A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design method of extradosed cable-stayed bridge cable beam anchoring system
The invention relates to the technical field of bridge structures, in particular to a design method of a cable-beam anchoring system of an extradosed cable-stayed bridge, which is characterized in that horizontal component forces generated when a stay cable is anchored on a box beam respectively act on a top plate and a bottom plate of the box beam; meanwhile, according to the magnitude of the axial force of the stay cable, the stress acting on the bottom plate of the box girder is selected to be one of tensile stress or compressive stress. The extradosed cable-stayed bridge cable beam anchoring structure has the advantages that structural force transmission is clear, concentrated force borne by an existing extradosed cable-stayed bridge cable beam anchoring structure is effectively dispersed, shear stress and tensile stress of the contact face of the anchoring block and the beam bottom are reduced, and structural safety and durability are improved; the stress direction of the web is changed, the inclined web parallel to the stay cable effectively coordinates and distributes the cable pulling force of cable beam anchoring of the upper and lower cross beams, and the adverse effect caused by cable force eccentricity under the condition of the straight web is obviously improved; and the structure is simple and reasonable, different anchoring systems can be selected according to engineering requirements, construction is convenient, and the device can be matched with prefabricated construction and is suitable for popularization.
本发明涉及桥梁结构技术领域，尤其是一种矮塔斜拉桥索梁锚固体系的设计方法，将所述斜拉索锚固于所述箱梁时产生的水平分力分别作用于所述箱梁的顶板和底板；同时，根据所述斜拉索的轴力大小，将其作用于所述箱梁的底板的应力选择为拉应力或压应力中的一种。本发明的优点是：结构传力清晰，有效分散现有的矮塔斜拉桥索梁锚固结构承受的集中力，降低锚固块与梁底接触面剪应力及拉应力，提高结构安全性及耐久性；改变腹板的受力方向，平行于斜拉索的斜腹板有效的协调和分配上下横梁索梁锚固的拉索力，显著改善直腹板情况下由索力偏心引起的不利影响；结构简单合理，可根据工程需要选择不同的锚固体系，施工方便，可配合预制化施工进行，适于推广。
Design method of extradosed cable-stayed bridge cable beam anchoring system
The invention relates to the technical field of bridge structures, in particular to a design method of a cable-beam anchoring system of an extradosed cable-stayed bridge, which is characterized in that horizontal component forces generated when a stay cable is anchored on a box beam respectively act on a top plate and a bottom plate of the box beam; meanwhile, according to the magnitude of the axial force of the stay cable, the stress acting on the bottom plate of the box girder is selected to be one of tensile stress or compressive stress. The extradosed cable-stayed bridge cable beam anchoring structure has the advantages that structural force transmission is clear, concentrated force borne by an existing extradosed cable-stayed bridge cable beam anchoring structure is effectively dispersed, shear stress and tensile stress of the contact face of the anchoring block and the beam bottom are reduced, and structural safety and durability are improved; the stress direction of the web is changed, the inclined web parallel to the stay cable effectively coordinates and distributes the cable pulling force of cable beam anchoring of the upper and lower cross beams, and the adverse effect caused by cable force eccentricity under the condition of the straight web is obviously improved; and the structure is simple and reasonable, different anchoring systems can be selected according to engineering requirements, construction is convenient, and the device can be matched with prefabricated construction and is suitable for popularization.
本发明涉及桥梁结构技术领域，尤其是一种矮塔斜拉桥索梁锚固体系的设计方法，将所述斜拉索锚固于所述箱梁时产生的水平分力分别作用于所述箱梁的顶板和底板；同时，根据所述斜拉索的轴力大小，将其作用于所述箱梁的底板的应力选择为拉应力或压应力中的一种。本发明的优点是：结构传力清晰，有效分散现有的矮塔斜拉桥索梁锚固结构承受的集中力，降低锚固块与梁底接触面剪应力及拉应力，提高结构安全性及耐久性；改变腹板的受力方向，平行于斜拉索的斜腹板有效的协调和分配上下横梁索梁锚固的拉索力，显著改善直腹板情况下由索力偏心引起的不利影响；结构简单合理，可根据工程需要选择不同的锚固体系，施工方便，可配合预制化施工进行，适于推广。
Design method of extradosed cable-stayed bridge cable beam anchoring system
一种矮塔斜拉桥索梁锚固体系的设计方法
ZHANG XINXIN (author) / RUAN BAIYI (author) / CHEN DONGJU (author) / CHEN HUAIZHI (author) / WANG FAWU (author) / CHEN NIANNIAN (author) / WANG HONGFEI (author) / QI LIN (author)
2023-11-10
Patent
Electronic Resource
Chinese
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