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A platform for research: civil engineering, architecture and urbanism
Local prestress reinforced prefabricated hollow slab girder bridge hinge joint structure and construction method
The invention discloses a local prestress reinforced prefabricated hollow slab girder bridge hinge joint structure and a construction method. The local prestress reinforced prefabricated hollow slab girder bridge hinge joint structure comprises shear steel bars, vertical U-shaped ribs, hinge joint U-shaped ribs and excitation reserved pieces. Each vertical U-shaped rib is vertically embedded in the web plate with an opening facing downwards, and the top end of each vertical U-shaped rib is exposed and connected with the top of the corresponding shear steel bar; each hinge joint U-shaped rib is made of iron-based shape memory alloy; the connecting piece sequentially comprises a U-shaped horizontal section, an inclined section, a bottom horizontal section and an opening threaded section from top to bottom. The U-shaped horizontal section is positioned in the hinge joint below the scissor steel bar and is connected with the U-shaped horizontal section of the hinge joint U-shaped rib in the other prefabricated hollow slab beam in the hinge joint; the periphery of each opening threaded section is in threaded connection with an excitation reserved piece and then connected with excitation equipment. By arranging the iron-based shape memory alloy U-shaped ribs, the problems that the hinge joint cracking load of the hollow plate girder bridge is low, vertical cracks are prone to occurring, the bearing is low, and damage is prone to occurring are solved, and the overall mechanical property of the hollow plate girder bridge is improved.
本发明公开了局部预应力强化的预制空心板梁桥铰缝构造及施工方法，包括剪刀钢筋、竖向U型筋、铰缝U型筋和激励预留件；每个竖向U型筋均开口朝下竖直埋设在腹板内，且顶端外露，并与对应剪刀钢筋顶部连接；每个铰缝U型筋的材料均为铁基形状记忆合金；其从上至下依次包括U型水平段、倾斜段、底部水平段和开口螺纹段；U型水平段位于剪刀钢筋下方的铰缝内，并与铰缝内另一个预制空心板梁中铰缝U型筋的U型水平段相连；每个开口螺纹段外周均螺纹连接激励预留件，进而连接激励设备。本发明通过配置铁基形状记忆合金U型筋，从而解决空心板梁桥铰缝开裂荷载较低，易出现竖向裂缝，承载较低，易破坏的问题，提高空心板梁桥的整体力学性能。
Local prestress reinforced prefabricated hollow slab girder bridge hinge joint structure and construction method
The invention discloses a local prestress reinforced prefabricated hollow slab girder bridge hinge joint structure and a construction method. The local prestress reinforced prefabricated hollow slab girder bridge hinge joint structure comprises shear steel bars, vertical U-shaped ribs, hinge joint U-shaped ribs and excitation reserved pieces. Each vertical U-shaped rib is vertically embedded in the web plate with an opening facing downwards, and the top end of each vertical U-shaped rib is exposed and connected with the top of the corresponding shear steel bar; each hinge joint U-shaped rib is made of iron-based shape memory alloy; the connecting piece sequentially comprises a U-shaped horizontal section, an inclined section, a bottom horizontal section and an opening threaded section from top to bottom. The U-shaped horizontal section is positioned in the hinge joint below the scissor steel bar and is connected with the U-shaped horizontal section of the hinge joint U-shaped rib in the other prefabricated hollow slab beam in the hinge joint; the periphery of each opening threaded section is in threaded connection with an excitation reserved piece and then connected with excitation equipment. By arranging the iron-based shape memory alloy U-shaped ribs, the problems that the hinge joint cracking load of the hollow plate girder bridge is low, vertical cracks are prone to occurring, the bearing is low, and damage is prone to occurring are solved, and the overall mechanical property of the hollow plate girder bridge is improved.
本发明公开了局部预应力强化的预制空心板梁桥铰缝构造及施工方法，包括剪刀钢筋、竖向U型筋、铰缝U型筋和激励预留件；每个竖向U型筋均开口朝下竖直埋设在腹板内，且顶端外露，并与对应剪刀钢筋顶部连接；每个铰缝U型筋的材料均为铁基形状记忆合金；其从上至下依次包括U型水平段、倾斜段、底部水平段和开口螺纹段；U型水平段位于剪刀钢筋下方的铰缝内，并与铰缝内另一个预制空心板梁中铰缝U型筋的U型水平段相连；每个开口螺纹段外周均螺纹连接激励预留件，进而连接激励设备。本发明通过配置铁基形状记忆合金U型筋，从而解决空心板梁桥铰缝开裂荷载较低，易出现竖向裂缝，承载较低，易破坏的问题，提高空心板梁桥的整体力学性能。
Local prestress reinforced prefabricated hollow slab girder bridge hinge joint structure and construction method
局部预应力强化的预制空心板梁桥铰缝构造及施工方法
DONG ZHIQIANG (author) / SUN XINLIANG (author) / ZOU CUI (author) / ZHU HONG (author) / WU GANG (author)
2024-03-08
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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