CN106400666A - Prestressed concrete-corrugated web steel box connecting beam hybrid beam structural system - Google Patents
Prestressed concrete-corrugated web steel box connecting beam hybrid beam structural system Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
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Abstract
本发明公开一种新型混合梁结构体系，包括波形腹板钢箱结合梁段和预应力混凝土箱梁段，预应力混凝土箱梁段位于波形腹板钢箱结合梁段两侧，主要用于连续梁桥或刚构桥，其中主跨跨中部分为波形腹板钢箱结合梁，主跨其余部分和边跨为预应力混凝土箱梁，预应力混凝土箱梁和波形腹板钢箱结合梁之间通过钢混结合段连接过渡。本发明克服了传统预应力混凝土箱梁和钢箱梁单一体系的各自缺点，具有受力性能好、经济性好和跨越能力高等优点。本结构体系有效减轻自重，增加跨越能力，并可减小跨中挠度，避免了预应力混凝土箱梁跨中持续下挠和开裂以及普通钢箱梁腹板稳定性差和桥面铺装耐久性的缺点。
The invention discloses a novel hybrid beam structure system, which comprises a corrugated web steel box combined beam section and a prestressed concrete box girder section. The prestressed concrete box girder section is located on both sides of the corrugated web steel box combined beam section and is mainly used Beam bridges or rigid frame bridges, in which the middle part of the main span is a corrugated web steel box girder, the rest of the main span and side spans are prestressed concrete box girders, the combination of prestressed concrete box girder and corrugated web steel box girder The transition between them is connected by a steel-concrete joint section. The invention overcomes the respective shortcomings of the single system of the traditional prestressed concrete box girder and steel box girder, and has the advantages of good mechanical performance, good economy and high spanning capacity. This structural system can effectively reduce the self-weight, increase the spanning capacity, and reduce the mid-span deflection, avoiding the continuous downward deflection and cracking of the prestressed concrete box girder mid-span, the poor stability of the web of the ordinary steel box girder and the durability of the bridge deck pavement. shortcoming.
Description
技术领域technical field
本发明型属于桥梁工程领域，具体涉及一种预应力混凝土-波形腹板钢箱结合梁混合梁结构体系。The invention belongs to the field of bridge engineering, and in particular relates to a prestressed concrete-corrugated web steel box combined beam composite beam structure system.
背景技术Background technique
桥梁结构自20世纪50年代之后得到了迅速的发展，近年来因为材料科学的不断发展，预应力混凝土梁桥在跨度200m以下时，因为其造价低，刚度大等优点，已经成为了工程技术人员的第一选择。但是工程技术实践发现当跨度较大时，预应力混凝土梁桥存在梁体跨中持续下挠的问题，导致行车不平顺，而且腹板开裂严重，很多桥梁在未达到其设计使用年限的时候就需要进行大修或者直接需要拆除重新建造。采用钢箱梁桥可以在一定程度上解决预应力混凝土梁桥的上述缺点，但是钢箱梁桥成本较高，施工复杂，桥面铺装易损等缺陷限制了其发展和应用。可见，单一形式的预应力混凝土梁桥已经无法满足工程应用的需要。The bridge structure has developed rapidly since the 1950s. In recent years, due to the continuous development of material science, prestressed concrete girder bridges with a span of less than 200m have become a popular choice for engineers and technicians because of their low cost and high rigidity. first choice. However, engineering practice has found that when the span is large, the prestressed concrete girder bridge has the problem of continuous downward deflection in the span of the girder body, resulting in uneven driving and severe web cracking. Many bridges fail when they have not reached their design service life. In need of major repairs or outright demolition and rebuilding. Using steel box girder bridges can solve the above-mentioned shortcomings of prestressed concrete girder bridges to a certain extent, but steel box girder bridges are relatively expensive, complex in construction, and vulnerable to deck pavement, which restricts its development and application. It can be seen that a single form of prestressed concrete girder bridge has been unable to meet the needs of engineering applications.
