CN204174544U - A kind of bridge strengthening structure based on FRP material - Google Patents

A kind of bridge strengthening structure based on FRP material Download PDF

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CN204174544U
CN204174544U CN201420637574.5U CN201420637574U CN204174544U CN 204174544 U CN204174544 U CN 204174544U CN 201420637574 U CN201420637574 U CN 201420637574U CN 204174544 U CN204174544 U CN 204174544U
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frp
bridge
groove
panel
structure based
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郑愚
杨健彬
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Dongguan University of Technology
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Abstract

The utility model provides a kind of bridge strengthening structure, its offering groove across set direction and being embedded with FRP muscle at bridge panel, the FRP sheet of strip is adhesive with in the longitudinal direction (with across the crossing direction of set direction) of bridge panel, ruggedized construction of the present utility model adopts twocouese reinforcing mode, matching panel structure is two-way by curved or the shear behavior, improves consolidation effect.In addition, adopt FRP muscle as girth member at bridge panel across set direction, FRP muscle can be fixed with adjacent structure (brace summer) easily, be conducive to the stability and the height that improve ruggedized construction, and the FRP sheet of strip is adopted at horizontal direction, then can avoid fluting demand, avoid the problem of transversal slotting.

Description

一种基于FRP材料的桥梁加固结构A bridge reinforcement structure based on FRP material

技术领域 technical field

本实用新型涉及桥梁加固技术领域,特别涉及一种基于FRP材料的桥梁加固结构。 The utility model relates to the technical field of bridge reinforcement, in particular to a bridge reinforcement structure based on FRP materials.

背景技术 Background technique

在桥梁工程建设中,无论是混凝土结构、钢结构还是钢—混凝土组合结构,桥梁面板通常为钢筋混凝土板结构。在过去20年中,这些桥梁结构体系都暴露出一些问题,最为严重的是钢筋或钢材的腐蚀而导致的结构过早退化或功能不足。桥梁面板由于保护层厚度较小、除冰盐直接作用于其表面和因长期承受交通荷载容易造成开裂等原因,钢筋锈蚀问题尤为严重。因此对结构功能不足的桥梁面板需要进行结构加固补强。 In bridge engineering construction, whether it is concrete structure, steel structure or steel-concrete composite structure, the bridge deck is usually a reinforced concrete slab structure. Over the past 20 years, the structural systems of these bridges have been exposed to a number of problems, the most serious being corrosion of reinforcement or steel, resulting in premature structural degradation or inadequate function. Due to the small thickness of the protective layer, the direct action of deicing salt on the surface of the bridge deck, and the fact that it is prone to cracking due to long-term traffic loads, the corrosion of steel bars is particularly serious. Therefore, structural reinforcement is required for bridge panels with insufficient structural functions.

近年来,FRP(Fiber Reinforced Plastics ,纤维增强复合塑料)材料由于具有耐腐、轻质、高强、施工便捷等特点已经被广泛用于混凝土结构及其他结构加固领域。目前,对FRP加固钢筋混凝土结构的研究主要集中在外贴FRP片材的加固技术,各国也相继推出了相应的规范。在FRP加固混凝土结构中,FRP-混凝土粘结界面是一个薄弱环节,界面粘结强度往往决定了FRP的有效应力(结构达到极限承载力时FRP所达到的应力),从而决定FRP加固的效率和经济性。通过对以往的FRP外贴加固混凝土桥面板工程情况的分析,该加固技术在补强受损桥面结构中存在以下问题: In recent years, FRP (Fiber Reinforced Plastics, fiber reinforced composite plastics) materials have been widely used in concrete structures and other structural reinforcement fields due to their characteristics of corrosion resistance, light weight, high strength, and convenient construction. At present, the research on FRP-strengthened reinforced concrete structures mainly focuses on the reinforcement technology of FRP sheets, and various countries have also introduced corresponding specifications one after another. In the FRP reinforced concrete structure, the FRP-concrete bond interface is a weak link, and the interface bond strength often determines the effective stress of FRP (the stress achieved by FRP when the structure reaches the ultimate bearing capacity), thus determining the efficiency and effectiveness of FRP reinforcement. economy. Through the analysis of the previous FRP externally reinforced concrete bridge deck engineering, the reinforcement technology has the following problems in reinforcing the damaged bridge deck structure:

