独塔自锚式悬索桥主缆锚固节点三维光弹性试验研究

对福州鼓山大桥主缆锚固区进行三维光弹试验,分析主缆锚固区局部应力分布规律和应力集中程度.结果表明:锚固区与箱梁间传力顺畅;锚垫块作用处、索孔周边、截面突变处、凹角等区域应力集中现象较为明显;索孔核心区上方、锚固区后部的横隔板出现较大的拉应力,在设计中应加强这些部位的构造措施和配筋.

Three dimensions photo-elastic experiment study on cable anchorage zone of self-anchored suspension bridge with one tower

This paper presents the three dimensions photo-elastic experiment of anchorage zone of Gushan Bridge in Fuzhou. The regularity of local stress distribution and the degree of stress concentration in the anchorage zone of main cables are studied. The results show that the transmission of loads between anchorage zone and box girder is smooth; the stresses are large in the rim of cable anchor duct and concave of the model and where the rigidity changes abruptly, the cable load exerts; the major tensile stress exists in the upper region of cable anchor duct and the diaphragm plate behind anchorage zone. Therefore, the structure measurement and reinforcing should be strengthened in the design.