CN110528778A - A kind of Steel-concrete Combined Beam Structures that Novel tensile is cut and its manufacture craft - Google Patents
A kind of Steel-concrete Combined Beam Structures that Novel tensile is cut and its manufacture craft Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 123
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 225
- 239000010959 steel Substances 0.000 claims abstract description 225
- 230000002787 reinforcement Effects 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 38
- 230000003014 reinforcing effect Effects 0.000 claims description 75
- 238000005452 bending Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 35
- 239000011440 grout Substances 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 5
- 238000009417 prefabrication Methods 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims 2
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- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005422 blasting Methods 0.000 claims 1
- 238000005266 casting Methods 0.000 claims 1
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- 230000003628 erosive effect Effects 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
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- 239000002689 soil Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 35
- 239000004593 Epoxy Substances 0.000 description 9
- 239000004570 mortar (masonry) Substances 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 5
- 238000009415 formwork Methods 0.000 description 5
- 239000011178 precast concrete Substances 0.000 description 5
- 239000011372 high-strength concrete Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011376 self-consolidating concrete Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
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- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
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Abstract
一种新型抗拉剪的钢‑混凝土组合梁结构，包括混凝土左板、混凝土右板、钢梁、限制定位装置、螺杆、上固定装置、下固定装置、连接器、抗剪件、上部纵向钢筋、下部纵向钢筋和灌浆材料，抗剪件连接于钢梁上翼缘上表面，限制定位装置连接于钢梁上翼缘的边缘，与钢梁上翼缘上表面形成开口空腔；混凝土左板和混凝土右板通过螺杆、上固定装置、及下固定装置和连接器连接于钢梁上；混凝土左板、混凝土右板、连接器与限制定位装置通过灌浆料材料粘结成整体形成新型抗拉剪的钢‑混凝土组合梁结构。以及提供一种新型抗拉剪的钢‑混凝土组合梁结构的制作工艺。本发明的结构在多轴外荷载作用下具有较好的抗剪、抗拔承载力，可以应用于各种组合梁桥工程中。
A new steel-concrete composite beam structure resistant to tensile shear, including concrete left slab, concrete right slab, steel beam, limiting positioning device, screw rod, upper fixing device, lower fixing device, connector, shear member, upper longitudinal reinforcement , the lower longitudinal reinforcement and grouting material, the shear member is connected to the upper surface of the upper flange of the steel beam, and the limiting positioning device is connected to the edge of the upper flange of the steel beam, forming an open cavity with the upper surface of the upper flange of the steel beam; the concrete left plate and the concrete right plate pass through the screw , the upper fixing device, the lower fixing device and the connector are connected to the steel beam; the concrete left slab, the concrete right slab, the connector and the limiting positioning device are bonded together by grouting materials to form a new steel-concrete combination of tensile shear resistance beam structure. As well as providing a manufacturing process for a novel tensile shear resistant steel-concrete composite beam structure. The structure of the invention has better shear and pull-out bearing capacity under the action of multi-axis external loads, and can be applied to various composite beam bridge projects.
Description
技术领域technical field
本发明涉及桥梁工程的建筑细部及其构造和施工领域，尤其是一种新型抗拉剪的钢-混凝土组合梁结构及其制作工艺。The invention relates to the architectural details of bridge engineering and its structure and construction fields, in particular to a novel tensile shear resistant steel-concrete composite beam structure and its manufacturing process.
背景技术Background technique
组合结构在桥梁工程中的应用，从最初的组合梁发展到现在的组合柱以及更为复杂的组合结构缩塔和混合梁等结构，极大的丰富了传统的结构形式。钢-混凝土组合梁桥通过在下部的钢梁和上部的混凝土翼缘板混凝土板之间设置剪力连接件以抵抗两者在交界面处的掀起及相对滑移，使两者成为一个整体而共同工作，钢板和砼桥面板组合后的力学性能、整体性能、抗震性能均超过了材料各自的性能，钢材和钢筋混凝土材料有机结合在一起，可以弥补各自材料的缺点。目前在组合结构中最常用的连接件是栓钉连接件和开孔板连接件(PBL连接件)，开孔板连接件的特点是强度高、刚度大，但是其对混凝土部分有较大削弱，较易导致混凝土部分出现裂缝。对于一般构造开孔板连接件在极限状态是孔中混凝土的剪切破坏，其破坏是脆性破坏；对于栓钉连接件，在极限状态一般是栓钉根部的剪切破坏，其破坏是延性破坏。栓钉连接件可以在钢结构表面灵活布置，并且焊接栓钉连接件有专门设备，施工较方便，在组合结构中焊钉连接件得到广泛的应用。The application of composite structures in bridge engineering, from the initial composite beams to the current composite columns and more complex composite structures such as reduced towers and composite beams, has greatly enriched the traditional structural forms. Steel-concrete composite girder bridges set shear connectors between the lower steel girder and the upper concrete flange slab to resist the lifting and relative sliding of the two at the interface, making the two as a whole Working together, the mechanical properties, overall performance and seismic performance of the combined steel plate and concrete bridge deck exceed the performance of the materials alone. The organic combination of steel and reinforced concrete materials can make up for the shortcomings of their respective materials. At present, the most commonly used connectors in composite structures are stud connectors and perforated plate connectors (PBL connectors). The perforated board connectors are characterized by high strength and high rigidity, but they have a large weakening of the concrete part. , more likely to cause cracks in the concrete part. For general structural perforated plate connectors, the limit state is shear failure of the concrete in the hole, and the damage is brittle failure; for stud connectors, the limit state is generally shear failure at the root of the stud, and the damage is ductile failure . The stud connectors can be flexibly arranged on the surface of the steel structure, and there are special equipment for welding the stud connectors, which makes the construction more convenient, and the welded stud connectors are widely used in composite structures.
