技术领域technical field
本实用新型涉及土木工程技术领域，尤其是一种基于肋板式桥面的钢-超高性能混凝土组合梁结构。The utility model relates to the technical field of civil engineering, in particular to a steel-ultra high-performance concrete composite beam structure based on a ribbed bridge deck.
背景技术Background technique
组合梁结构因其材料利用合理、经济、施工便捷等优点，在路桥及建筑领域得以广泛应用。然而，组合结构连续梁负弯区的混凝土受拉易开裂，导致组合梁耐久性差。为解决此问题，目前在设计上采用两种方法处理：一种方法是允许结构中的混凝土板开裂，但限制其裂缝宽度，通常是增加结构的配筋率使得混凝土板在正常使用情况下满足裂缝宽度的限值，即强配筋法；另一种方法是不允许结构中的混凝土板开裂或允许其少开裂，通常采用施加预压应力的方法减少或避免混凝土板出现拉应力，如预加荷载法、支座位移法、一般预应力筋法、后结合桥面板预应力筋法等。强配筋法单独使用时仅适用于中小跨径桥的施工，因其长期带裂缝工作，对耐久性存在不利影响。施加预压应力的方法不可避免地也对剪力连接件施加了附加应力，不但增大了钢梁的负担，也消弱了对混凝土板施加的预压应力的效果；设置后浇带虽避免了对剪力连接件的附加应力，但后浇带和预制混凝土连接界面粘结强度差，且组合梁在不同材质的连接界面处又存在受力的薄弱环节或腐蚀通道的问题。Composite beam structures are widely used in the fields of roads, bridges and construction due to their advantages of reasonable material utilization, economy, and convenient construction. However, the concrete in the negative bending zone of composite continuous beams is prone to cracking under tension, resulting in poor durability of composite beams. In order to solve this problem, two methods are currently used in the design: one method is to allow the concrete slab in the structure to crack, but limit the width of the crack, usually to increase the reinforcement ratio of the structure so that the concrete slab meets the requirements under normal use. The limit of the crack width, that is, the strong reinforcement method; another method is not to allow the concrete slab in the structure to crack or allow it to crack less. Usually, the method of applying precompression stress is used to reduce or avoid the tensile stress of the concrete slab, such as prestressing. Loading method, support displacement method, general prestressed tendon method, post-combined bridge deck prestressed tendon method, etc. When the strong reinforcement method is used alone, it is only suitable for the construction of small and medium-span bridges, because of its long-term work with cracks, it has an adverse effect on durability. The method of applying precompressive stress inevitably also imposes additional stress on the shear connectors, which not only increases the burden on the steel beam, but also weakens the effect of precompressive stress on the concrete slab; However, the bond strength between the post-cast belt and the precast concrete connection interface is poor, and the composite beam has weak links or corrosion channels at the connection interface of different materials.
超高性能混凝土（UHPC）是一种高强度、高模量、高延性的超高性能纤维增强水泥复合材料，特别对于超高性能混凝土中的活性粉末混凝土（RPC），是众多超高性能混凝土中应用最多也是最具发展前景的一种新型建筑材料。通常抗压强度不低于100MPa、轴拉强度不低于8MPa，可通过在UHPC内布置钢筋网进一步增强结构的抗拉能力。UHPC还具有相当高的致密性，抗渗系数很高，水分基本不易透过UHPC进入粘结层。如果用UHPC代替普通混凝土结构，通常可以采用较小的板厚，降低结构自重，从而降低工程造价。Ultra-high performance concrete (UHPC) is a high-strength, high-modulus, high-ductility ultra-high-performance fiber-reinforced cement composite material, especially for reactive powder concrete (RPC) in ultra-high-performance concrete. It is the most widely used and most promising new type of building material. Usually the compressive strength is not less than 100MPa, and the axial tensile strength is not less than 8MPa. The tensile strength of the structure can be further enhanced by arranging steel mesh in UHPC. UHPC also has a fairly high density and a high impermeability coefficient, and it is basically difficult for water to penetrate UHPC into the bonding layer. If UHPC is used to replace ordinary concrete structures, a smaller plate thickness can usually be used to reduce the self-weight of the structure, thereby reducing the project cost.
