Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prestress UHPC thin layer shear-resistant reinforcing method and reinforced box girder structure thereof
The invention discloses a prestressed UHPC thin-layer shear-resistant reinforcing method and a reinforced box girder structure thereof.The method comprises the steps that firstly, the stress state of a box girder and the included angle between the main tensile stress and the longitudinal direction of a bridge are analyzed, and information of the current stress of the box girder and the information of the included angle between the main tensile stress and the longitudinal direction of the bridge are obtained; then, entering a simulation experiment to obtain information of stress of the box girder web plate after inclined prestress arrangement, cracking load of cracks of the box girder web plate reinforced by adding inclined prestressed tendons and cracking load of cracks of the box girder web plate reinforced by adding vertical prestressed tendons; and finally, performing data comparison to obtain a conclusion that the main tensile stress of the web concrete of the box girder is reduced after the inclined prestressed reinforcements are added to reinforce the box girder, and the improvement of the inclined crack cracking load by the inclined prestress is greater than the improvement of the inclined crack cracking load by the vertical prestressed reinforcements. And a method for increasing the inclined prestressed steel bars is determined to reinforce the box girder.
本发明公开了一种预应力UHPC薄层抗剪加固方法及其加固箱梁结构，先对箱梁的应力状态和主拉应力与桥梁纵向的夹角角度进行分析，得到当前箱梁的应力和主拉应力与桥梁纵向的夹角角度的信息；接着，进入模拟实验，得到斜向预应力布置后箱梁腹板应力、增加斜向预应力筋加固后箱梁腹板裂缝的开裂荷载和增加竖向预应力筋加固后箱梁腹板裂缝的开裂荷载信息；最后，进行数据比较，得出增加倾斜预应力钢筋对箱梁进行加固后，箱梁腹板混凝土的主拉应力得到降低，以及斜向预应力对斜裂缝开裂荷载的提升大于竖向预应力筋对斜裂缝开裂荷载的提升的结论，确定了增加倾斜预应力钢筋的方法对箱梁进行加固。
Prestress UHPC thin layer shear-resistant reinforcing method and reinforced box girder structure thereof
The invention discloses a prestressed UHPC thin-layer shear-resistant reinforcing method and a reinforced box girder structure thereof.The method comprises the steps that firstly, the stress state of a box girder and the included angle between the main tensile stress and the longitudinal direction of a bridge are analyzed, and information of the current stress of the box girder and the information of the included angle between the main tensile stress and the longitudinal direction of the bridge are obtained; then, entering a simulation experiment to obtain information of stress of the box girder web plate after inclined prestress arrangement, cracking load of cracks of the box girder web plate reinforced by adding inclined prestressed tendons and cracking load of cracks of the box girder web plate reinforced by adding vertical prestressed tendons; and finally, performing data comparison to obtain a conclusion that the main tensile stress of the web concrete of the box girder is reduced after the inclined prestressed reinforcements are added to reinforce the box girder, and the improvement of the inclined crack cracking load by the inclined prestress is greater than the improvement of the inclined crack cracking load by the vertical prestressed reinforcements. And a method for increasing the inclined prestressed steel bars is determined to reinforce the box girder.
本发明公开了一种预应力UHPC薄层抗剪加固方法及其加固箱梁结构，先对箱梁的应力状态和主拉应力与桥梁纵向的夹角角度进行分析，得到当前箱梁的应力和主拉应力与桥梁纵向的夹角角度的信息；接着，进入模拟实验，得到斜向预应力布置后箱梁腹板应力、增加斜向预应力筋加固后箱梁腹板裂缝的开裂荷载和增加竖向预应力筋加固后箱梁腹板裂缝的开裂荷载信息；最后，进行数据比较，得出增加倾斜预应力钢筋对箱梁进行加固后，箱梁腹板混凝土的主拉应力得到降低，以及斜向预应力对斜裂缝开裂荷载的提升大于竖向预应力筋对斜裂缝开裂荷载的提升的结论，确定了增加倾斜预应力钢筋的方法对箱梁进行加固。
Prestress UHPC thin layer shear-resistant reinforcing method and reinforced box girder structure thereof
一种预应力UHPC薄层抗剪加固方法及其加固箱梁结构
HE SHAOHUA (Autor:in) / LIU CHANGXI (Autor:in) / CHEN ZHILIANG (Autor:in) / ZHOU DEFENG (Autor:in) / WANG QIAO (Autor:in)
22.10.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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