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A platform for research: civil engineering, architecture and urbanism
Laminated composite beam structure suitable for large-span beam bridge and construction method
The invention provides a laminated composite beam structure suitable for a large-span beam bridge and a construction method, and relates to the field of bridges. The concrete beams are distributed in a main pier top hogging moment area of the bridge, located below the steel box beams and combined in a laminated mode; the concrete beam is provided with an embedded part, the embedded part is fixedly connected with the bottom face of the steel box beam on the top face of the concrete beam, and a steel-concrete combination face is formed at the fixed connection position. Aiming at the problems of tension and compression anisotropy, large dead weight, insufficient spanning capability, instability of a high web plate of a steel box girder, difficulty in guaranteeing the welding quality of a thick plate, high manufacturing cost and large hoisting construction risk of a large section of a prestressed concrete beam at present, a laminated composite beam of an upper-layer steel box girder and a lower-layer concrete beam is adopted in a hogging moment area at the top of a main pier; the other beam sections adopt a steel box beam structure system, so that the stress requirement is met, the dead weight is reduced, the overall rigidity of the structure is improved, and the spanning capacity is improved.
本发明提供一种适用于大跨径梁桥的叠层结合梁结构及施工方法，涉及桥梁领域，包括：钢箱梁，沿桥梁纵向通长布置；混凝土梁，分布于桥梁的主墩顶负弯矩区，位于钢箱梁的下方并叠层结合；混凝土梁设有预埋件，预埋件于混凝土梁顶面固连钢箱梁底面，固连位置形成钢混结合面；针对目前预应力混凝土梁拉压异性、自重大、跨越能力不足，钢箱梁高腹板失稳、厚板焊接质量不易保证、造价较高、大节段吊装施工风险大的问题，在主墩顶负弯矩区采用上层钢箱梁和下层混凝土梁的叠层结合梁，其余梁段采用钢箱梁的结构体系，在满足受力需求的同时减小自重，提高结构整体刚度，增加跨越能力。
Laminated composite beam structure suitable for large-span beam bridge and construction method
The invention provides a laminated composite beam structure suitable for a large-span beam bridge and a construction method, and relates to the field of bridges. The concrete beams are distributed in a main pier top hogging moment area of the bridge, located below the steel box beams and combined in a laminated mode; the concrete beam is provided with an embedded part, the embedded part is fixedly connected with the bottom face of the steel box beam on the top face of the concrete beam, and a steel-concrete combination face is formed at the fixed connection position. Aiming at the problems of tension and compression anisotropy, large dead weight, insufficient spanning capability, instability of a high web plate of a steel box girder, difficulty in guaranteeing the welding quality of a thick plate, high manufacturing cost and large hoisting construction risk of a large section of a prestressed concrete beam at present, a laminated composite beam of an upper-layer steel box girder and a lower-layer concrete beam is adopted in a hogging moment area at the top of a main pier; the other beam sections adopt a steel box beam structure system, so that the stress requirement is met, the dead weight is reduced, the overall rigidity of the structure is improved, and the spanning capacity is improved.
本发明提供一种适用于大跨径梁桥的叠层结合梁结构及施工方法，涉及桥梁领域，包括：钢箱梁，沿桥梁纵向通长布置；混凝土梁，分布于桥梁的主墩顶负弯矩区，位于钢箱梁的下方并叠层结合；混凝土梁设有预埋件，预埋件于混凝土梁顶面固连钢箱梁底面，固连位置形成钢混结合面；针对目前预应力混凝土梁拉压异性、自重大、跨越能力不足，钢箱梁高腹板失稳、厚板焊接质量不易保证、造价较高、大节段吊装施工风险大的问题，在主墩顶负弯矩区采用上层钢箱梁和下层混凝土梁的叠层结合梁，其余梁段采用钢箱梁的结构体系，在满足受力需求的同时减小自重，提高结构整体刚度，增加跨越能力。
Laminated composite beam structure suitable for large-span beam bridge and construction method
一种适用于大跨径梁桥的叠层结合梁结构及施工方法
XU ZHAO (author) / LI HUAIFENG (author) / BAI GUANGYAO (author) / WANG MINGXIN (author) / MA XUEAI (author) / XU CHANGZE (author) / WANG ZHIYING (author) / WANG HONGBO (author) / WANG LI (author) / JI CHUNXIAO (author)
2023-08-18
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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