在组合梁抗弯分析中，焊钉连接件仅承受剪力作用，因而目前的研究主要集中研究剪力连接件的抗剪性能。目前在一些规范和标准中也给出了其抗剪承载力的设计公式。然而在组合梁承受扭矩或者承受局部荷载或支座负弯矩处时，连接件会承受拉拔力和剪切力的共同作用。目前组合结构桥梁主梁逐渐趋于采用槽形宽幅单主梁结构，连接件将承受由于桥面板横向弯曲而产生的较大的拉拔作用力。同样在混合梁的结合部以及组合索塔部位，连接件也会承受拉、剪组合作用。如果仅仅考虑焊钉连接件的抗剪受力，将会造成安全隐患。In the bending analysis of composite beams, the stud connectors only bear the shear force, so the current research mainly focuses on the shear performance of the shear connectors. At present, the design formula of its shear bearing capacity is also given in some codes and standards. However, when the composite beam is subjected to torque or local load or negative bending moment of the support, the connecting piece will bear the combined action of pull-out force and shear force. At present, the main girder of composite structure bridges gradually tends to adopt the groove-shaped wide single girder structure, and the connectors will bear the large pulling force generated by the transverse bending of the bridge deck. Similarly, at the junction of the composite beam and the composite cable tower, the connecting piece will also bear the combination of tension and shear. If only the shear force of the stud connection is considered, it will cause safety hazards.
发明内容Contents of the invention
为了克服已有上述可能出现的问题，本发明提出一种新型抗拉剪的钢-混凝土组合梁结构及其制作工艺，其改进了传统组合梁的结构形式，在多轴外荷载作用下，该种组合梁具有较好的抗剪、抗拔承载力，使钢梁和混凝土板组成一个有机的整体，可以应用于各种组合梁桥工程中。In order to overcome the above-mentioned possible problems, the present invention proposes a new steel-concrete composite beam structure with tensile shear resistance and its manufacturing process, which improves the structural form of traditional composite beams. Under the action of multi-axial external loads, the This kind of composite beam has good shear and pull-out bearing capacity, which makes the steel beam and concrete slab form an organic whole, and can be applied to various composite beam bridge projects.
本发明解决其技术问题所采用的技术方案是：The technical solution adopted by the present invention to solve its technical problems is:
一种新型抗拉剪的钢-混凝土组合梁结构，包括混凝土左板、混凝土右板、钢梁、限制定位装置、螺杆、上固定装置、下固定装置、连接器、抗剪件、上部纵向钢筋、下部纵向钢筋和灌浆材料，所述抗剪件连接于所述钢梁上翼缘上表面，所述限制定位装置连接于所述钢梁上翼缘的边缘，所述限制定位装置与所述钢梁上翼缘上表面形成开口空腔；所述混凝土左板和所述混凝土右板通过所述螺杆、所述上固定装置、所述及下固定装置和连接器连接于所述钢梁上；所述混凝土左板、混凝土右板、连接器与限制定位装置通过所述灌浆料材料粘结成整体形成新型抗拉剪的钢-混凝土组合梁结构。A new tensile and shear steel-concrete composite beam structure, including concrete left slab, concrete right slab, steel beam, limiting positioning device, screw rod, upper fixing device, lower fixing device, connector, shear parts, upper longitudinal reinforcement , the lower longitudinal reinforcement and grouting material, the shear member is connected to the upper surface of the upper flange of the steel beam, the limiting positioning device is connected to the edge of the upper flange of the steel beam, and the limiting positioning device is connected to the upper flange of the steel beam An open cavity is formed on the surface; the concrete left slab and the concrete right slab are connected to the steel beam through the screw, the upper fixing device, the lower fixing device and the connector; the concrete left slab , the concrete right plate, the connector and the limiting positioning device are bonded together through the grouting material to form a new tensile shear resistant steel-concrete composite beam structure.
进一步，所述混凝土左板包括混凝土板和所述左上部钢筋以及所述左下部钢筋；所述左上部钢筋和左下部钢筋为所述混凝土板配筋中一部分上部横向钢筋和下部横向钢筋的外伸部分，所述左上部钢筋的钢筋端向下，在钢筋端部处设置所述钢筋螺纹；Further, the concrete left slab includes a concrete slab and the left upper reinforcement and the left lower reinforcement; the left upper reinforcement and the left lower reinforcement are the outer parts of a part of the upper transverse reinforcement and the lower transverse reinforcement in the reinforcement of the concrete slab extension part, the steel bar end of the left upper steel bar is downward, and the steel bar thread is set at the end of the steel bar;
所述混凝土右板包括混凝土板和所述右上部钢筋以及所述右下部钢筋；所述右上部钢筋和右下部钢筋为所述混凝土板配筋中一部分上部横向钢筋和下部横向钢筋的外伸部分，所述右上部钢筋的钢筋端向下，在钢筋端部处设置所述钢筋螺纹；The concrete right slab includes a concrete slab, the upper right reinforcement and the lower right reinforcement; the upper right reinforcement and the lower right reinforcement are the overhanging parts of a part of the upper transverse reinforcement and the lower transverse reinforcement in the reinforcement of the concrete slab , the reinforcing bar end of the upper right reinforcing bar is downward, and the reinforcing bar thread is set at the reinforcing bar end;
所述左上部钢筋和右上部钢筋相互交错布置，所述左上部钢筋的钢筋螺纹与一个连接器的上端螺纹连接，所述右上部钢筋的钢筋螺纹与另一个连接器的上端螺纹连接。The left upper reinforcement and the right upper reinforcement are alternately arranged, the reinforcement thread of the left upper reinforcement is threaded with the upper end of one connector, and the reinforcement thread of the right upper reinforcement is threaded with the upper end of another connector.