(1)随着日益繁重的交通运输荷载,钢筋混凝土桥面板的损伤面积较大,传统的FRP外贴加固方式导致了较高的施工和材料费用,制约了该具有较高耐久性能材料的推广应用; (1) With the increasingly heavy traffic load, the damage area of the reinforced concrete bridge deck is larger, and the traditional FRP external reinforcement method leads to higher construction and material costs, which restricts the promotion of this material with higher durability application;

(2)外贴FRP片材加固技术在桥面应用时,容易受到磨损和撞击等意外荷载,导致了加固部位的二次受损,因而二次加固频发; (2) When the external FRP sheet reinforcement technology is applied to the bridge deck, it is vulnerable to accidental loads such as abrasion and impact, resulting in secondary damage to the reinforcement part, so secondary reinforcement occurs frequently;

(3)外贴FRP片材不易于与相邻构件锚固,难以提高加固的稳定性和刚度。 (3) The external FRP sheet is not easy to anchor with adjacent components, and it is difficult to improve the stability and rigidity of reinforcement.

(4)如果采用嵌入式加固对受损面板进行加固时,由于需要开槽并不适用于进行面板结构纵向(与跨度方向垂直的方向)加固; (4) If embedded reinforcement is used to reinforce the damaged panel, it is not suitable for longitudinal (perpendicular to the span direction) reinforcement of the panel structure due to the need for slotting;

(5)由于面板结构在承受局部荷载时(如轮胎荷载),面板结构通常为双向受弯或者受剪,目前的加固方式都是单方向的加固,难以满足需求。 (5) When the panel structure is subjected to local loads (such as tire loads), the panel structure is usually subjected to bidirectional bending or shearing. The current reinforcement methods are all unidirectional reinforcement, which is difficult to meet the demand.

发明内容 Contents of the invention

本实用新型的目的在于避免上述现有技术中的不足之处而提供一种能够匹配桥梁双向受弯或者受剪的特点,从而改善加固效果的桥梁加固结构。 The purpose of the utility model is to avoid the disadvantages of the above-mentioned prior art and provide a bridge reinforcement structure that can match the bidirectional bending or shearing characteristics of the bridge, thereby improving the reinforcement effect.

本实用新型的目的通过以下技术方案实现: The purpose of this utility model is achieved through the following technical solutions:

提供了一种基于FRP材料的桥梁加固结构,包括支撑梁和跨设于支撑梁之间的待加固的桥梁面板,所述桥梁面板的底面沿桥梁面板的跨设方向开设有凹槽,所述凹槽中嵌设有FRP筋,所述桥梁面板的底面沿与所述凹槽相交的方向黏贴有条状的FRP片。 Provided is a bridge reinforcement structure based on FRP materials, including support beams and bridge panels to be reinforced spanning between the support beams, the bottom surface of the bridge panels is provided with grooves along the spanning direction of the bridge panels, the FRP tendons are embedded in the groove, and a strip-shaped FRP sheet is pasted on the bottom surface of the bridge panel along the direction intersecting with the groove.

优选的,所述FRP片与所述凹槽垂直设置。 Preferably, the FRP sheet is arranged vertically to the groove.

优选的,所述FRP筋的端部锚固于所述支撑梁。 Preferably, the ends of the FRP tendons are anchored to the support beams.

优选的,所述凹槽中还填充有固定胶以使所述FRP筋固定于凹槽中。 Preferably, the groove is also filled with fixing glue to fix the FRP bars in the groove.

优选的,所述凹槽的深度和宽度均为所述FRP筋的直径的1.5倍。 Preferably, the depth and width of the groove are both 1.5 times the diameter of the FRP rib.