实用新型内容Utility model content
鉴于现有技术的不足，本实用新型的目的在于提供一种基于肋板式桥面的钢-超高性能混凝土组合梁结构，该结构受力合理、强度高，可大幅度降低结构自重，有效避免组合连续梁负弯矩区病害的产生，充分发挥超高性能混凝土抗拉、抗压强度和高耐久性。In view of the deficiencies in the prior art, the purpose of this utility model is to provide a steel-ultra-high-performance concrete composite beam structure based on a ribbed deck. The generation of the negative moment zone disease of composite continuous beams can give full play to the tensile strength, compressive strength and high durability of ultra-high performance concrete.
为了实现上述目的，本实用新型的技术方案是：一种基于肋板式桥面的钢-超高性能混凝土组合梁结构，包括钢梁，所述钢梁上放置有超高性能混凝土桥面板，所述超高性能混凝土桥面板通过剪力连接件与钢梁固定在一起，所述超高性能混凝土桥面板内设置有由钢筋纵横交错组成的钢筋网，所述超高性能混凝土桥面板的横截面和纵截面中的至少一者为肋板结构，以形成肋板式超高性能混凝土桥面板。In order to achieve the above object, the technical solution of the present utility model is: a steel-ultra-high performance concrete composite beam structure based on a ribbed bridge deck, including a steel beam, and an ultra-high performance concrete bridge deck is placed on the steel beam. The ultra-high-performance concrete bridge deck is fixed together with the steel beams through shear connectors, and the ultra-high-performance concrete bridge deck is provided with a steel mesh composed of steel bars criss-crossing, and the cross-section of the ultra-high-performance concrete bridge deck is and at least one of the longitudinal sections is a rib structure to form a rib-type ultra-high performance concrete bridge deck.
优选的，所述超高性能混凝土桥面板是由超高性能混凝土浇筑而成，所述超高性能混凝土为活性粉末混凝土、超高性能纤维增强混凝土或注浆纤维混凝土。Preferably, the ultra-high-performance concrete bridge deck is cast from ultra-high-performance concrete, and the ultra-high-performance concrete is reactive powder concrete, ultra-high-performance fiber reinforced concrete or grouted fiber concrete.
优选的，所述超高性能混凝土桥面板下缘横桥向按预定的间距设置有纵肋，所述纵肋的截面外形为U形、梯形或矩形。Preferably, the lower edge of the ultra-high-performance concrete bridge deck is provided with longitudinal ribs at predetermined intervals in the cross-bridge direction, and the cross-sectional shape of the longitudinal ribs is U-shaped, trapezoidal or rectangular.
优选的，所述超高性能混凝土桥面板在纵肋区域设置有预应力钢筋。Preferably, the ultra-high performance concrete bridge deck is provided with prestressed steel bars in the region of the longitudinal ribs.
优选的，所述超高性能混凝土桥面板下缘顺桥向按预定的间距设置有横肋，所述横肋的截面外形为U形、梯形或矩形。Preferably, the lower edge of the ultra-high-performance concrete bridge deck is provided with transverse ribs at predetermined intervals along the bridge direction, and the cross-sectional shape of the transverse ribs is U-shaped, trapezoidal or rectangular.
优选的，所述超高性能混凝土桥面板在横肋区域设置有预应力钢筋。Preferably, the ultra-high performance concrete bridge deck is provided with prestressed steel bars in the region of the transverse ribs.
优选的，所述超高性能混凝土桥面板内设置有用于穿设预应力钢筋的预应力孔道。Preferably, the ultra-high performance concrete bridge deck is provided with prestressed tunnels for passing prestressed steel bars.
优选的，所述剪力连接件为焊钉连接件、PBL剪力键或槽钢剪力键。Preferably, the shear connector is a stud connector, a PBL shear key or a channel steel shear key.
优选的，所述钢梁为工字形钢梁或槽形钢梁，所述槽形钢梁为单箱或多箱结构，所述槽形钢梁的箱内设有单室或多室。Preferably, the steel beam is an I-shaped steel beam or a channel-shaped steel beam, the channel-shaped steel beam is a single-box or multi-box structure, and the box of the channel-shaped steel beam is provided with a single room or multiple rooms.
优选的，所述超高性能混凝土桥面板的厚度为5~12cm。Preferably, the thickness of the ultra-high performance concrete bridge deck is 5-12cm.