所述左上部钢筋包括钢筋和钢筋螺纹，所述左上部钢筋通过90°冷弯工艺形成“L”形状，钢筋端向下，在钢筋端部处制作所述钢筋螺纹，冷弯工艺按相关标准施工；The upper left steel bar includes a steel bar and a steel bar thread, and the left upper steel bar is formed into an "L" shape through a 90° cold-bending process, with the end of the steel bar facing down, and the steel bar thread is made at the end of the steel bar. construction;
所述左下部钢筋通过180°冷弯工艺后，钢筋端部成倒“U”字形，钢筋端头向下。After the steel bar at the lower left part passes through the 180° cold bending process, the end of the steel bar becomes an inverted "U" shape, and the end of the steel bar is downward.
所述右上部钢筋包括钢筋和钢筋螺纹，所述右上部钢筋通过90°冷弯工艺形成“L”形状，钢筋端向下，在钢筋端部处制作所述钢筋螺纹，冷弯工艺按相关标准施工；The upper right reinforcing bar includes a reinforcing bar and a reinforcing bar thread, and the upper right reinforcing bar forms an "L" shape through a 90° cold-bending process, with the end of the reinforcing bar facing down, and the reinforcing bar thread is made at the end of the reinforcing bar, and the cold-forming process is in accordance with relevant standards construction;
优先的，所述右下部钢筋通过180°冷弯工艺后，钢筋端部成倒“U”字形，钢筋端头向下，冷弯工艺按相关标准施工；Preferably, after the lower right steel bar passes through the 180° cold bending process, the end of the steel bar becomes an inverted "U" shape, the end of the steel bar is downward, and the cold bending process is carried out according to relevant standards;
进一步，所述钢梁上开设供所述螺杆穿过的钢梁螺孔，所述钢梁螺孔包括第一钢梁螺孔和第二钢梁螺孔，所述第一钢梁螺孔与左上部钢筋下垂段位置对齐，所述第二钢梁螺孔与右上部钢筋下垂段位置对齐。Further, the steel beam is provided with a steel beam screw hole for the screw to pass through, and the steel beam screw hole includes a first steel beam screw hole and a second steel beam screw hole, and the first steel beam screw hole and the second steel beam screw hole The position of the hanging section of the upper left steel bar is aligned, and the screw hole of the second steel beam is aligned with the position of the hanging section of the upper right steel bar.
所述连接器用于连接所述左上部钢筋或所述右上部钢筋和所述螺杆，所述内孔螺纹与所述左上部钢筋或所述右上部钢筋下端部的所述钢筋螺纹匹配，所述螺杆和所述上固定装置以及所述下固定装置组成连接装置，通过所述连接器将所述左上部钢筋或所述右上部钢筋于所述钢梁相连接。The connector is used to connect the upper left steel bar or the upper right steel bar and the screw rod, the inner thread is matched with the steel bar thread at the lower end of the upper left steel bar or the upper right steel bar, the The screw rod, the upper fixing device and the lower fixing device form a connection device, and the left upper steel bar or the right upper steel bar is connected to the steel beam through the connector.
所述螺杆上端和下端均有螺纹，螺纹相同，螺纹与所述连接器内控螺纹匹配，所述上固定装置和所述下固定装置均包含一个垫片和一个螺母，螺母与所述螺杆上的螺纹匹配。Both the upper end and the lower end of the screw have threads, the threads are the same, and the threads are matched with the internal control threads of the connector. Both the upper fixing device and the lower fixing device include a washer and a nut, and the nut is connected to the screw on the screw. thread to match.
优先的，所述混凝土板优先采用高强度混凝土。Preferably, the concrete slab is preferably made of high-strength concrete.
优先的，所述钢梁采用耐腐蚀、耐高温的合金钢材。Preferably, the steel beam is made of corrosion-resistant and high-temperature-resistant alloy steel.
所述第一钢梁螺孔和所述第二钢梁螺孔直径比所述螺杆直径大1～2mm。The diameters of the first steel beam screw holes and the second steel beam screw holes are 1-2mm larger than the diameter of the screw rod.
进一步，所述限制定位装置通过粘结或者焊接的方式设置于钢梁上翼缘上表面的所有边缘处，与所述钢梁上翼缘上表面之间形成开口空腔。Further, the limiting positioning device is arranged on all edges of the upper surface of the upper flange of the steel beam by bonding or welding, forming an open cavity with the upper surface of the upper flange of the steel beam.
优先的，所述限制定位装置优先采用高分子材料，也可采用与所述钢梁相同的材质，所述限制定位装置的高度为10mm～30mm。Preferably, the limiting positioning device is preferably made of polymer material, and may also be made of the same material as the steel beam, and the height of the limiting positioning device is 10 mm to 30 mm.
进一步，所述抗剪件通过焊接工艺设置于所述钢梁上翼缘上表面。Further, the shear member is arranged on the upper surface of the upper flange of the steel beam through a welding process.
优先的，所述抗剪件优先采用栓钉，也可以采用螺栓、开孔板、槽钢等形式。Preferably, the shear member preferably adopts studs, and may also adopt forms such as bolts, perforated plates, and channel steel.