随着波形钢腹板混凝土组合梁桥的应用越来越广泛，其缺点也越来越受到重视，由于下翼缘混凝土板和下翼缘钢板的结合部浇筑空间狭小，混凝土浇筑质量难以保证。并且，在修建大跨径波形钢腹板混凝土组合连续梁桥时，由于根部梁高很高，需要断面尺寸很大的波形钢腹板，会存在以下的缺点：(1)大断面尺寸波形钢腹板的加工难度很大，大大提高了施工难度和建设成本；(2)大跨径连续梁桥根部抗剪要求很高，大断面尺寸的剪切屈曲问题依旧是困扰工程界的难题；(3)根部梁高太高、波形钢腹板断面尺寸太大、需要设置很长一段的内衬混凝土段，会增加桥梁的自重和建设成本，因此波形钢腹板混凝土组合梁的跨径存在局限性。As corrugated steel web concrete composite girder bridges are more and more widely used, more and more attention has been paid to its shortcomings. Due to the narrow pouring space of the joint between the lower flange concrete slab and the lower flange steel plate, it is difficult to guarantee the quality of concrete pouring. Moreover, when building a long-span corrugated steel web concrete composite continuous girder bridge, due to the high girder height at the root, corrugated steel webs with a large cross-sectional size are required, which will have the following disadvantages: (1) Corrugated steel with a large cross-sectional size The processing of the web is very difficult, which greatly increases the construction difficulty and construction cost; (2) The root shear resistance of long-span continuous girder bridges is very high, and the shear buckling problem of large section sizes is still a problem that plagues the engineering community; ( 3) The height of the root girder is too high, the section size of the corrugated steel web is too large, and a long section of lined concrete section needs to be installed, which will increase the self-weight and construction cost of the bridge. Therefore, the span of the corrugated steel web concrete composite beam has limitations.
随着工程技术水平的发展，桥梁的跨径也在不断增长，主梁在长度方向采用单一的材料往往很难在受力性能和工程经济性方面取得一个良好的平衡点。因此，在上个世纪七十年代，工程技术人员提出了在主梁的长度方向采用钢梁和混凝土梁混合使用的结构形式，如重庆石板坡长江大桥复线桥、温州瓯江大桥等。这种结构形式较单一结构在受力性能和经济性方面有所提升，但仍然存在着不可避免的其他问题：钢梁段和预应力混凝土梁段刚度变化大，过渡段构造复杂，导致过渡不平顺、传力效果差；钢桥面铺装成本较高，施工过程复杂，与混凝土桥面相比铺装的耐久性较差；位于主跨跨中部分的钢梁段处于正弯矩区，顶部钢板受压不能充分发挥钢材的力学特点，且顶板和腹板需要设置大量的加劲肋以避免钢板的稳定性问题。With the development of engineering technology, the span of the bridge is also increasing. It is often difficult to achieve a good balance between the mechanical performance and engineering economy of the main girder using a single material in the length direction. Therefore, in the 1970s, engineers and technicians proposed a structural form in which steel girders and concrete girders were mixed in the length direction of the main girder, such as the double-track bridge of the Shibanpo Yangtze River Bridge in Chongqing and the Oujiang Bridge in Wenzhou. Compared with the single structure, this structural form has improved mechanical performance and economic efficiency, but there are still other inevitable problems: the rigidity of the steel beam section and the prestressed concrete beam section varies greatly, and the structure of the transition section is complex, resulting in uneven transition. Smooth, poor force transmission effect; steel bridge deck pavement cost is high, the construction process is complicated, and the durability of the pavement is poor compared with the concrete bridge deck; the steel beam section located in the middle part of the main span is in the positive bending moment zone, The mechanical characteristics of the steel cannot be fully utilized when the top steel plate is under compression, and a large number of stiffeners need to be provided on the top plate and the web to avoid the stability of the steel plate.
