Inverted T-shaped steel-UHPC (Ultra High Performance Concrete) composite board for bridge

Abstract

The utility model relates to the technical field of bridge components, and provides an inverted T-shaped steel-UHPC (Ultra High Performance Concrete) composite board for a bridge. Comprising UHPC boards and a plurality of pieces of inverted T-shaped steel arranged at intervals in the longitudinal bridge direction, and the UHPC boards are arranged on the inverted T-shaped steel arranged at intervals in the longitudinal bridge direction; a steel plate piece is arranged between the bottom of the UHPC plate and the upper portion of a web of the inverted-T-shaped steel. The upper surface of the steel plate piece is fixedly connected with the UHPC plate, and the lower surface of the steel plate piece is connected with the web plate. The inverted-T-shaped steel-UHPC composite board for the bridge has the advantages that an upper flange plate of H-shaped steel is omitted, the weight of longitudinal ribs of the UHPC composite board can be reduced by more than 1 / 3 through the inverted-T-shaped steel, and therefore the dead weight of an inverted-T-shaped steel-UHPC composite bridge deck system is lighter, and the inverted-T-shaped steel-UHPC composite board can be suitable for large-span bridges such as suspension bridges sensitive to the dead weight height.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge member technical field, concretely relates to a bridge is with inverted T type steel - UHPC combination board. BACKGROUND

[0002] Large span bridge is the symbol reflecting national science and technology level. Steel structure bridge has the advantages such as light weight, large span capacity, good seismic performance, is the first choice of large span bridge. The deck structure of steel bridge usually adopts orthotropic steel deck system, but because steel deck is all-welded structure, not only cost is high, under the action of heavy load vehicle, steel deck system is plagued by two diseases: (1) steel deck slab fatigue cracking and local buckling, endangering bridge safety;(2) frequent damage of asphalt pavement, the cost of repair is huge. The above diseases reduce the bridge operation efficiency, and it is the world problem recognized in steel bridge field, and the above diseases are particularly serious in our country with large heavy load traffic.

[0003] In view of the above problems, the emergence of orthotropic steel plate-UHPC (Ultra-High Performance Concrete, UHPC, hereinafter referred to as UHPC) light composite bridge deck slab greatly improves the stiffness of the deck, reduces the risk of fatigue cracking and pavement damage, and the achievement has been applied to more than 100 real bridges in China, and so far no disease has occurred, and the response is good. But because the UHPC light composite bridge deck slab does not cancel the orthotropic steel deck slab, the cost of the deck structure is still high, and the stress reduction of UHPC layer to the U rib connecting detail is very obvious, but for other details, the reduction degree is not large enough, so theoretically it cannot completely eliminate the risk of fatigue cracking of steel deck. In patents CN109338866A and CN109610310A, a new type of steel-UHPC composite board is proposed, but the structure of the steel-UHPC composite board still has many spaces that can be optimized, such as in the steel-UHPC composite bridge deck, the upper flange plate of the steel plays a role in transmitting the horizontal shear force between the UHPC plate and the steel, and at the same time supports the bottom surface of the UHPC plate. But because the upper flange plate is close to the neutral axis, the contribution of the upper flange plate to the bending inertia moment is small.

[0004] In view of this, the utility model is proposed. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a bridge inverted T type steel-UHPC composite board to solve the technical problems existing in the prior art.

[0006] To achieve the above object, the utility model adopts the technical scheme of: a bridge inverted T type steel-UHPC composite board, comprising: UHPC plate and a plurality of inverted T type steels arranged along the longitudinal bridge direction, the UHPC plate is arranged on the plurality of inverted T type steels arranged along the longitudinal bridge direction;

[0007] A steel plate piece is arranged between the bottom of the UHPC plate and the upper part of the web of the inverted T-shaped steel; the upper surface of the steel plate piece is fixedly connected with the UHPC plate, and the lower surface of the steel plate piece is connected with the web;

[0008] The top of the web is formed with a special-shaped cutout; the UHPC plate is connected with the web at a thickened part formed by thickening treatment.

[0009] In an optional embodiment, the steel plate piece is a steel plate strip, and a plurality of the steel plate strips are arranged along the transverse bridge direction.

[0010] In an optional embodiment, the steel plate piece is an integral steel plate, and a plurality of groups of through holes are arranged on the steel plate, and each group of the through holes is arranged along the transverse bridge direction.