进一步，所述上部纵向钢筋和所述下部纵向钢筋的材质分别与所述混凝土左板和所述混凝土右板的上部和下部纵向钢筋相同，可以提高接缝处的整体性。Further, the material of the upper longitudinal reinforcement and the lower longitudinal reinforcement is the same as that of the upper and lower longitudinal reinforcement of the concrete left slab and the concrete right slab respectively, which can improve the integrity of the joint.
进一步，所述灌浆材料优先采用环氧砂浆，也可以采用自密实混凝土。Further, the grouting material is preferably epoxy mortar, and self-compacting concrete may also be used.
进一步，在工厂预制时，与所述灌浆材料接触的所述混凝土左板和所述混凝土右板部分应采用止浆带。Further, during factory prefabrication, the parts of the left concrete slab and the right concrete slab that are in contact with the grouting material should use grout stop strips.
优先的，所述止浆带优先采用表面较细密的产品。Preferentially, the slurry stopper is preferably a product with a finer surface.
一种新型抗拉剪的钢-混凝土组合梁结构的制作工艺，所述制作工艺包括以下步骤：A manufacturing process of a novel tensile-shear steel-concrete composite beam structure, said manufacturing process comprising the following steps:
(1)工厂预制(1) Factory prefabrication
1.1)准备好制作预制板的混凝土材料、钢筋材料和止浆带；1.1) Prepare the concrete materials, reinforcement materials and grout stop strips for making prefabricated slabs;
1.2)根据图纸中混凝土板构造绑扎钢筋和制作模板，与灌浆材料接触的混凝土板部分应采用止浆带；1.2) According to the structure of the concrete slab in the drawing, bind the steel bars and make the formwork, and the part of the concrete slab that is in contact with the grouting material should use a grout stopper;
1.3)对接的两块混凝土板外伸的上部、下部钢筋成交错状；将混凝土板外伸的上部钢筋和下部进行锚固处理，上部钢筋通过90°冷弯工艺形成“L”形状，钢筋端向下，钢筋端部处制作钢筋螺纹；下部钢筋通过180°冷弯工艺后，钢筋端部成倒“U”字形，钢筋端头向下，冷弯工艺按相关标准施工；1.3) The upper and lower steel bars of the two butted concrete slabs are staggered; the upper steel bars and the lower part of the concrete slab are anchored, and the upper steel bars are formed into an "L" shape through a 90° cold bending process. Next, the steel bar thread is made at the end of the steel bar; after the lower steel bar passes through the 180° cold bending process, the end of the steel bar becomes an inverted "U" shape, the end of the steel bar is downward, and the cold bending process is carried out according to relevant standards;
1.4)浇筑混凝土、养护和拆模，撕下表面凹凸规则的止浆带，形成所有混凝土预制板；1.4) Pouring concrete, curing and removing formwork, tearing off the grout stop strip with regular uneven surface to form all concrete prefabricated slabs;
1.5)准备好制作钢梁胚料的钢板，对钢板进行裁剪，并通过焊接形成钢梁；1.5) Prepare steel plates for making steel girder blanks, cut the steel plates, and form steel girders by welding;
1.6)在钢梁上翼缘上开钢梁螺孔，钢梁螺孔与上部钢筋下垂位置对齐；1.6) Open the steel beam screw holes on the upper flange of the steel beam, and the steel beam screw holes are aligned with the drooping position of the upper steel bar;
1.7)对钢梁上表面进行除锈处理，在钢梁上翼缘上表面周边设置限制定位装置，限制定位装置和钢梁上翼缘上表面之间形成上开口的空腔；1.7) Carry out derusting treatment on the upper surface of the steel beam, set a limiting positioning device around the upper surface of the upper flange of the steel beam, and form an upper opening cavity between the limiting positioning device and the upper surface of the upper flange of the steel beam;
1.8)在钢梁的表面通过焊缝设置抗剪连接件；1.8) Set up shear connectors through welds on the surface of steel beams;
1.9)对接缝处钢梁表面和抗剪连接件表面进行喷砂处理，对其他部位进行防腐和防火处理；1.9) Sand blast the surface of the steel beam at the joint and the surface of the shear connector, and perform anti-corrosion and fire-proof treatment on other parts;
1.10)制作或购买螺杆、上固定装置、下固定装置和限制定位装置；1.10) Make or purchase screws, upper fixtures, lower fixtures and limit positioning devices;
(2)现场拼装(2) On-site assembly
2.1)将预制的钢梁和混凝土板运往现场堆放，待拼装；2.1) Transport the prefabricated steel beams and concrete slabs to the site for stacking, to be assembled;
2.2)将钢梁架设于工程现场的支座上；2.2) erect the steel beam on the support of the project site;
2.3)用扭矩扳手通过连接器将上部钢筋下垂段与螺杆上端连接在一起，需要达到钢筋连接器相关规范规定的扭矩，并将上部固定装置套在螺杆上，采用临时固定的方式，使上部固定装置粘结在螺杆上；2.3) Use a torque wrench to connect the drooping section of the upper steel bar with the upper end of the screw rod through the connector. It is necessary to reach the torque specified in the relevant specifications of the steel bar connector, and put the upper fixing device on the screw rod, and use a temporary fixing method to fix the upper part. The device is bonded to the screw;
2.4)通过吊装将预制混凝土板安装在钢梁上，预制混凝土板与限制定位装置直接接触，保证每根螺杆的下端穿过钢梁上的钢梁螺孔，并进行对其布置；2.4) Install the precast concrete slab on the steel beam by hoisting, the precast concrete slab is in direct contact with the limiting positioning device, ensure that the lower end of each screw rod passes through the steel beam screw hole on the steel beam, and arrange it;
2.5)将上部纵向钢筋和下部纵向钢筋和混凝土板外伸的钢筋通过板扎的方式连接成整体,；2.5) Connect the upper longitudinal reinforcement, the lower longitudinal reinforcement and the overhanging reinforcement of the concrete slab into a whole by means of plate binding;
2.6)待整体稳定后，拧好上部固定装置，保证上部固定装置与钢梁上翼缘上表面贴紧；2.6) After the overall stability, screw the upper fixing device to ensure that the upper fixing device is tightly attached to the upper surface of the upper flange of the steel beam;
2.7)向钢梁和预制板之间形成接缝处灌注调配好的灌浆材料；2.7) Pour the prepared grouting material into the joint formed between the steel beam and the prefabricated slab;
2.8)待凝固后，将下部固定装置穿过螺杆下部，并拧紧，并采用封胶材料密封，防止锈蚀。2.8) After solidification, pass the lower fixing device through the lower part of the screw and tighten it, and seal it with a sealing material to prevent corrosion.