以上所述结构形式大大限制了连续梁桥或刚构桥跨越能力的发展。The above-mentioned structural forms greatly limit the development of the spanning capacity of continuous girder bridges or rigid frame bridges.
发明内容Contents of the invention
发明目的：本发明的目的是提供一种预应力混凝土-波形腹板钢箱结合梁混合梁结构体系，可以充分利用钢材和混凝土材料各自的优点，同时避免其在受力方面的缺点，在提升桥梁的跨越能力的情况下，解决混合梁的连接问题，桥面铺装困难的问题，温度影响下次内力的问题等，大大简化了铺装工作对于机械的要求，并且对于预应力混凝土梁段与钢梁连接导致刚度过渡不平顺，导致行车舒适性降低的缺点进行了改进。Purpose of the invention: the purpose of the invention is to provide a prestressed concrete-corrugated web steel box bonded girder hybrid beam structure system, which can make full use of the respective advantages of steel and concrete materials, while avoiding their shortcomings in terms of stress, and improve In the case of the spanning capacity of the bridge, it solves the problem of the connection of the mixed beam, the difficulty of bridge deck pavement, the problem of temperature affecting the next internal force, etc., which greatly simplifies the mechanical requirements of the pavement work, and for the prestressed concrete beam section The shortcomings of the connection with the steel beam that lead to the uneven stiffness transition and the reduction of driving comfort have been improved.
技术方案：一种预应力混凝土-波形腹板钢箱结合梁混合梁结构体系，包括桥墩和主梁上部构造，所述主梁上部构造包括预应力混凝土箱梁段、波形腹板钢箱结合梁段和钢混结合段，所述波形腹板钢箱结合梁段位于桥梁主跨跨中部分，所述预应力混凝土箱梁段位于主跨支座部分和边跨，所述预应力混凝土箱梁段和波形腹板钢箱结合梁段之间通过钢混结合段连接过渡。Technical solution: a prestressed concrete-corrugated web steel box combined girder hybrid beam structure system, including bridge pier and main girder superstructure, the main girder superstructure includes prestressed concrete box girder section, corrugated web steel box combined girder Section and steel-concrete combination section, the corrugated web steel box combination beam section is located in the middle part of the main span of the bridge, the prestressed concrete box girder section is located in the main span support part and side span, and the prestressed concrete box girder The steel-concrete joint section connects and transitions between the section and the corrugated web steel box combined beam section.
进一步的，波形腹板钢箱结合梁段包括混凝土桥面板和波形腹板钢箱结构，所述混凝土桥面板与所述波形腹板钢箱结构通过剪力件连接。Further, the corrugated web steel box combined girder section includes a concrete bridge deck and a corrugated web steel box structure, and the concrete bridge deck is connected to the corrugated web steel box structure through a shear member.
进一步的，波形腹板钢箱结构包括钢顶板、波形钢腹板和钢底板，所述波形钢腹板分别与钢顶板和钢底板焊接连接，所述钢顶板上设有剪力件，所述混凝土桥面板与所述钢顶板通过剪力件连接，所述钢底板上设置有纵向加劲肋，所述纵向加劲肋与钢底板焊接连接。Further, the corrugated web steel box structure includes a steel top plate, a corrugated steel web and a steel bottom plate, and the corrugated steel web is respectively welded and connected to the steel top plate and the steel bottom plate, and the steel top plate is provided with a shear member. The concrete bridge deck is connected to the steel top plate through a shear member, and the steel bottom plate is provided with longitudinal stiffeners, and the longitudinal stiffeners are welded to the steel bottom plate.
