Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bridge deck slab anti-crack structure of hogging moment area of fabricated steel-concrete composite beam and construction method of bridge deck slab anti-crack structure
The invention provides an assembly type steel-concrete composite beam hogging moment area bridge deck slab anti-crack structure and a construction method thereof, and belongs to the field of bridges. The assembly type steel-concrete composite beam hogging moment area bridge deck slab anti-crack structure is composed of a prefabricated UHPC-NC bridge deck slab, detachable high-strength bolt shear keys and a steel main beam; the steel main beam and the prefabricated UHPC-NC bridge deck slab are connected through detachable high-strength bolt shear keys. Aiming at the problems that the bridge deck slab in the hogging moment area of the steel plate composite beam bridge is easy to crack when being pulled and the anti-fatigue performance is poor, the UHPC material with excellent tensile performance is used for preparing the prefabricated UHPC-NC laminated bridge deck slab in the hogging moment area, so that the anti-cracking performance of the bridge deck slab is improved, the crack width is reduced, and the durability is improved; the detachable high-strength bolts are adopted to replace traditional welding studs to connect the prefabricated UHPC-NC bridge deck with the steel main beam, so that when the bridge deck in the hogging moment area is stressed, the internal stress of the prefabricated UHPC-NC bridge deck can be released through limited slippage between the detachable high-strength bolt shear keys and the steel main beam, and then the anti-cracking performance of the composite beam bridge deck is improved.
本发明提出了装配式钢混组合梁负弯矩区桥面板抗裂结构及其施工方法，属于桥梁领域，装配式钢混组合梁负弯矩区桥面板抗裂结构由预制UHPC‑NC桥面板、可拆卸高强螺栓剪力键和钢主梁组成，钢主梁和预制UHPC‑NC桥面板通过可拆卸高强螺栓剪力键连接。本发明针对钢板组合梁桥负弯矩区桥面板受拉易开裂，抗疲劳性能较差的问题，将抗拉性能优异的UHPC材料用于负弯矩区预制UHPC‑NC叠合桥面板的制备，以提高桥面板的抗裂性能，降低裂缝宽度，提高耐久性；采用可拆高强螺栓替代传统焊接栓钉将预制UHPC‑NC桥面板与钢主梁进行连接，实现负弯矩区桥面板在受到应力时，可以通过可拆卸高强螺栓剪力键与钢主梁之间的有限滑移，释放预制UHPC‑NC桥面板内应力，进而提高组合梁桥面板的抗裂性能。
Bridge deck slab anti-crack structure of hogging moment area of fabricated steel-concrete composite beam and construction method of bridge deck slab anti-crack structure
The invention provides an assembly type steel-concrete composite beam hogging moment area bridge deck slab anti-crack structure and a construction method thereof, and belongs to the field of bridges. The assembly type steel-concrete composite beam hogging moment area bridge deck slab anti-crack structure is composed of a prefabricated UHPC-NC bridge deck slab, detachable high-strength bolt shear keys and a steel main beam; the steel main beam and the prefabricated UHPC-NC bridge deck slab are connected through detachable high-strength bolt shear keys. Aiming at the problems that the bridge deck slab in the hogging moment area of the steel plate composite beam bridge is easy to crack when being pulled and the anti-fatigue performance is poor, the UHPC material with excellent tensile performance is used for preparing the prefabricated UHPC-NC laminated bridge deck slab in the hogging moment area, so that the anti-cracking performance of the bridge deck slab is improved, the crack width is reduced, and the durability is improved; the detachable high-strength bolts are adopted to replace traditional welding studs to connect the prefabricated UHPC-NC bridge deck with the steel main beam, so that when the bridge deck in the hogging moment area is stressed, the internal stress of the prefabricated UHPC-NC bridge deck can be released through limited slippage between the detachable high-strength bolt shear keys and the steel main beam, and then the anti-cracking performance of the composite beam bridge deck is improved.
本发明提出了装配式钢混组合梁负弯矩区桥面板抗裂结构及其施工方法，属于桥梁领域，装配式钢混组合梁负弯矩区桥面板抗裂结构由预制UHPC‑NC桥面板、可拆卸高强螺栓剪力键和钢主梁组成，钢主梁和预制UHPC‑NC桥面板通过可拆卸高强螺栓剪力键连接。本发明针对钢板组合梁桥负弯矩区桥面板受拉易开裂，抗疲劳性能较差的问题，将抗拉性能优异的UHPC材料用于负弯矩区预制UHPC‑NC叠合桥面板的制备，以提高桥面板的抗裂性能，降低裂缝宽度，提高耐久性；采用可拆高强螺栓替代传统焊接栓钉将预制UHPC‑NC桥面板与钢主梁进行连接，实现负弯矩区桥面板在受到应力时，可以通过可拆卸高强螺栓剪力键与钢主梁之间的有限滑移，释放预制UHPC‑NC桥面板内应力，进而提高组合梁桥面板的抗裂性能。
Bridge deck slab anti-crack structure of hogging moment area of fabricated steel-concrete composite beam and construction method of bridge deck slab anti-crack structure
装配式钢混组合梁负弯矩区桥面板抗裂结构及其施工方法
YANG DAHAI (Autor:in) / WU ZHIGANG (Autor:in) / WANG ZHITIAN (Autor:in) / LEI JIN (Autor:in) / WANG KAI (Autor:in) / SHAN WENSHENG (Autor:in) / WANG QIAN (Autor:in) / SHI JUN (Autor:in) / KANG JIAYUAN (Autor:in) / SHI FEITING (Autor:in)
27.10.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
Prefabricated bridge deck slab and composite beam hogging moment area structure
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