam-concrete precast slab comprises a steel beam (1), a perforated precast concrete slab (2), parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connectors (3) and a hole filling material (4);
the steel beam (1) is welded with a parallel special-shaped PBL shear connector (3), and a preformed hole (201) is formed in the perforated precast concrete plate (2) above the steel beam (1) at a position corresponding to the parallel special-shaped PBL shear connector (3);
the parallel special-shaped PBL shear connector (3) is arranged in the preformed hole (201), and the parallel special-shaped PBL shear connector (3) comprises a plurality of special-shaped steel plates (301) and three penetrating steel bars (302);
the N profiled steel plates (301) which are parallel to each other are welded to the upper flange of the steel beam (1), the N profiled steel plates (301) are arranged at equal intervals along the width direction of the upper flange of the steel beam (1), the plane normal of the profiled steel plates (301) is vertical to the length direction of the steel beam (1), and N is a natural number which is more than or equal to 2;
the special-shaped steel plate (301) is provided with a round hole (401) and three notches (402), one notch (402) is positioned at the upper edge of the special-shaped steel plate (301), and the other two notches (402) are respectively positioned at the two side edges of the special-shaped steel plate (301);
one penetrating steel bar (302) sequentially penetrates through round holes (401) in the N special-shaped steel plates (301), and the other two penetrating steel bars (302) are respectively placed on gaps (402) in the edges of the two sides of each special-shaped steel plate (301);
the hole filling material (4) is cast in the preformed hole (201) in a cast-in-place mode, the special-shaped steel plate (301) and the penetrating steel bar (302) are coated in the hole filling material (4), and the hole filling material (4) is filled into gaps of the round hole (401) and the notch (402) to form a concrete tenon.
2. The system of claim 1 wherein the PBL shear connection is a profiled PBL shear connection system in a fabricated steel-open precast concrete slab composite beam, wherein the profiled PBL shear connection system comprises: the edge of the special-shaped steel plate (301) comprises a straight line section a, a straight line section b, an arc section c, an arc section d, a straight line section e, an arc section f, a straight line section g, an arc section h, a straight line section i, an arc section j, a straight line section k, an arc section m, an arc section n and a straight line section p;
the straight line section a is the lower edge of the special-shaped steel plate (301) and is horizontal, two ends of the straight line section a are respectively connected with the lower end of the straight line section b and the lower end of the straight line section p, and the straight line section b and the straight line section p are vertical;
the upper end of the straight line section b is connected with the upper end of the arc section c, the lower end of the arc section c is connected with the lower end of the arc section d, the upper end of the arc section d is connected with the lower end of the straight line section e, the upper end of the straight line section e is connected with the lower end of the arc section f, the upper end of the arc section f is connected with the horizontal straight line section g, the straight line section g is connected with the arc section h, the arc section h is connected with the horizontal straight line section i, the straight line section i is connected with the upper end of the arc section j, the lower end of the arc section j is connected with the upper end of the straight line section k, the lower end of the straight line section k is connected with the upper end of the arc section m, the lower end of the arc section m is connected with the upper end of the arc section n, and the lower end of the arc section n is connected with the upper end of the straight line section p;
the vertical bisection plane of the special-shaped steel plate (301) is marked as a plane S, the notch (402) in the upper edge of the special-shaped steel plate (301) is marked as a notch I, and the notches (402) in the two side edges of the special-shaped steel plate (301) are respectively marked as a notch II and a notch III;
the circle center of the circular hole (401) is located on a plane S, a semicircular arc section h is a notch I, and the plane S penetrates through the circle center of the arc section h; the arc section c, the arc section d and the straight line section e are connected to form a notch II, the straight line section k, the arc section m and the arc section n are connected to form a notch III, and the notch II and the notch III are symmetrical about the plane S;
the straight line section b and the straight line section p are symmetrical about the plane S, the circular arc section f and the circular arc section j are symmetrical about the plane S, and the straight line section g and the straight line section i are symmetrical about the plane S.
3. The system of claim 1, wherein the PBL shear connection system comprises a PBL shear connection system formed by connecting a PBL shear connection system and a PBL shear connection system, wherein the PBL shear connection system comprises: the thickness of the special-shaped steel plates (301) is t, t is more than or equal to 6mm and less than or equal to 16mm, the distance between every two adjacent special-shaped steel plates (301) is recorded as x, the distance between the special-shaped steel plate (301) on the outermost side and the edge of the upper flange of the steel beam is recorded as y, x is more than or equal to 3t, and y is more than or equal to 3 t.
4. The parallel profiled PBL shear connection system applied to an assembled steel-open precast concrete slab composite beam as claimed in claim 3, wherein: the diameter of the through reinforcing steel bar (302) is recorded as q, q is more than or equal to 8mm and less than or equal to 20mm, the length of the end part of the through reinforcing steel bar (302) extending out of the outermost special-shaped steel plate (301) is u, u is more than or equal to 0.5x, and the length u meets the requirement of the thickness of the concrete protective layer.
5. The system of claim 1, wherein the PBL shear connection system comprises a PBL shear connection system formed by connecting a PBL shear connection system and a PBL shear connection system, wherein the PBL shear connection system comprises: the profiled steel sheet (301) is cut and blanked by laser or plasma.
6. The system of claim 1, wherein the PBL shear connection system comprises a PBL shear connection system formed by connecting a PBL shear connection system and a PBL shear connection system, wherein the PBL shear connection system comprises: the preformed hole (201) is wedge-shaped or bowl-shaped, and the minimum distance from the hole wall of the preformed hole (201) to the parallel special-shaped PBL shear connector (3) meets the requirement of the minimum protective layer thickness.
7. The system of claim 1, wherein the PBL shear connection system comprises a PBL shear connection system formed by connecting a PBL shear connection system and a PBL shear connection system, wherein the PBL shear connection system comprises: the pore-filling material (4) is common concrete, high-strength mortar or ultrahigh-performance concrete.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122851216.7U CN216688987U (en) | 2021-11-20 | 2021-11-20 | Parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connection system applied to assembled steel-perforated precast concrete slab composite beam |
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|---|---|---|---|
| CN202122851216.7U CN216688987U (en) | 2021-11-20 | 2021-11-20 | Parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connection system applied to assembled steel-perforated precast concrete slab composite beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808661A (en) * | 2021-11-20 | 2022-07-29 | 重庆大学 | Parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connection system applied to assembled steel-perforated precast concrete slab composite beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808661A (en) * | 2021-11-20 | 2022-07-29 | 重庆大学 | Parallel special-shaped PBL (Poly-p-phenylene benzobisoxazole) shear connection system applied to assembled steel-perforated precast concrete slab composite beam |
| CN114808661B (en) * | 2021-11-20 | 2024-09-24 | 重庆大学 | A parallel special-shaped PBL shear connection system used in assembled steel-opening precast concrete slab composite beams |
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