与现有技术相比，本实用新型具有以下有益效果：该基于肋板式桥面的钢-超高性能混凝土组合梁结构受力合理、强度高，可大幅度降低结构自重，有效避免组合连续梁负弯矩区病害的产生，充分发挥超高性能混凝土抗拉、抗压强度和高耐久性，具有建筑高度小、刚度大、自重轻、耐久性好、抗裂性能好、抗疲劳性能好等优点，有着重大的实用价值和良好的经济效益。Compared with the prior art, the utility model has the following beneficial effects: the steel-ultra-high-performance concrete composite beam structure based on the ribbed bridge deck has reasonable stress and high strength, can greatly reduce the structure's own weight, and effectively avoids the combination of continuous beams The generation of negative bending moment area diseases, give full play to the tensile strength, compressive strength and high durability of ultra-high performance concrete, with small building height, high rigidity, light weight, good durability, good crack resistance, good fatigue resistance, etc. The utility model has great practical value and good economic benefits.
附图说明Description of drawings
图1为本实用新型实施例一的结构示意图。Fig. 1 is a structural schematic diagram of Embodiment 1 of the utility model.
图2为图1中A-A处的截面图。Fig. 2 is a cross-sectional view at A-A in Fig. 1 .
图3为本实用新型实施例二的结构示意图。Fig. 3 is a schematic structural diagram of Embodiment 2 of the utility model.
图中标记：1-钢梁，1-1-工字形钢梁，1-2-槽形钢梁，2-超高性能混凝土桥面板，3-剪力连接件，4-纵肋，5-横肋，6-预应力孔道，7-预应力钢筋。Marks in the figure: 1-steel girder, 1-1-I-shaped steel girder, 1-2-channel steel girder, 2-ultra-high performance concrete bridge deck, 3-shear connector, 4-longitudinal rib, 5- Transverse ribs, 6-prestressed channels, 7-prestressed steel bars.
具体实施方式Detailed ways
为让本实用新型的上述特征和优点能更明显易懂，下文特举实施例，并配合附图，作详细说明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific examples are given together with the accompanying drawings and described in detail as follows.
如图1~3所示，一种基于肋板式桥面的钢-超高性能混凝土组合梁结构，包括钢梁1，所述钢梁1上放置有超高性能混凝土桥面板2，所述超高性能混凝土桥面板2通过剪力连接件3与钢梁1固定在一起，所述超高性能混凝土桥面板2内设置有由钢筋纵横交错组成的钢筋网，所述超高性能混凝土桥面板2的横截面和纵截面中的至少一者为肋板结构，以形成肋板式超高性能混凝土桥面板2。As shown in Figures 1 to 3, a steel-ultra-high performance concrete composite beam structure based on a ribbed bridge deck includes a steel girder 1, and an ultra-high performance concrete bridge deck 2 is placed on the steel beam 1. The high-performance concrete bridge deck 2 is fixed together with the steel beam 1 through the shear connector 3. The ultra-high-performance concrete bridge deck 2 is provided with a reinforcement mesh composed of steel bars criss-crossing. The ultra-high-performance concrete bridge deck 2 At least one of the cross-section and longitudinal section is a rib structure, so as to form a rib-type ultra-high performance concrete bridge deck 2.
其中，所述超高性能混凝土桥面板2是由超高性能混凝土浇筑而成，所述超高性能混凝土是指组分中含钢纤维、抗压强度不低于100MPa、轴拉强度不低于8MPa的水泥混凝土，例如活性粉末混凝土、超高性能纤维增强混凝土、注浆纤维混凝土等。Wherein, the ultra-high-performance concrete bridge deck 2 is poured from ultra-high-performance concrete, and the ultra-high-performance concrete means that the components contain steel fibers, the compressive strength is not less than 100MPa, and the axial tensile strength is not less than 8MPa cement concrete, such as active powder concrete, ultra-high performance fiber reinforced concrete, grouted fiber concrete, etc.
在本实用新型实施例一中，如图1~2所示，所述超高性能混凝土桥面板2下缘横桥向按预定的间距设置有纵肋4，所述超高性能混凝土桥面板2下缘顺桥向按预定的间距设置有横肋5，所述纵肋4和横肋5的截面外形均为U形，当然也可以为梯形或矩形等。In Embodiment 1 of the present utility model, as shown in Figures 1 to 2, longitudinal ribs 4 are arranged on the lower edge of the ultra-high performance concrete bridge deck 2 at predetermined intervals in the transverse bridge direction, and the ultra-high performance concrete bridge deck 2 The lower edge is provided with transverse ribs 5 at predetermined intervals along the bridge direction. The cross-sectional shapes of the longitudinal ribs 4 and the transverse ribs 5 are both U-shaped, and of course they can also be trapezoidal or rectangular.