[0011] In an optional embodiment, the top of the web of the inverted T-shaped steel is formed with a first special-shaped cutout, adjacent first special-shaped cutouts are mirror images of each other,

[0012] two sides of each first special-shaped cutout are respectively formed with a first protrusion and a second protrusion, the first protrusion, the first special-shaped cutout and the upper surface of the steel plate strip are connected with the UHPC plate, the upper surface of the second protrusion is connected with the lower surface of the steel plate strip, and the height of the first protrusion is greater than the height of the second protrusion; or,

[0013] the top of the web of the inverted T-shaped steel is formed with a second special-shaped cutout, adjacent second special-shaped cutouts are mirror images of each other,

[0014] two sides of each second special-shaped cutout are respectively formed with a third protrusion and a fourth protrusion, the second protrusion, the second special-shaped cutout and the upper surface of the steel plate strip are connected with the UHPC plate, the upper surface of the fourth protrusion is connected with the lower surface of the steel plate strip, and the height of the third protrusion is greater than the height of the fourth protrusion.

[0015] In an optional embodiment, the top of the web of the inverted T-shaped steel is formed with a first special-shaped cutout, adjacent first special-shaped cutouts are mirror images of each other,

[0016] two sides of each first special-shaped cutout are respectively formed with a first protrusion and a second protrusion, the first protrusion, the first special-shaped cutout and the upper surface of the steel plate are connected with the UHPC plate, the upper surface of the second protrusion is connected with the lower surface of the steel plate, and the height of the first protrusion is greater than the height of the second protrusion, wherein the first protrusion passes through the through hole; or,

[0017] the top of the web of the inverted T-shaped steel is formed with a second special-shaped cutout, adjacent second special-shaped cutouts are mirror images of each other,

[0018] Two sides of each second irregular cutout are formed with a third protrusion and a fourth protrusion respectively, the second protrusion, the second irregular cutout, and the upper surface of the steel plate are connected with the UHPC plate, the upper surface of the fourth protrusion is connected with the lower surface of the steel plate, the height of the third protrusion is greater than the height of the fourth protrusion, and the first protrusion passes through the through hole.

[0019] In an optional embodiment, the first irregular cutout is trapezoidal, and the second irregular cutout is circular arc-shaped.

[0020] In an optional embodiment, the lower surface of the steel plate member is provided with a plurality of first shear connectors, and the plurality of first shear connectors are connected with the thickened portion.

[0021] In an optional embodiment, the upper surface of the steel plate member is provided with a plurality of second shear connectors for connecting with the UHPC plate.

[0022] In an optional embodiment, the inverted T-shaped steel is a finished T-shaped steel or an H-shaped steel cut into two parts.

[0023] In an optional embodiment, a single-layer steel mesh is embedded in the UHPC plate, and the steel mesh is formed by staggered laying of transverse steel bars and longitudinal steel bars.

[0024] The bridge deck plate of the present application has the following beneficial effects:

[0025] (1) The stress of the bridge deck plate is relatively complex, and the stress behavior is divided into three systems, the first system is the main beam system, the second system is the bridge deck system, and the third system is the cover plate system, in the conventional orthotropic steel bridge deck, the first system is the steel main beam, the second system is the steel bridge deck plate with U ribs, and the third system is the pure steel plate, in the present application, the first system is the combined structure of the steel main beam and the combined bridge deck plate, the second system is the combined bridge deck structure of the inverted T-shaped steel and the UHPC plate, and the third system is the combined structure of the steel strip or the steel plate and the UHPC plate, all the three systems are subjected to stress of the combined structure, the combined structure is widely used in bridge structures, and the reason is that the combined structure can fully exert the advantages of each material to achieve the effect of 1+1>2, the present application adopts the combined structure in the stress of the three systems, and the mechanical advantage and economic advantage are obvious.

[0026] (2) In the bridge inverted T-shaped steel-UHPC combined plate, the upper flange plate of the H-shaped steel is cancelled, the inverted T-shaped steel (the inverted T-shaped steel is a finished T-shaped steel or an H-shaped steel cut into two parts) is used, the weight of the longitudinal rib of the UHPC combined plate is reduced by more than 1 / 3, so that the self weight of the inverted T-shaped steel-UHPC system is lighter, and thus it can be applied to suspension bridges and other large-span bridges which are sensitive to self weight height.