进一步的，波形腹板钢箱结构包括翼缘板、波形钢腹板和钢底板，所述波形钢腹板分别与翼缘板和钢底板焊接连接，所述翼缘板上设有剪力件，所述混凝土桥面板与翼缘板通过剪力件连接，所述钢底板上设置有纵向加劲肋，所述纵向加劲肋与钢底板焊接连接。Further, the corrugated web steel box structure includes a flange plate, a corrugated steel web and a steel bottom plate, and the corrugated steel web is welded to the flange plate and the steel bottom plate respectively, and a shear member is provided on the flange plate , the concrete bridge deck and the flange plate are connected by shear members, the steel bottom plate is provided with longitudinal stiffeners, and the longitudinal stiffeners are welded to the steel bottom plate.
进一步的，混凝土桥面板可根据需求和施工条件进行预制，并预留混凝土后浇缝，与所述钢顶板或翼缘板通过剪力件现浇连接。Further, the concrete bridge deck can be prefabricated according to requirements and construction conditions, and the concrete post-casting joints are reserved, and the steel roof or flange plate is connected with the steel roof or flange plate through the in-situ shearing member.
进一步的，伸入波形钢腹板通过横向钢筋与预应力混凝土箱梁段的腹板连接，在靠近预应力混凝土箱梁段的一侧设有横隔梁，在波形钢腹板钢箱结合梁段与预应力混凝土箱梁段连接处设置空腹式钢横隔板。Further, the corrugated steel web is connected to the web of the prestressed concrete box girder section through transverse reinforcement, and a transverse diaphragm is arranged on the side close to the prestressed concrete box girder section, and the corrugated steel web and steel box combined girder Vierendeel steel diaphragms are set at the joints between the section and the prestressed concrete box girder section.
进一步的，剪力件形式可以为栓钉连接件、PBL连接件等。Further, the form of the shear member may be a stud connector, a PBL connector, and the like.
有益效果：本发明型专利公开了一种预应力混凝土-波形腹板钢箱结合梁混合梁结构体系，包括桥墩和主梁上部构造，其优点在于：Beneficial effects: the patent of the present invention discloses a prestressed concrete-corrugated web steel box combined girder hybrid beam structure system, including bridge pier and main girder superstructure, and its advantages are as follows:
(1)梁体不为单一预应力混凝土结构，在跨中处采用波形腹板钢箱结合梁，可以减轻结构自重，解决预应力混凝土箱梁体跨中持续下挠和开裂的问题，并且可以有效减小梁高，增大通航净空。(1) The beam body is not a single prestressed concrete structure, and the corrugated web steel box bonded beam is used at the mid-span, which can reduce the self-weight of the structure, solve the problem of continuous deflection and cracking in the mid-span of the prestressed concrete box girder body, and can Effectively reduce beam height and increase navigation clearance.
(2)波形腹板钢箱结合梁采用组合结构，位于跨中正弯矩区，受压区采用混凝土顶板形式，受拉区采用钢底板形式，可以充分发挥混凝土和钢材各自的材料性能。(2) The corrugated web steel box combined beam adopts a composite structure and is located in the positive bending moment area of the mid-span. The compression area adopts the form of a concrete roof, and the tension area adopts the form of a steel bottom plate, which can give full play to the respective material properties of concrete and steel.
(3)跨中部位所采用的波形腹板钢箱混凝土结合梁相比现有结合梁，波形腹板钢箱结合梁的腹板采用波形钢腹板，无需设置加劲肋，且由于其纵向褶皱效应，可以减轻钢与混凝土温度膨胀系数差别引起的温度次内力，以及混凝土收缩徐变在钢梁段中引起的次内力；钢底板上设置的纵向加劲肋可以保证钢底板受力均匀，不失稳。(3) The corrugated web steel box concrete composite girder used in the mid-span is compared with the existing composite beam. The effect can reduce the temperature secondary internal force caused by the difference in temperature expansion coefficient between steel and concrete, and the secondary internal force caused by concrete shrinkage and creep in the steel beam section; the longitudinal stiffeners set on the steel floor can ensure that the steel floor is evenly stressed and does not lose stability.