在本实用新型实施例一中，所述剪力连接件3为焊钉连接件，当然也可以为PBL剪力键或槽钢剪力键等。所述钢梁1可以是工字形钢梁1-1，也可以使槽形钢梁1-2；所述槽形钢梁1-2可以是单箱或多箱结构，箱内可以设有单室或多室。所述超高性能混凝土桥面板2比较薄，其厚度为5~12cm。In Embodiment 1 of the present utility model, the shear connector 3 is a stud connector, of course, it can also be a PBL shear key or a channel steel shear key. The steel beam 1 can be an I-shaped steel beam 1-1, or a channel-shaped steel beam 1-2; the channel-shaped steel beam 1-2 can be a single box or a multi-box structure, and a single room or multiple rooms. The ultra-high performance concrete bridge deck 2 is relatively thin, with a thickness of 5-12 cm.
在本实用新型实施例二中，如图3所示，实施例二与实施一的主要区别在于：所述超高性能混凝土桥面板2在纵肋区域和横肋区域设置有预应力孔道6，所述预应力孔道6内穿设有预应力钢筋7。In the second embodiment of the utility model, as shown in Figure 3, the main difference between the second embodiment and the first embodiment is that the ultra-high performance concrete bridge deck 2 is provided with prestressed tunnels 6 in the longitudinal rib area and the transverse rib area, Prestressed steel bars 7 are pierced in the prestressed tunnel 6 .
特别需要说明的是，所述超高性能混凝土桥面板2也可以是仅横截面或仅纵截面为肋板结构，还可以是仅纵肋区域或仅横肋区域设置预应力钢筋7。In particular, it should be noted that the ultra-high performance concrete bridge deck 2 may also have a rib plate structure only in the cross section or only in the longitudinal section, and may also be provided with prestressed steel bars 7 only in the longitudinal rib area or only in the transverse rib area.
本实用新型不局限于上述的最佳实施方式，任何人在本实用新型的启示下都可以得出其他各种形式的基于肋板式桥面的钢-超高性能混凝土组合梁结构。凡依本实用新型申请专利范围所做的均等变化与修饰，皆应属本实用新型的涵盖范围。The utility model is not limited to the above-mentioned best implementation mode, anyone can draw other various forms of steel-ultra-high-performance concrete composite beam structures based on ribbed bridge decks under the inspiration of the utility model. All equivalent changes and modifications made according to the patent scope of the utility model should belong to the scope of the utility model.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345157.8UCN204703055U (en) | 2015-05-26 | 2015-05-26 | Based on the steel-ultra-high performance concrete combined beam structure of fin-plate type bridge floor |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345157.8UCN204703055U (en) | 2015-05-26 | 2015-05-26 | Based on the steel-ultra-high performance concrete combined beam structure of fin-plate type bridge floor |
| Publication Number | Publication Date |
|---|---|
| CN204703055Utrue CN204703055U (en) | 2015-10-14 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520345157.8UExpired - Fee RelatedCN204703055U (en) | 2015-05-26 | 2015-05-26 | Based on the steel-ultra-high performance concrete combined beam structure of fin-plate type bridge floor |
| Country | Link |
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| CN (1) | CN204703055U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831617A (en)* | 2015-05-26 | 2015-08-12 | 福州大学 | Steel-super high performance concrete composite beam based on ribbed plate type bridge deck and construction method |
| CN105839510A (en)* | 2016-05-23 | 2016-08-10 | 西安公路研究院 | Steel-ultra-high-performance concrete combined continuous beam bridge structure and construction method thereof |
| CN112982161A (en)* | 2021-02-09 | 2021-06-18 | 中铁大桥局集团有限公司 | Steel-concrete combined bridge deck structure and bridge |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831617A (en)* | 2015-05-26 | 2015-08-12 | 福州大学 | Steel-super high performance concrete composite beam based on ribbed plate type bridge deck and construction method |
| CN105839510A (en)* | 2016-05-23 | 2016-08-10 | 西安公路研究院 | Steel-ultra-high-performance concrete combined continuous beam bridge structure and construction method thereof |
| CN112982161A (en)* | 2021-02-09 | 2021-06-18 | 中铁大桥局集团有限公司 | Steel-concrete combined bridge deck structure and bridge |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20151014 Termination date:20210526 |