本发明的有益效果主要表现在：The beneficial effects of the present invention are mainly manifested in:
(1)混凝土板外伸的上部钢筋采用冷弯工艺弯成90°向下，并采用连接器与螺杆连接成整体，将螺杆穿过钢梁上开设的孔洞，通过上固定装置和下固定装置连接于钢梁上，浇筑灌浆料凝固后，混凝土板和钢梁之间的连接更加稳固，当剪力、扭转、横向弯矩或者支座负弯矩作用于钢-混凝土组合梁上时，上部钢筋下弯段、连机器和螺杆上部可以起到抗剪作用，可以抵抗各工况在组合结构界面处产生的剪力；当各种工况使混凝土和钢梁之间产生拉力或扭矩等时，上部钢筋下弯段、连机器和螺杆可以起到抗拔或抗扭作用，是钢梁和混凝土板之间失踪保证紧密贴合的状态。(1) The upper steel bar protruding from the concrete slab is bent downward at 90° by cold bending process, and connected with the screw rod by a connector to form a whole. The screw rod passes through the hole opened on the steel beam, and passes through the upper fixing device and the lower fixing device Connected to the steel beam, after the pouring grout is solidified, the connection between the concrete slab and the steel beam is more stable. When the shear force, torsion, lateral bending moment or negative bending moment of the support acts on the steel-concrete composite beam, the upper The lower bending section of the steel bar, the connecting machine and the upper part of the screw can act as shear resistance, and can resist the shear force generated at the interface of the composite structure under various working conditions; when various working conditions cause tension or torque between the concrete and the steel beam, etc. , the lower bending section of the upper steel bar, the connecting machine and the screw can play the role of anti-pull or torsion resistance, which is the state where the missing between the steel beam and the concrete slab ensures a tight fit.
(2)结构通过抗剪件、螺杆和上部钢筋下弯部分以及环氧砂浆共同抗剪，大大提高了现有组合梁方案的抗剪承载力。(2) The structure resists shear through the shear parts, the screw rod, the lower bending part of the upper steel bar and the epoxy mortar, which greatly improves the shear bearing capacity of the existing composite beam scheme.
(3)预制混凝土板时，在位于接缝混凝土模板上设置具有凹凸状的止浆带，使接缝处的预制板表面规则凹凸状，配合环氧砂浆超强的抗压、抗剪能力、变形协调能力和抗剥离性能，使接缝处环氧砂浆和预制板之间形成有效的连接，可以防止新旧区块交接处在外荷载作用下出现开裂情况。(3) When prefabricating concrete slabs, a concave-convex grout stop belt is provided on the joint concrete formwork, so that the surface of the prefabricated slab at the joint is regular and concave-convex, and with the super compressive and shearing capabilities of epoxy mortar, Deformation coordination ability and anti-stripping performance enable an effective connection between epoxy mortar and prefabricated panels at the joints, which can prevent cracking at the junction of old and new blocks under external loads.
(4)钢梁上设置的限制定位装置和钢梁之间新城一个开口腔，预制板架设于限制定位装置之上，灌注环氧砂浆时，环氧砂浆可以填满该开孔腔，使钢梁和混凝土预制板之间的连接无间隙。一方面，可以起到防水的效果，防止钢梁上翼缘板上表面与预制板之间出现脱空的情况，避免钢梁上表面和抗剪连接件在潮湿的环境下发生锈蚀，提高钢-混凝土组合梁桥的耐久性；另一方面，钢梁和混凝土之间的这层环氧砂浆可以和抗剪连接件共同工作，为结构抵抗剪力，并且可以缓解抗剪连接件在工作时所受的疲劳损伤。(4) The limiting positioning device set on the steel beam and an opening in the new city between the steel beams. The prefabricated panel is erected on the limiting positioning device. When epoxy mortar is poured, the epoxy mortar can fill the opening cavity, so that the steel The connection between the beam and the precast concrete slab is gap-free. On the one hand, it can play a waterproof effect, prevent the gap between the upper surface of the steel beam flange plate and the prefabricated slab, avoid the corrosion of the upper surface of the steel beam and the shear connector in a humid environment, and improve the steel-concrete Durability of composite girder bridges; on the other hand, this layer of epoxy mortar between the steel beam and concrete can work together with the shear connectors to resist shear for the structure and relieve the shear connectors from being subjected to stress during work. of fatigue damage.