本实用新型的有益效果:本实用新型提供了一种桥梁加固结构,其在桥梁面板的跨设方向开设凹槽并嵌设有FRP筋,在桥梁面板的纵向(与跨设方向相交的方向)黏贴有条状的FRP片,本实用新型的加固结构采用双方向加固方式,匹配面板结构双向受弯或者受剪特性,改善加固效果。此外,在桥梁面板的跨设方向采用FRP筋作为加固件,FRP筋能够方便的与相邻的构建(支撑梁)进行固定,有利于提高加固结构的稳定性和高度,而在横向方向采用条状的FRP片,则可以避免开槽需求,避免横向开槽的问题。 Beneficial effects of the utility model: the utility model provides a bridge reinforcement structure, which is provided with grooves in the spanning direction of the bridge panel and embedded with FRP ribs, and in the longitudinal direction of the bridge panel (the direction intersecting with the spanning direction) The strip-shaped FRP sheet is pasted, and the reinforcement structure of the utility model adopts a bidirectional reinforcement method, which matches the bidirectional bending or shearing characteristics of the panel structure, and improves the reinforcement effect. In addition, FRP bars are used as reinforcements in the spanning direction of the bridge deck. FRP bars can be easily fixed with adjacent structures (support beams), which is beneficial to improve the stability and height of the reinforced structure. Shaped FRP sheets can avoid the need for slotting and avoid the problem of horizontal slotting.

附图说明 Description of drawings

利用附图对本实用新型作进一步说明,但附图中的实施例不构成对本实用新型的任何限制,对于本领域的普通技术人员,在不付出创造性劳动的前提下,还可以根据以下附图获得其它的附图。 Utilize accompanying drawing to further illustrate the utility model, but the embodiment in the accompanying drawing does not constitute any restriction to the utility model, for those of ordinary skill in the art, under the premise of not paying creative work, also can obtain according to following accompanying drawing Additional drawings.

图1为本实用新型一种基于FRP材料的桥梁加固结构的结构示意图。 Fig. 1 is a structural schematic diagram of a bridge reinforcement structure based on FRP materials of the present invention.

图2为本实用新型的FRP筋和FRP片的排布示意图。 Fig. 2 is a schematic diagram of the arrangement of FRP tendons and FRP sheets of the present invention.

在图1中包括有: In Figure 1 are included:

1——支撑梁、2——桥梁面板、3——凹槽、4——FRP筋、5——固定胶、6——FRP片。 1——supporting beam, 2——bridge panel, 3——groove, 4——FRP tendon, 5——fixing glue, 6——FRP sheet.

具体实施方式 Detailed ways

结合以下实施例对本实用新型作进一步描述。 The utility model is further described in conjunction with the following examples.

本实用新型一种基于FRP材料的桥梁加固结构的具体实施方式,如图1和图2所示,包括支撑梁1和跨设于支撑梁1之间的待加固的桥梁面板2,桥梁面板2的底面沿桥梁面板2的跨设方向(图1、图2中沿横向方向)开设有凹槽3,凹槽3中嵌设有FRP筋4,凹槽3的深度和宽度均为所述FRP筋4的直径的1.5倍,凹槽3中还填充有固定胶5以使所述FRP筋4固定于凹槽3中,FRP筋4的端部锚固于所述支撑梁1,桥梁面板2的底面沿纵向方向(与跨设方向相交的方向,图1中与图纸垂直方向、图2中沿图纸的纵向方向)还黏贴有条状的FRP片6。 A specific embodiment of a bridge reinforcement structure based on FRP materials of the present invention, as shown in Figure 1 and Figure 2, includes a support beam 1 and a bridge panel 2 to be reinforced spanning between the support beams 1, the bridge panel 2 The bottom surface of the bridge panel 2 is provided with a groove 3 along the spanning direction of the bridge panel 2 (in the transverse direction in Fig. 1 and Fig. 2), and FRP ribs 4 are embedded in the groove 3, and the depth and width of the groove 3 are the same as the FRP 1.5 times the diameter of the rib 4, the groove 3 is also filled with fixing glue 5 so that the FRP tendon 4 is fixed in the groove 3, the end of the FRP tendon 4 is anchored to the support beam 1, and the bridge panel 2 The bottom surface is also pasted with a strip-shaped FRP sheet 6 along the longitudinal direction (the direction intersecting the spanning direction, the direction perpendicular to the drawing in FIG. 1 , and the longitudinal direction along the drawing in FIG. 2 ).