(4)波形腹板钢箱结合梁采用混凝土桥面板，能够解决传统钢-混凝土混合梁中钢箱梁桥面铺装施工复杂、易损坏和耐久性差等问题。(4) The corrugated web steel box girder adopts concrete bridge deck, which can solve the problems of complex construction, easy damage and poor durability of steel box girder deck pavement in traditional steel-concrete hybrid girders.
(5)预应力混凝土箱梁段和波形腹板钢箱结合梁段之间设置钢混过渡段，使预应力混凝土箱梁段和波形腹板钢箱结合梁段连接传力更加可靠，刚度过度更加平顺，增加行车的舒适度。(5) A steel-concrete transition section is set between the prestressed concrete box girder section and the corrugated web steel box combined beam section to make the connection between the prestressed concrete box girder section and the corrugated web steel box combined beam section more reliable and less rigid Smoother and more comfortable driving.
(6)可以在工厂预制混凝土桥面板，在现场采用混凝土后浇缝与波形钢腹板上翼缘板顶部的剪力件连接形成整体，从而加快施工进度。(6) The concrete bridge deck can be prefabricated in the factory, and the concrete post-casting joints are used on site to connect with the shear members on the top of the flange plate on the corrugated steel web to form a whole, thereby speeding up the construction progress.
本发明克服了传统预应力混凝土箱梁和钢箱梁单一体系的各自缺点，具有受力性能好、经济性好和跨越能力高等优点。本结构体系有效减轻自重，增加跨越能力，并可减小跨中挠度，避免了预应力混凝土箱梁跨中持续下挠和开裂和普通钢箱梁腹板稳定性差的缺点。波形腹板钢箱结合梁通过混凝土桥面板与桥面铺装层连接，可以避免普通钢箱梁桥面铺装施工困难、易损坏和耐久性差等问题。其中波形腹板钢箱结合梁采用工厂预制，现场施工便捷，缩短建设工期。The invention overcomes the respective shortcomings of the single system of the traditional prestressed concrete box girder and steel box girder, and has the advantages of good mechanical performance, good economy and high spanning capacity. This structural system can effectively reduce the self-weight, increase the spanning capacity, and reduce the mid-span deflection, avoiding the shortcomings of the prestressed concrete box girder mid-span continuous deflection and cracking and the poor stability of the ordinary steel box girder web. The corrugated web steel box combined girder is connected to the bridge deck pavement through the concrete bridge deck, which can avoid the problems of difficult construction, easy damage and poor durability of ordinary steel box girder deck pavement. Among them, the corrugated web steel box combined beam is prefabricated in the factory, which is convenient for on-site construction and shortens the construction period.
附图说明Description of drawings
下面结合附图对本发明作进一步说明：The present invention will be further described below in conjunction with accompanying drawing:
图1是本发明整体结构示意图。Fig. 1 is a schematic diagram of the overall structure of the present invention.
图2是本发明波形腹板钢箱结合梁段截面示意图。Fig. 2 is a schematic cross-sectional view of a corrugated web steel box combined beam section of the present invention.
图3是本发明波形腹板钢箱结合梁段进一步优选截面示意图。Fig. 3 is a further preferred cross-sectional schematic diagram of the corrugated web steel box combined beam section of the present invention.
图4是本发明波形腹板钢箱结合梁段与预应力混凝土箱梁段连接方式水平剖面俯视示意图。Fig. 4 is a schematic plan view of the horizontal section of the connection mode between the corrugated web steel box beam section and the prestressed concrete box beam section of the present invention.
图5是本发明波形腹板钢箱结合梁段腹板与预应力混凝土箱梁段进一步优选连接方式水平剖面俯视示意图。Fig. 5 is a schematic plan view of a horizontal section of a further preferred connection mode between the web of the steel box with corrugated web and the prestressed concrete box girder section of the present invention.