附图说明Description of drawings
图1为一种新型抗拉剪的钢-混凝土组合梁结构未装配的正面剖切示意图。Fig. 1 is a schematic cut-away front view of a new type of steel-concrete composite beam structure resisting tensile shear.
图2为一种新型抗拉剪的钢-混凝土组合梁结构未浇筑的正面剖切示意图。Fig. 2 is a schematic cut-away frontal view of a new type of steel-concrete composite beam structure resisting tensile shear.
图3为一种新型抗拉剪的钢-混凝土组合梁结构的A-A剖面图。Fig. 3 is an A-A sectional view of a new type of tensile shear steel-concrete composite beam structure.
图4为一种新型抗拉剪的钢-混凝土组合梁结构的爆炸示意图。Fig. 4 is a schematic exploded view of a new type of steel-concrete composite beam structure resistant to tensile shear.
其中，11为混凝土左板，111为左上部钢筋，112为左下部钢筋，12为混凝土右板，121为右上部钢筋，122为右上部钢筋，13为钢筋螺纹，2为钢梁，211为第一钢梁螺孔，212为第二钢梁螺孔，3为限制定位装置，4为螺杆，41为上固定装置，42为下固定装置，5位连接器，6为抗剪件，7为上部纵向钢筋，8为下部纵向钢筋，9为灌浆材料，10为止浆带。Among them, 11 is the concrete left plate, 111 is the upper left steel bar, 112 is the lower left steel bar, 12 is the concrete right plate, 121 is the upper right steel bar, 122 is the upper right steel bar, 13 is the steel bar thread, 2 is the steel beam, 211 is The first steel beam screw hole, 212 is the second steel beam screw hole, 3 is the limiting positioning device, 4 is the screw rod, 41 is the upper fixing device, 42 is the lower fixing device, 5-position connector, 6 is the shear member, 7 Denotes the upper longitudinal reinforcement, 8 the lower longitudinal reinforcement, 9 the grouting material, and 10 the grout stop.
具体实施方式Detailed ways
下面结合附图对本发明作进一步描述。The present invention will be further described below in conjunction with the accompanying drawings.
参照图1～图4，一种新型抗拉剪的钢-混凝土组合梁结构，包括混凝土左板11、混凝土右板12、钢梁2、限制定位装置3、螺杆4、上固定装置41、下固定装置42、连接器5、抗剪件6、上部纵向钢筋7、下部纵向钢8和灌浆材料9。抗剪件6通过焊接方式连接于钢梁2上翼缘上表面，限制定位装置3通过粘结或焊接连接于钢梁2上翼缘的边缘，与钢梁2上翼缘上表面形成开口空腔；混凝土左板11和混凝土右板12通过螺杆4、上固定装置41、及下固定装置42和连接器5连接于钢梁2上；混凝土左板11、混凝土右板12和设置有连接件6与限制定位装置3通过灌浆料材料9粘结成整体，形成新型抗拉剪的钢-混凝土组合梁结构。Referring to Figures 1 to 4, a new steel-concrete composite beam structure resistant to tensile shear includes a concrete left slab 11, a concrete right slab 12, a steel beam 2, a limiting positioning device 3, a screw 4, an upper fixing device 41, a lower Fixing device 42 , connector 5 , shear member 6 , upper longitudinal reinforcement 7 , lower longitudinal steel 8 and grouting material 9 . The shear member 6 is connected to the upper surface of the upper flange of the steel beam 2 by welding, and the limiting positioning device 3 is connected to the edge of the upper flange of the steel beam 2 by bonding or welding, forming an open space with the upper surface of the upper flange of the steel beam 2 Cavity; the concrete left plate 11 and the concrete right plate 12 are connected on the steel beam 2 through the screw rod 4, the upper fixing device 41, the lower fixing device 42 and the connector 5; the concrete left plate 11, the concrete right plate 12 and the connecting piece are provided 6 and the limiting positioning device 3 are bonded together through the grout material 9 to form a new steel-concrete composite beam structure resistant to tensile shear.
混凝土左板11包括混凝土和左上部钢筋111以及左下部钢筋112，混凝土板优先采用高强度混凝土。The left concrete slab 11 includes concrete, upper left steel bars 111 and lower left steel bars 112, and the concrete slab is preferably made of high-strength concrete.
左上部钢筋111和左下部钢筋112为混凝土左板11配筋中一部分上部横向钢筋和下部横向钢筋的外伸部分，上部钢筋包含钢筋和钢筋螺纹13；左上部钢筋111包括钢筋和钢筋螺纹13，左上部钢筋111通过90°冷弯工艺形成“L”形状，钢筋端向下，在钢筋端部处制作钢筋螺纹13，冷弯工艺按相关标准施工；左下部钢筋112通过180°冷弯工艺后，钢筋端部成倒“U”字形，钢筋端头向下，冷弯工艺按相关标准施工。The upper left reinforcing bar 111 and the lower left reinforcing bar 112 are the overhanging parts of a part of the upper transverse reinforcing bar and the lower transverse reinforcing bar in the reinforcement of the left concrete slab 11, and the upper reinforcing bar includes reinforcing bars and reinforcing bar threads 13; the left upper reinforcing bar 111 includes reinforcing bars and reinforcing bar threads 13, The upper left steel bar 111 forms an "L" shape through a 90° cold bending process, and the steel bar ends downward, and the steel bar thread 13 is made at the end of the steel bar, and the cold bending process is constructed according to relevant standards; , The end of the steel bar is in an inverted "U" shape, the end of the steel bar is downward, and the cold bending process is constructed according to relevant standards.