[0027] (3) The utility model discloses a bridge inverted T type steel - UHPC combination board, the upper portion cutting of the web of inverted T type steel forms first convex part, second convex part and special-shaped cutout, and first convex part is used for anchoring, and special-shaped cutout forms mortise and tenon to transfer horizontal shear, and steel sheet piece (steel sheet strip or whole steel plate) is set up on second convex part, can share the horizontal shear and vertical shear between UHPC board and inverted T type steel web simultaneously, and the stress performance of structure is improved.

[0028] (4) The web of inverted T type steel is inserted into UHPC board in the utility model, and UHPC board is thickened at the connecting place with the web and forms thickening part, can guarantee that shear transmission is reliable and the required insertion depth, also can guarantee that the layout of transverse steel bar is not affected, it is worth mentioning that the bolt of connecting the thickening part of UHPC below can be welded below steel sheet piece, guarantees the stress performance of thickening section UHPC board. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0030] Figure 1 The structure schematic diagram of inverted T type steel - UHPC combination board of the UHPC board bottom surface using transverse steel sheet strip (bolt is not laid below thickening section steel sheet strip) provided by an embodiment of the utility model.

[0031] Figure 2 The structure schematic diagram of inverted T type steel - UHPC combination board of the UHPC board bottom surface using whole steel plate (bolt is not laid below thickening section steel plate) provided by an embodiment of the utility model.

[0032] Figure 3 The structure schematic diagram of whole steel plate in Figure 2 .

[0033] Figure 4 The A-A direction sectional view in Figure 1 , Figure 2 .

[0034] Figure 5 The B-B direction sectional view in Figure 1 .

[0035] Figure 6 The B-B direction sectional view in Figure 2 .

[0036] Figure 7 The B-B direction sectional view in Figure 1Figure 6 is a C-C sectional view (the cutout is the first profiled cutout).

[0037] Figure 8 Figure 7 is a C-C sectional view (the cutout is the second profiled cutout). Figure 2

[0038] Figure 9 Figure 1 Figure 2 Figure 8 is a side structural view of the T-shaped steel (the cutout is the first profiled cutout).

[0039] Figure 10 Figure 9 is a side structural view of the T-shaped steel (the cutout is the second profiled cutout). Figure 1

[0040] Figure 11 Figure 2

[0041] Figure 12 Figure 1 Figure 2 Figure 10 is a side structural view of the T-shaped steel (the cutout is the second profiled cutout).

[0042] Figure 13 Figure 11 is a D-D sectional view. Figure 1

[0043] Figure 14 Figure 2

[0044] Figure 15 Figure 12 is a structural schematic view of the inverted T-shaped steel-UHPC combined plate provided by an embodiment of the present application, in which the bottom surface of the UHPC plate adopts the transverse steel lath (the thickened section steel lath is arranged below the bolt nail).

[0045] Figure 16 Figure 13 is a structural schematic view of the inverted T-shaped steel-UHPC combined plate provided by an embodiment of the present application, in which the bottom surface of the UHPC plate adopts the whole steel plate (the bolt nail is arranged below the thickened section steel plate).

[0046] Figure 17 Figure 14 is an A-A sectional view. Figure 15

[0047] Figure 18 Figure 16

[0048] Figure 19 Figure 15

[0049] Figure 20 Figure 16 ​​​​​​​​​​​​​​​​​​

[0050] Figure 21 For Figure 15 Cross-sectional view along C-C.

[0051] Figure 22 For Figure 16 Cross-sectional view along C-C.

[0052] Figure 23 For Figure 15 Cross-sectional view along D-D.

[0053] Figure 24 For Figure 16 Cross-sectional view along D-D.

[0054] Figure 25 It is a schematic view of the inverted T-shaped steel adopting the H-shaped steel non-destructive cutting (the cutout is a third special-shaped cutout) provided in an embodiment of the present application.

[0055] Wherein, the reference signs are as follows: 1-inverted T-shaped steel, 101-web, 102-first protruding part, 103-second protruding part, 104-first special-shaped cutout, 105-second special-shaped cutout, 106-third protruding part, 107-fourth protruding part, 108-fifth protruding part, 109-third special-shaped cutout; 2-UHPC plate; 3-steel strip; 4-steel plate; 5-through hole; 6-shear connecting piece; 7-reinforcing mesh, 701-transverse reinforcing bar, 702-longitudinal reinforcing bar; 8-thickened part; 9-paving layer; 10-second shear connecting piece. DETAILED DESCRIPTION

[0056] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0057] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, and are only for the convenience of description, and cannot be understood as a limitation on the technical solutions. The terms "first", "second" are only for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, and the meaning of "several" is any number including one, unless otherwise explicitly specified.