图6是本发明钢混结合段纵剖面示意图。Fig. 6 is a schematic longitudinal sectional view of the steel-concrete combination section of the present invention.
图7是本发明钢混结合段与预应力混凝土箱梁连接处横截面示意图。Fig. 7 is a schematic cross-sectional view of the joint between the steel-concrete joint section and the prestressed concrete box girder of the present invention.
图8是本发明钢混结合段与波形腹板钢箱结合梁连接处横截面示意图。Fig. 8 is a schematic cross-sectional view of the connection between the steel-concrete joint section and the corrugated web steel box joint beam of the present invention.
图中：1、桥墩，2、预应力混凝土箱梁段，3、波形腹板钢箱结合梁段，4、钢混结合段，3.1、混凝土桥面板，3.2、剪力件，3.3、钢箱结合梁段处波形钢腹板，3.4、纵向加劲肋，3.5、钢底板，3.6、翼缘板，3.7、钢顶板，4.1、钢混结合段处波形钢腹板，4.2、内衬混凝土，4.3、钢底板，4.4、横隔梁，4.5、底板栓钉，4.6腹板栓钉，4.7、横向钢筋，4.8空腹式钢横隔板。In the figure: 1. Bridge pier, 2. Prestressed concrete box girder section, 3. Corrugated web steel box combined beam section, 4. Steel-concrete combined section, 3.1. Concrete bridge deck, 3.2. Shear member, 3.3. Steel box Corrugated steel web at the joint beam section, 3.4, longitudinal stiffeners, 3.5, steel bottom plate, 3.6, flange plate, 3.7, steel roof, 4.1, corrugated steel web at the steel-concrete joint section, 4.2, lined with concrete, 4.3 , Steel floor, 4.4, diaphragm, 4.5, floor studs, 4.6 web studs, 4.7, transverse reinforcement, 4.8 fasting steel diaphragm.
具体实施方式detailed description
以下结合附图所示实例对本发明作进一步说明。The present invention will be further described below in conjunction with the examples shown in the accompanying drawings.
本发明公开了一种预应力混凝土-波形腹板钢箱结合梁混合梁结构体系，包括桥墩和主梁上部构造，主梁上部构造包括预应力混凝土箱梁段2、波形腹板钢箱结合梁段3和钢混结合段4，波形腹板钢箱结合梁段3位于桥梁主跨跨中部分，为主跨跨径的1/4～1/3，预应力混凝土箱梁2位于主跨支座部分和边跨，预应力混凝土箱梁段2和波形腹板钢箱结合梁段3之间通过钢混结合段4连接过渡。The invention discloses a prestressed concrete-corrugated web steel box combined girder hybrid beam structure system, which includes a bridge pier and a main girder upper structure, and the main girder upper structure includes a prestressed concrete box girder section 2, a corrugated web steel box combined girder Section 3 and steel-concrete combination section 4, section 3 of corrugated web steel box combined beam is located in the middle part of the main span of the bridge, 1/4 to 1/3 of the span of the main span, prestressed concrete box girder 2 is located in the main span support The seat part and the side span, the prestressed concrete box girder section 2 and the corrugated web steel box combined beam section 3 are connected and transitioned through the steel-concrete combined section 4 .
本发明所示预应力混凝土-波形腹板钢箱结合梁混合梁结构体系可在桥梁建设中根据需求多处设置，其中在桥梁跨中段采用波形腹板钢箱结合梁3，在桥墩支点处附近采用预应力混凝土箱梁2，可减轻桥梁自重，减小桥梁跨中挠度，提高桥梁跨越能力。The prestressed concrete-corrugated web steel box combined girder hybrid girder structural system shown in the present invention can be installed in multiple places according to requirements in bridge construction, wherein the corrugated web steel box combined beam 3 is used in the middle of the bridge span, and near the fulcrum of the pier The use of prestressed concrete box girder 2 can reduce the self-weight of the bridge, reduce the mid-span deflection of the bridge, and improve the spanning capacity of the bridge.