上述桥梁加固结构在桥梁面板2的跨设方向开设凹槽3并嵌设有FRP筋4,在桥梁面板2的纵向(与跨设方向相交的方向)黏贴有条状的FRP片6,本实用新型的加固结构采用双方向加固方式,匹配面板结构双向受弯或者受剪特性,改善加固效果。此外,在桥梁面板2的跨设方向采用FRP筋4作为加固件,FRP筋4能够方便的与相邻的构建(支撑梁1)进行固定,有利于提高加固结构的稳定性和高度,而在横向方向采用条状的FRP片6,则可以避免开槽需求,避免横向开槽的问题。 The above-mentioned bridge reinforcement structure has grooves 3 in the spanning direction of the bridge panel 2 and embedded with FRP ribs 4, and a strip-shaped FRP sheet 6 is pasted in the longitudinal direction of the bridge panel 2 (the direction intersecting with the spanning direction). The reinforcement structure of the utility model adopts a bidirectional reinforcement method, which matches the bidirectional bending or shear characteristics of the panel structure and improves the reinforcement effect. In addition, FRP tendons 4 are used as reinforcements in the spanning direction of bridge deck 2, and FRP tendons 4 can be easily fixed with adjacent structures (support beams 1), which is conducive to improving the stability and height of the reinforced structure. The use of strip-shaped FRP sheet 6 in the lateral direction can avoid the need for slotting and the problem of lateral slotting.

最后应当说明的是,以上实施例仅用以说明本实用新型的技术方案,而非对本实用新型保护范围的限制,尽管参照较佳实施例对本实用新型作了详细地说明,本领域的普通技术人员应当理解,可以对本实用新型的技术方案进行修改或者等同替换,而不脱离本实用新型技术方案的实质和范围。 Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (5)

1.一种基于FRP材料的桥梁加固结构,包括支撑梁和跨设于支撑梁之间的待加固的桥梁面板,其特征在于:所述桥梁面板的底面沿桥梁面板的跨设方向开设有凹槽,所述凹槽中嵌设有FRP筋,所述桥梁面板的底面沿与所述凹槽相交的方向黏贴有条状的FRP片。 1. A bridge reinforcement structure based on FRP materials, comprising support beams and bridge panels to be reinforced between the support beams, characterized in that: the bottom surface of the bridge panels is provided with concave holes along the span direction of the bridge panels The groove is embedded with FRP tendons, and the bottom surface of the bridge panel is pasted with a strip-shaped FRP sheet along the direction intersecting with the groove. 2.如权利要求1所述的一种基于FRP材料的桥梁加固结构,其特征在于:所述FRP片与所述凹槽垂直设置。 2. A bridge reinforcement structure based on FRP material according to claim 1, characterized in that: the FRP sheet is arranged vertically to the groove. 3.如权利要求1所述的一种基于FRP材料的桥梁加固结构,其特征在于:所述FRP筋的端部锚固于所述支撑梁。 3. The bridge reinforcement structure based on FRP material according to claim 1, characterized in that: the ends of the FRP tendons are anchored to the support beams. 4.如权利要求1所述的一种基于FRP材料的桥梁加固结构,其特征在于:所述凹槽中还填充有固定胶以使所述FRP筋固定于凹槽中。 4. A bridge reinforcement structure based on FRP material according to claim 1, characterized in that: the groove is also filled with fixing glue to fix the FRP bars in the groove. 5.如权利要求1所述的一种基于FRP材料的桥梁加固结构,其特征在于:所述凹槽的深度和宽度均为所述FRP筋的直径的1.5倍。 5. A bridge reinforcement structure based on FRP material as claimed in claim 1, characterized in that: the depth and width of the groove are both 1.5 times the diameter of the FRP tendon.
CN201420637574.5U 2014-10-30 2014-10-30 A kind of bridge strengthening structure based on FRP material Expired - Lifetime CN204174544U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111041983A (en) * 2019-12-19 2020-04-21 广东工业大学 Composite rib-composite material grid seawater sea sand bridge deck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111041983A (en) * 2019-12-19 2020-04-21 广东工业大学 Composite rib-composite material grid seawater sea sand bridge deck

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