[0058] Embodiment One

[0059] Please refer to the attached drawings Figure 1 4 -5, 7, 9-10, 12-13, 15, 17, 19, 21, 23, the purpose of the embodiment is to provide a bridge inverted T-shaped steel-UHPC composite plate, comprising: a UHPC plate 2 and a plurality of inverted T-shaped steel 1 arranged along the longitudinal bridge direction, the UHPC plate 2 is arranged on the plurality of inverted T-shaped steel 1 arranged along the longitudinal bridge direction; A steel plate piece is arranged between the bottom of the UHPC plate 2 and the upper part of the web plate 101 of the inverted T-shaped steel; The upper surface of the steel plate piece is fixedly connected with the UHPC plate 2, and the lower surface of the steel plate piece is connected with the web plate 101, which is only placed on the web plate 101 or temporarily fixed. The inverted T-shaped steel-UHPC composite plate cancels the upper flange plate of the H-shaped steel, uses the inverted T-shaped steel 1, reduces the longitudinal rib weight of the UHPC composite plate by more than 1 / 3, so that the dead weight of the inverted T-shaped steel-UHPC system is lighter, and thus can be applied to suspension bridges and other large-span bridges sensitive to self-weight. The inverted T-shaped steel 1 is a finished T-shaped steel or H-shaped steel cut in half, and the cutting method of the H-shaped steel can be lossless cutting without generating edge scraps. In an optional embodiment, the upper part of the web plate 101 of the inverted T-shaped steel is cut to form a special-shaped notch and a protrusion, and the special-shaped notch and the protrusion can be used for connection with the UHPC plate 2 or the steel plate piece; In a preferred embodiment, the bottom plane of the special-shaped notch is connected with a steel strip 3 or a steel plate 4, and the top plane of the protrusion is connected with the UHPC plate 2.

[0060] ​In this embodiment, the steel plate member is a steel strip 3, and a plurality of steel strips 3 are arranged along the transverse direction of the bridge. The top of the web 101 of the inverted T-shaped steel 1 is formed with a first special-shaped cutout 104, and adjacent first special-shaped cutouts 104 are mirror images. Each first special-shaped cutout 104 is formed with a first protrusion 102 and a second protrusion 103 on the two sides, respectively. The upper surface of the first protrusion 102, the first special-shaped cutout 104, and the upper surface of the steel strip 3 are connected to the UHPC plate 2. The upper surface of the second protrusion 103 is connected to the lower surface of the steel strip 3. The height of the first protrusion 102 is greater than the height of the second protrusion 103. Alternatively, the top of the web 101 of the inverted T-shaped steel 1 is formed with a second special-shaped cutout 105, and adjacent second special-shaped cutouts 105 are mirror images. Each second special-shaped cutout 105 is formed with a third protrusion 106 and a fourth protrusion 107 on the two sides, respectively. The upper surface of the second protrusion 106, the second special-shaped cutout 106, and the upper surface of the steel strip 3 are connected to the UHPC plate 2. The upper surface of the fourth protrusion 107 is connected to the lower surface of the steel strip 3. The height of the third protrusion 106 is greater than the height of the fourth protrusion 107. The upper part of the web 101 of the T-shaped steel 1 is cut to form a first protruding portion 102 (third protrusion 106), a second protruding portion 103 (fourth protrusion 107), and a special-shaped cutout. The first protruding portion 102 (third protrusion 106) is used for anchoring. The two special-shaped cutouts and the UHPC plate 2 form a mortise and tenon joint to transfer horizontal shear force. The steel strip 3 is arranged on the second protruding portion 103 (fourth protrusion 107) and can simultaneously share the horizontal shear force and vertical shear force between the UHPC plate and the web 101 of the inverted T-shaped steel 1, thereby improving the stress performance of the structure. Preferably, the first special-shaped cutout 104 is trapezoidal, and the second special-shaped cutout 106 is circular arc-shaped.