本发明中，预应力混凝土箱梁区段2与波形腹板钢箱结合梁段3沿纵向通过钢混结合段4连接在一起，构成连续梁体系。波形腹板钢箱结合梁3的波形钢腹板3.3伸入预应力混凝土箱梁段2腹板内，并且在钢混结合段4腹板内侧浇筑内衬混凝土4.2，伸入的波形钢腹板4.1通过腹板栓钉4.6与内衬混凝土4.2连接。波形腹板钢箱结合梁段3的伸入的波形钢腹板4.1，通过横向钢筋4.7或者腹板栓钉4.6与预应力混凝土箱梁段2的腹板相连接。波形腹板钢箱结合梁段3钢底板3.5伸入预应力混凝土箱梁底板内，钢底板3.5上设置剪力件，并浇筑内衬混凝土，为大跨桥梁提供了理想的过渡方式，保证了连接段的刚度过渡平顺，确保行车舒适。In the present invention, the prestressed concrete box girder section 2 and the corrugated web steel box combined beam section 3 are connected longitudinally through the steel-concrete combined section 4 to form a continuous beam system. The corrugated steel web 3.3 of the corrugated web steel box combined beam 3 extends into the prestressed concrete box girder section 2 web, and the lining concrete 4.2 is poured inside the web of the steel-concrete combined section 4, and the corrugated steel web extended 4.1 is connected with the lining concrete 4.2 through the web stud 4.6. The extended corrugated steel web 4.1 of the corrugated web steel box combined with the beam section 3 is connected to the web of the prestressed concrete box girder section 2 through transverse steel bars 4.7 or web studs 4.6. The corrugated web steel box combined beam section 3 steel bottom plate 3.5 extends into the prestressed concrete box girder bottom plate, and the steel bottom plate 3.5 is provided with shear members and lined with concrete, which provides an ideal transition method for long-span bridges and ensures The rigidity transition of the connecting section is smooth, ensuring driving comfort.
作为本发明的实施方案，波形腹板钢箱结合梁3包括混凝土桥面板3.1和波形腹板钢箱结构，混凝土桥面板3.1与波形钢腹板钢箱结构通过剪力键3.2连接。As an embodiment of the present invention, the corrugated web steel box combined girder 3 includes a concrete bridge deck 3.1 and a corrugated web steel box structure, and the concrete bridge deck 3.1 is connected to the corrugated steel web steel box structure through a shear key 3.2.
作为本发明的实施方案，波形腹板钢箱结构包括钢顶板3.7、波形钢腹板3.3和钢底板3.5，波形钢腹板3.3分别与钢顶板3.7和钢底板3.5焊接连接，钢顶板3.7上设有纵向剪力件3.2，混凝土桥面板3.1与钢顶板3.7通过剪力件3.2连接。As an embodiment of the present invention, the corrugated web steel box structure includes a steel top plate 3.7, a corrugated steel web 3.3 and a steel bottom plate 3.5, and the corrugated steel web 3.3 is welded to the steel top plate 3.7 and the steel bottom plate 3.5 respectively, and the steel top plate 3.7 is provided with There are longitudinal shear members 3.2, and the concrete bridge deck 3.1 and the steel roof 3.7 are connected through the shear members 3.2.
作为本发明的实施方案，波形腹板钢箱结构包括翼缘板3.6、波形钢腹板3.3和钢底板3.5，翼缘板3.6与波形钢腹板3.3上缘焊接连接，混凝土桥面板3.1与翼缘板3.6通过剪力件3.2连接。As an embodiment of the present invention, the corrugated web steel box structure includes a flange plate 3.6, a corrugated steel web 3.3 and a steel bottom plate 3.5, the flange plate 3.6 is welded to the upper edge of the corrugated steel web 3.3, and the concrete bridge deck 3.1 is connected to the wing The flanges 3.6 are connected by shear members 3.2.