混凝土右板12包括混凝土和右上部钢筋121以及右下部钢筋122，混凝土板优先采用高强度混凝土；左上部钢筋121和左下部钢筋122为混凝土右板12配筋中一部分上部横向钢筋和下部横向钢筋的外伸部分，上部钢筋包含钢筋和钢筋螺纹13；右上部钢筋121包括钢筋和钢筋螺纹，右上部钢筋121通过90°冷弯工艺形成“L”形状，钢筋端向下，在钢筋端部处制作钢筋螺纹，冷弯工艺按相关标准施工；右下部钢筋122通过180°冷弯工艺后，钢筋端部成倒“U”字形，钢筋端头向下，冷弯工艺按相关标准施工。The concrete right slab 12 includes concrete, the upper right reinforcement bar 121 and the lower right reinforcement bar 122. The concrete slab is preferably made of high-strength concrete; The overhanging part, the upper reinforcing bar contains reinforcing bar and reinforcing bar thread 13; the upper right reinforcing bar 121 comprises reinforcing bar and reinforcing bar thread, and the right upper reinforcing bar 121 forms " L " shape through 90 ° cold bending process, and reinforcing bar end is downward, and at the end of reinforcing bar To make steel bar threads, the cold bending process is carried out according to relevant standards; after the lower right steel bar 122 passes through the 180° cold bending process, the end of the steel bar becomes an inverted "U" shape, and the end of the steel bar is downward, and the cold bending process is carried out according to relevant standards.
钢梁2上开设钢梁螺孔，钢梁采用耐腐蚀、耐高温的合金钢材，钢梁螺，包括第一钢梁螺孔211和第二钢梁螺孔212，第一钢梁螺孔211与左上部钢筋111下垂段位置对齐，第二钢梁螺孔212与右上部钢筋121下垂段位置对齐，第一钢梁螺孔211和第二钢梁螺孔212直径比螺杆直径大2mm；限制定位装置3通过粘结或者焊接的方式设置于钢梁2上翼缘上表面的所有边缘处，与钢梁2上翼缘上表面之间形成开口空腔；限制定位装置3采用与钢梁3相同的材质，限制定位装置3的高度为30mm。Steel girder screw holes are provided on the steel girder 2. The steel girder is made of corrosion-resistant and high-temperature-resistant alloy steel. Align with the position of the drooping section of the upper left steel bar 111, the second steel beam screw hole 212 is aligned with the position of the drooping section of the upper right steel bar 121, the diameter of the first steel beam screw hole 211 and the second steel beam screw hole 212 is 2mm larger than the diameter of the screw rod; limit The positioning device 3 is arranged on all edges of the upper surface of the upper flange of the steel beam 2 by bonding or welding, forming an open cavity with the upper surface of the upper flange of the steel beam 2; With the same material, the height of the limiting positioning device 3 is 30 mm.
连接器5用于连接左上部钢筋111或右上部钢筋121和螺杆4；连接器3采用高强度材料，其内孔螺纹与左上部钢筋111或右上部钢筋121下端部的钢筋螺纹13匹配。The connector 5 is used to connect the upper left reinforcing bar 111 or the upper right reinforcing bar 121 and the screw rod 4; the connector 3 adopts high-strength material, and its inner hole thread matches the reinforcing bar thread 13 at the lower end of the upper left reinforcing bar 111 or the upper right reinforcing bar 121.
螺杆4和上固定装置41以及下固定装置42组成连接装置，通过连接器5将左上部钢筋111或右上部钢筋于钢梁121相连接，螺杆4上端和下端均有螺纹，螺纹相同，螺纹与连接器5内控螺纹匹配，螺杆4采用高强度材料；上固定装置41和下固定装置42均包含一个垫片和一个螺母，螺母与螺杆上的螺纹匹配，均采用高强度材料制成.The screw rod 4, the upper fixing device 41 and the lower fixing device 42 form a connecting device, and the upper left reinforcing bar 111 or the upper right reinforcing bar are connected to the steel beam 121 through the connector 5. The upper end and the lower end of the screw rod 4 are threaded, and the threads are the same. The internal control thread of the connector 5 is matched, and the screw rod 4 is made of high-strength material; the upper fixing device 41 and the lower fixing device 42 both include a washer and a nut, and the nut matches the thread on the screw rod, and is made of high-strength material.
抗剪件6通过焊接工艺设置于钢梁2上翼缘上表面；抗剪件6优先采用栓钉形式；上部纵向钢筋7和下部纵向钢筋8的材质分别与与混凝土左板11和混凝土右板12的上部和下部纵向钢筋相同，灌浆材料9采用环氧砂浆，在工厂预制时，与灌浆材料9接触的混凝土左板11和混凝土右板12部分应采用止浆带10。The shear member 6 is installed on the upper surface of the upper flange of the steel beam 2 through welding process; the shear member 6 is preferentially in the form of studs; the materials of the upper longitudinal reinforcement 7 and the lower longitudinal reinforcement 8 are the same as those of the concrete left slab 11 and the concrete right slab The upper and lower longitudinal steel bars of 12 are the same, and the grouting material 9 is epoxy mortar. When prefabricated in the factory, the concrete left plate 11 and the concrete right plate 12 that are in contact with the grouting material 9 should use a grout stopper 10.