[0061] Further, the UHPC plate 2 is thickened at the connection with the web 101 to form a thickened portion 8. The lower surface of the steel strip 3 is provided with a plurality of first shear connectors 10, and the plurality of first shear connectors 10 are connected to the thickened portion 8. The web 101 of the inverted T-shaped steel 1 is inserted into the UHPC plate 2. The UHPC plate 2 is thickened at the connection with the web 101 to form a thickened portion 8, which can ensure reliable shear force transmission and the required insertion depth, and can also ensure that the transverse steel bars are not affected. A stud is welded below the steel strip 3 and connected to the lower UHPC thickened portion 8, thereby ensuring the stress performance of the thickened UHPC plate. The overall thickness of the UHPC plate 2 is 30 mm to 140 mm. Since the web 101 of the inverted T-shaped steel 1 needs to be inserted into the UHPC plate 2, in order to ensure reliable shear force transmission, a certain depth of insertion is required. However, the UHPC plate 2 is relatively thin, and too much insertion depth will affect the arrangement of the transverse steel bars. In addition, if the UHPC plate 2 above the web 101 of the inverted T-shaped steel 1 is thin, shear failure is likely to occur. Therefore, the thickened portion 8 is added.

[0062] In addition, the upper surface of the steel strip 3 is provided with a plurality of second shear connectors 6 for connecting with the UHPC plate 2. A single-layer steel bar mesh 7 is pre-embedded in the UHPC plate 2, and the steel bar mesh 7 is staggered by transverse steel bars 701 and longitudinal steel bars 702.

[0063] Embodiment two

[0064] Please refer to the attached drawings Figures 2-4 , 6, 8-9, 11-12, 14, 16, 18, 20, 22, 24, the purpose of the embodiment is to provide a bridge inverted T-shaped steel-UHPC composite plate, comprising: a UHPC plate 2 and a plurality of inverted T-shaped steel 1 arranged along the longitudinal bridge direction, the UHPC plate 2 is arranged on the plurality of inverted T-shaped steel 1 arranged along the longitudinal bridge direction; a steel plate piece is arranged between the bottom of the UHPC plate 2 and the upper part of the web 101 of the inverted T-shaped steel; the upper surface of the steel plate piece is fixedly connected with the UHPC plate 2, and the lower surface of the steel plate piece is connected with the web 101. The inverted T-shaped steel-UHPC composite plate cancels the upper flange plate of the H-shaped steel, uses the inverted T-shaped steel 1, reduces the longitudinal rib weight of the UHPC composite plate by more than 1 / 3, so that the self weight of the inverted T-shaped steel-UHPC system is lighter, and thus can be applied to suspension bridges and other long-span bridges which are sensitive to self weight. The inverted T-shaped steel 1 is a finished T-shaped steel cut or a H-shaped steel cut into two, and the cutting method of the H-shaped steel is lossless cutting, which will not produce edge and corner materials.

[0065] In this embodiment, the steel plate member is a whole steel plate 4, and a plurality of groups of through holes 5 are arranged on the steel plate 4. The top of the web 101 of the inverted T-shaped steel 1 is formed with a first special-shaped cutout 104, and adjacent first special-shaped cutouts 104 are mirror images. The two sides of each first special-shaped cutout 104 are respectively formed with a first protrusion 102 and a second protrusion 103. The first protrusion 102, the first special-shaped cutout 104, and the upper surface of the steel plate 4 are connected with the UHPC plate 2. The upper surface of the second protrusion 103 is connected with the lower surface of the steel plate 4. The height of the first protrusion 102 is greater than the height of the second protrusion 103. The first protrusion 102 passes through the through hole 5. Alternatively, the top of the web 101 of the inverted T-shaped steel 1 is formed with a second special-shaped cutout 105, and adjacent second special-shaped cutouts 105 are mirror images. The two sides of each second special-shaped cutout 105 are respectively formed with a third protrusion 106 and a fourth protrusion 107. The second protrusion 106, the second special-shaped cutout 106, and the upper surface of the steel plate 4 are connected with the UHPC plate 2. The upper surface of the fourth protrusion 107 is connected with the lower surface of the steel plate 4. The height of the third protrusion 106 is greater than the height of the fourth protrusion 107. The first protrusion 102 passes through the through hole 5. The upper part of the web 101 of the T-shaped steel 1 is cut to form a first protruding portion 102 (third protrusion 106), a second protruding portion 103 (fourth protrusion 107), and a special-shaped cutout. The first protruding portion 102 (third protrusion 106) is used for anchoring. The two special-shaped cutouts form a mortise and tenon joint with the UHPC plate 2 to transfer horizontal shear force. The whole steel plate 4 is arranged on the second protruding portion 103 (fourth protrusion 107) to simultaneously share the horizontal shear force and vertical shear force between the UHPC plate 2 and the web 101 of the inverted T-shaped steel 1, thereby improving the stress performance of the structure. Preferably, the first special-shaped cutout 104 is trapezoidal, and the second special-shaped cutout 106 is circular arc-shaped. The through hole 5 is preferably an oval hole or a square hole. The presence of the through hole 5 facilitates the first protruding portion 102 (third protrusion 106) on the web 101 to pass through the steel plate 4 and be fixedly connected with the UHPC plate 2. The through hole 5 cannot be too large, and the width of the thickened portion 8 at the connection between the UHPC plate 2 and the web 101 is not suitable to be greater than the width of the through hole 5. The through hole 5 cannot be too small to facilitate the first protruding portion 102 (third protrusion 106) to pass through, while meeting the requirement that UHPC easily flows into the thickened portion 8 below the steel plate 4 when the prefabricated bridge deck is prepared.

