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UHPC-NC composite beam system based on CFRP prestressed tendons and construction method
The invention discloses a UHPC-NC composite beam system based on CFRP prestressed tendons and a construction method, and the UHPC-NC composite beam system comprises a tensile area beam body which is an ultra-high performance concrete beam prepared based on the minimum bulk density principle, namely a UHPC beam; the prestressed tendons are arranged in the length direction of the tensile area beam body and located at the top and the bottom in the tensile area beam body, and the prestressed tendons are carbon fiber reinforced composite material (CFRP) tendons constructed through a pre-tensioning method; and the bridge deck slab formed by cast-in-place or prefabrication is connected with the tensile area beam body through shear bars. According to the invention, the high tensile strength and compressive strength of the UHPC and the CFRP are fully utilized, so that the UHPC and the CFRP jointly reach a limit state, the deformation capability is good, and the problem of bond wrapping of the prestressed tendon is solved. The method has the advantages of being excellent in structural stress, high in bonding strength, simplified in construction, energy-saving and emission-reducing.
本发明公开了一种基于CFRP预应力筋的UHPC‑NC组合梁体系及施工方法，包括：受拉区梁体，为基于最小堆积密度原理制备而成的超高性能混凝土梁即UHPC梁；沿所述受拉区梁体长度方向设置的预应力筋，位于所述受拉区梁体内的顶部和底部，所述预应力筋为采用先张法施工的碳纤维增强复合材料CFRP筋；现场浇筑或者预制而成的桥面板，与所述受拉区梁体采用剪力筋连接。本发明充分利用UHPC和CFRP两种材料的高抗拉及抗压强度，使其共同达到极限状态，且有良好的变形能力，并解决了预应力筋的握裹性问题。具有结构受力优、黏结强度高、简化施工、节能减排的优点。
UHPC-NC composite beam system based on CFRP prestressed tendons and construction method
The invention discloses a UHPC-NC composite beam system based on CFRP prestressed tendons and a construction method, and the UHPC-NC composite beam system comprises a tensile area beam body which is an ultra-high performance concrete beam prepared based on the minimum bulk density principle, namely a UHPC beam; the prestressed tendons are arranged in the length direction of the tensile area beam body and located at the top and the bottom in the tensile area beam body, and the prestressed tendons are carbon fiber reinforced composite material (CFRP) tendons constructed through a pre-tensioning method; and the bridge deck slab formed by cast-in-place or prefabrication is connected with the tensile area beam body through shear bars. According to the invention, the high tensile strength and compressive strength of the UHPC and the CFRP are fully utilized, so that the UHPC and the CFRP jointly reach a limit state, the deformation capability is good, and the problem of bond wrapping of the prestressed tendon is solved. The method has the advantages of being excellent in structural stress, high in bonding strength, simplified in construction, energy-saving and emission-reducing.
本发明公开了一种基于CFRP预应力筋的UHPC‑NC组合梁体系及施工方法，包括：受拉区梁体，为基于最小堆积密度原理制备而成的超高性能混凝土梁即UHPC梁；沿所述受拉区梁体长度方向设置的预应力筋，位于所述受拉区梁体内的顶部和底部，所述预应力筋为采用先张法施工的碳纤维增强复合材料CFRP筋；现场浇筑或者预制而成的桥面板，与所述受拉区梁体采用剪力筋连接。本发明充分利用UHPC和CFRP两种材料的高抗拉及抗压强度，使其共同达到极限状态，且有良好的变形能力，并解决了预应力筋的握裹性问题。具有结构受力优、黏结强度高、简化施工、节能减排的优点。
UHPC-NC composite beam system based on CFRP prestressed tendons and construction method
一种基于CFRP预应力筋的UHPC-NC组合梁体系及施工方法
SUN XIANGDONG (author) / ZENG GUANFENG (author) / WANG LEI (author) / SEO DONG-JIN (author)
2023-09-01
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
Behaviors of Concrete Beam Prestressed with External CFRP Tendons
| British Library Conference Proceedings | 2009
Behaviors of Concrete Beam Prestressed with External CFRP Tendons
| British Library Online Contents | 2009
Behaviors of Concrete Beam Prestressed with External CFRP Tendons
| Trans Tech Publications | 2008
Performance of an AASHTO Beam Bridge Prestressed with CFRP Tendons
| Online Contents | 2013