作为本发明的优选方案，混凝土桥面板3.1可根据需求和施工条件进行预制，并预留混凝土后浇缝，与翼缘板3.6通过剪力件3.2现浇连接。As a preferred solution of the present invention, the concrete bridge deck 3.1 can be prefabricated according to requirements and construction conditions, and the concrete post-cast joints are reserved, and connected with the flange plate 3.6 through the shear member 3.2.
作为本发明的实施方案，钢底板3.5上设置有纵向加劲肋3.4，纵向加劲肋3.4与钢底板3.5焊接连接。As an embodiment of the present invention, the steel bottom plate 3.5 is provided with longitudinal stiffeners 3.4, and the longitudinal stiffeners 3.4 are welded to the steel bottom plate 3.5.
作为本发明的实施方案，钢混结合段4是连接预应力混凝土箱梁段2和波形腹板钢箱结合梁段3的过渡部分，设置于正、负弯矩交替作用区，其连接构造包括伸入预应力混凝土箱梁2腹板内的伸入波形钢腹板4.1，在伸入波形钢腹板4.1内侧浇筑内衬混凝土4.2形成组合腹板，在钢底板4.3上设置剪力件4.5并浇筑混凝土形成组合底板，且在与预应力混凝土箱梁段2的连接处设有横隔梁4.4。As an embodiment of the present invention, the steel-concrete joint section 4 is the transition part connecting the prestressed concrete box girder section 2 and the corrugated web steel box beam section 3, and is arranged in the positive and negative bending moment alternating action zone, and its connection structure includes The corrugated steel web 4.1 extending into the prestressed concrete box girder 2 web is poured with lining concrete 4.2 inside the corrugated steel web 4.1 to form a composite web, and the shear member 4.5 is set on the steel bottom plate 4.3 and Concrete is poured to form a combined bottom plate, and a transverse beam 4.4 is arranged at the connection with the prestressed concrete box girder section 2 .
作为本发明的实施方案，伸入波形钢腹板4.1通过剪力件与内衬混凝土4.2连接；伸入波形钢腹板4.1通过横向钢筋4.7与预应力混凝土梁2的腹板连接。As an embodiment of the present invention, the extended corrugated steel web 4.1 is connected to the lining concrete 4.2 through a shear member; the extended corrugated steel web 4.1 is connected to the web of the prestressed concrete beam 2 through a transverse reinforcement 4.7.
作为本发明的优选方案，钢混结合段4的伸入波形钢腹板4.1通过腹板栓钉4.6与预应力混凝土箱梁2的腹板连接。As a preferred solution of the present invention, the protruding corrugated steel web 4.1 of the steel-concrete joint section 4 is connected to the web of the prestressed concrete box girder 2 through web pegs 4.6.
作为本发明的实施方案，在钢混结合段4与波形腹板钢箱结合梁段3的连接处设置空腹式钢横隔板4.8。As an embodiment of the present invention, a vierendeel steel diaphragm 4.8 is provided at the joint between the steel-concrete joint section 4 and the corrugated web steel box joint beam section 3 .
作为本发明的实施方案，剪力件形式可以为栓钉连接件、PBL连接件等。As an embodiment of the present invention, the form of the shear member may be a stud connector, a PBL connector, or the like.
作为本发明的实施方案，混合梁结构体系可以应用于连续梁桥或刚构桥。As an embodiment of the present invention, the hybrid girder structural system can be applied to continuous girder bridges or rigid frame bridges.
当然，本发明创造不局限于上述实施方式，熟悉本领域的技术人员在不违背本发明创造的精神前提下还可作出等同变形或者替换，这些等同的变形和替换均包含在本申请权利要求所限定的范围之内。Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can also make equivalent deformations or replacements without violating the spirit of the present invention. These equivalent deformations and replacements are all included in the claims of this application. within the limited range.
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