[0066] Furthermore, the connection between the UHPC plate 2 and the web 101 is thickened to form a thickened section 8; multiple first shear connectors 10 are provided on the lower surface of the steel plate 4, and the multiple first shear connectors 10 connect to the thickened section 8. The web 101 of the inverted T-shaped steel 1 is inserted into the UHPC plate 2, and the thickening treatment at the connection between the UHPC plate 2 and the web 101 forms the thickened section 8, which can ensure reliable shear force transmission and the required insertion depth, and also ensure that it does not affect the layout of the transverse reinforcement; studs are welded below the steel plate 4 to connect with the lower UHPC thickened section 8 to ensure the load-bearing performance of the thickened section of the UHPC plate 2. The overall thickness of the UHPC plate 2 is 30mm to 140mm. Since the web 101 of the inverted T-shaped steel 1 needs to be inserted into the UHPC plate 2, a certain depth is required to ensure reliable shear force transmission. However, the UHPC plate is relatively thin, and too much insertion depth will affect the layout of the transverse reinforcement. At the same time, if the UHPC plate 2 above the web 101 of the inverted T-shaped steel 1 is relatively thin, it is prone to shear failure. Therefore, a thickened part 8 is added.

[0067] In addition, the upper surface of the whole steel plate 4 is provided with multiple second shear connectors 6 for connecting with the UHPC plate 2. A single layer of steel mesh 7 is pre-embedded in the UHPC plate 2, which is composed of transverse steel bars 701 and longitudinal steel bars 702 laid alternately.

[0068] Finally, in the optional embodiments, as shown in the appendix Figure 25 As shown, an inverted T-shaped steel 1 is formed by directly cutting an H-beam in half to create two webs 101, each with a fifth protrusion 108 and a third irregular cut 109. This cutting method avoids producing scrap compared to cutting with the first irregular cut 104 and the second irregular cut 105. In use, the steel strip 3 or a whole steel plate 4 with through holes 5 is placed on the bottom plane of the third irregular cut 109, and the fifth protrusion 108 (which passes through the through hole 5 when using the steel plate 4) is connected to the UHPC plate 2. The connection between the UHPC plate 2 and the web 101 is thickened to form a thickened part 8, and a first shear connector 10 connected to the thickened part 8 is welded to the lower surface of the steel strip 3 or the whole steel plate 4 with through holes 5.