一种新型抗拉剪的钢-混凝土组合梁结构的制作工艺，包括以下步骤：A manufacturing process of a novel tension-shear resistant steel-concrete composite beam structure comprises the following steps:
(1)工厂预制(1) Factory prefabrication
1.1)准备好制作预制板的混凝土材料、钢筋材料、止浆带；1.1) Prepare the concrete material, steel bar material and grout stop belt for making prefabricated slabs;
1.2)根据图纸中混凝土板构造绑扎钢筋和制作模板，与灌浆材料接触的混凝土板部分应采用止浆带；1.2) According to the structure of the concrete slab in the drawing, bind the steel bars and make the formwork, and the part of the concrete slab that is in contact with the grouting material should use a grout stopper;
1.3)对接的两块混凝土板外伸的上部、下部钢筋成交错状；将混凝土板外伸的上部钢筋和下部进行锚固处理，上部钢筋通过90°冷弯工艺形成“L”形状，钢筋端向下，钢筋端部处制作钢筋螺纹；下部钢筋通过180°冷弯工艺后，钢筋端部成倒“U”字形，钢筋端头向下，冷弯工艺按相关标准施工；1.3) The upper and lower steel bars of the two butted concrete slabs are staggered; the upper steel bars and the lower part of the concrete slab are anchored, and the upper steel bars are formed into an "L" shape through a 90° cold bending process. Next, the steel bar thread is made at the end of the steel bar; after the lower steel bar passes through the 180° cold bending process, the end of the steel bar becomes an inverted "U" shape, the end of the steel bar is downward, and the cold bending process is carried out according to relevant standards;
1.4)浇筑混凝土、养护和拆模，撕下表面凹凸规则的止浆带，形成所有混凝土预制板；1.4) Pouring concrete, curing and removing formwork, tearing off the grout stop strip with regular uneven surface to form all concrete prefabricated slabs;
1.5)准备好制作钢梁胚料的钢板，对钢板进行裁剪，并通过焊接形成“工”字或“H”或“T”或其它形状的钢梁；1.5) Prepare steel plates for making steel girder blanks, cut the steel plates, and form "I" or "H" or "T" or other shaped steel girders by welding;
1.6)在钢梁上翼缘上开钢梁螺孔，钢梁螺孔与上部钢筋下垂位置对齐；1.6) Open the steel beam screw holes on the upper flange of the steel beam, and the steel beam screw holes are aligned with the drooping position of the upper steel bar;
1.7)对钢梁上表面进行除锈处理，在钢梁上翼缘上表面周边设置限制定位装置，限制定位装置和钢梁上翼缘上表面之间形成上开口的空腔；1.7) Carry out derusting treatment on the upper surface of the steel beam, set a limiting positioning device around the upper surface of the upper flange of the steel beam, and form an upper opening cavity between the limiting positioning device and the upper surface of the upper flange of the steel beam;
1.8)在钢梁的表面通过焊缝设置抗剪连接件；1.8) Set up shear connectors through welds on the surface of steel beams;
1.9)对接缝处钢梁表面和抗剪连接件表面进行喷砂处理，对其他部位进行防腐和防火处理；1.9) Sand blast the surface of the steel beam at the joint and the surface of the shear connector, and perform anti-corrosion and fire-proof treatment on other parts;
1.10)制作或购买螺杆、上固定装置、下固定装置和限制定位装置；1.10) Make or purchase screws, upper fixtures, lower fixtures and limit positioning devices;
(2)现场拼装(2) On-site assembly
2.1)将预制的钢梁和混凝土板运往现场，合理堆放，待拼装；2.1) Transport the prefabricated steel beams and concrete slabs to the site, stack them reasonably, and wait for assembly;
2.2)将钢梁架设于工程现场的支座上；2.2) erect the steel beam on the support of the project site;
2.3)用扭矩扳手通过连接器将上部钢筋下垂段与螺杆上端连接在一起，需要达到钢筋连接器相关规范规定的扭矩，并将上部固定装置套在螺杆上，采用临时固定的方式，使上部固定装置粘结在螺杆上；2.3) Use a torque wrench to connect the drooping section of the upper steel bar with the upper end of the screw rod through the connector. It is necessary to reach the torque specified in the relevant specifications of the steel bar connector, and put the upper fixing device on the screw rod, and use a temporary fixing method to fix the upper part. The device is bonded to the screw;
2.4)通过吊装将预制混凝土板安装在钢梁上，预制混凝土板与限制定位装置直接接触，保证每根螺杆的下端穿过钢梁上的钢梁螺孔，并进行对其布置；2.4) Install the precast concrete slab on the steel beam by hoisting, the precast concrete slab is in direct contact with the limiting positioning device, ensure that the lower end of each screw rod passes through the steel beam screw hole on the steel beam, and arrange it;
2.5)将上部纵向钢筋和下部纵向钢筋和混凝土板外伸的钢筋通过板扎的方式连接成整体,；2.5) Connect the upper longitudinal reinforcement, the lower longitudinal reinforcement and the overhanging reinforcement of the concrete slab into a whole by means of plate binding;
2.6)待整体稳定后，拧好上部固定装置，保证上部固定装置与钢梁上翼缘上表面贴紧；2.6) After the overall stability, screw the upper fixing device to ensure that the upper fixing device is tightly attached to the upper surface of the upper flange of the steel beam;
2.7)向钢梁和预制板之间形成接缝处灌注调配好的灌浆材料(环氧砂浆)；2.7) Pour prepared grouting material (epoxy mortar) into the joint formed between the steel beam and the prefabricated slab;
2.8)待凝固后，将下部固定装置穿过螺杆下部，并拧紧，并采用封胶材料密封，防止锈蚀。2.8) After solidification, pass the lower fixing device through the lower part of the screw and tighten it, and seal it with a sealing material to prevent corrosion.
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