[0069] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bridge inverted T-shaped steel-UHPC composite slab, characterized in that, The application relates to a bridge structure, which comprises the following components: a UHPC plate (2) and a plurality of inverted T-shaped steels (1) arranged along the longitudinal direction of the bridge, the UHPC plate (2) being arranged on the plurality of inverted T-shaped steels (1) arranged along the longitudinal direction of the bridge; a steel plate piece is arranged between the bottom of the UHPC plate (2) and the upper part of the web (101) of the inverted T-shaped steel; the upper surface of the steel plate piece is fixedly connected with the UHPC plate (2), and the lower surface of the steel plate piece is connected with the web (101); the top of the web (101) is formed with a special-shaped cutout; the connection part between the UHPC plate (2) and the web (101) is thickened to form a thickened part (8). The steel plate piece is a steel strip (3), and a plurality of steel strips (3) are arranged along the transverse direction of the bridge. The steel plate piece is a whole steel plate (4), and a plurality of groups of through holes (5) are arranged on the steel plate (4), and each group of through holes (5) is arranged along the transverse direction of the bridge. The top of the web (101) of the inverted T-shaped steel (1) is formed with a first special-shaped cutout (104), and adjacent first special-shaped cutouts (104) are mirror images of each other, 2. The inverted T steel-UHPC composite slab for bridge according to claim 1, characterized in that, the two sides of each first special-shaped cutout (104) are respectively formed with a first protrusion (102) and a second protrusion (103), the upper surface of the first protrusion (102), the first special-shaped cutout (104) and the steel strip (3) are connected with the UHPC plate (2), the upper surface of the second protrusion (103) is connected with the lower surface of the steel strip (3), and the height of the first protrusion (102) is greater than the height of the second protrusion (103); or 3. The inverted T steel-UHPC composite slab for bridge according to claim 1, characterized in that, the top of the web (101) of the inverted T-shaped steel (1) is formed with a second special-shaped cutout (105), and adjacent second special-shaped cutouts (105) are mirror images of each other, 4. The inverted T steel-UHPC composite slab for bridge according to claim 2, characterized in that, the two sides of each second special-shaped cutout (105) are respectively formed with a third protrusion (106) and a fourth protrusion (107), the upper surface of the second protrusion (103), the second special-shaped cutout (105) and the steel strip (3) are connected with the UHPC plate (2), the upper surface of the fourth protrusion (107) is connected with the lower surface of the steel strip (3), and the height of the third protrusion (106) is greater than the height of the fourth protrusion (107). The top of the web (101) of the inverted T-shaped steel (1) is formed with a first special-shaped cutout (104), and adjacent first special-shaped cutouts (104) are mirror images of each other, the two sides of each first special-shaped cutout (104) are respectively formed with a first protrusion (102) and a second protrusion (103), the upper surface of the first protrusion (102), the first special-shaped cutout (104) and the steel plate (4) are connected with the UHPC plate (2), the upper surface of the second protrusion (103) is connected with the lower surface of the steel plate (4), and the height of the first protrusion (102) is greater than the height of the second protrusion (103), wherein the first protrusion (102) penetrates through the through hole (5); or the top of the web (101) of the inverted T-shaped steel (1) is formed with a second special-shaped cutout (105), and adjacent second special-shaped cutouts (105) are mirror images of each other, 5. The inverted T steel-UHPC composite slab for bridge according to claim 3, characterized in that, ​ ​ ​ Two sides of each second irregular cutout (105) are respectively formed with a third protrusion (106) and a fourth protrusion (107), the second protrusion (103), the second irregular cutout (105), and the upper surface of the steel plate (4) are connected with the UHPC plate (2), the upper surface of the fourth protrusion (107) is connected with the lower surface of the steel plate (4), the height of the third protrusion (106) is greater than the height of the fourth protrusion (107), and the first protrusion (102) passes through the through hole (5). 6.The inverted T-shaped steel-UHPC composite slab for bridge according to claim 4 or 5, characterized in that, The first irregular cutout (104) is trapezoidal, and the second irregular cutout (105) is circular arc-shaped.

7. The inverted T-shaped steel-UHPC composite plate for bridges according to claim 1, characterized in that, The lower surface of the steel plate member is provided with a plurality of first shear connectors (10), and the plurality of first shear connectors (10) are connected with the thickened portion (8).

8. The inverted T steel-UHPC composite slab for bridge according to claim 1, characterized in that, The upper surface of the steel plate member is provided with a plurality of second shear connectors (6) for connecting with the UHPC plate (2).

9. The inverted T steel-UHPC composite slab for bridge according to claim 1, characterized in that, The inverted T-shaped steel (1) is a finished T-shaped steel or H-shaped steel that is cut in half.

10. The inverted T steel-UHPC composite slab for bridge according to claim 1, characterized in that, A single-layer steel bar mesh (7) is pre-embedded in the UHPC plate (2), and the steel bar mesh (7) is formed by staggered laying of transverse steel bars (701) and longitudinal steel bars (702).

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