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结合福州市三县洲闽江大桥斜拉索锚固区受力分析的科研项目,采用光弹性模型实验,分析了主梁锚固区和塔柱锚固区的空间应力状态,研究探讨了在大吨位预应力作用下,群锚锚固区的应力集中程度及局部应力的一般分布规律,从而证明了锚具构造中采用喇叭管的合理性,同时对锚下螺旋钢筋的布置提出建议。
Based on the research project of mechanical analysis of stay cable anchorage zone of Minxian Bridge in Fuzhou, the space stress state of anchorage zone of main girder and tower anchorage zone was analyzed by using photoelastic model experiment. Under the action of stress, the stress concentration in anchorage zone of group anchorage and the general distribution rule of local stress prove the rationality of using flare tube in the construction of anchorage device, meanwhile put forward some suggestions for the arrangement of anchoring helix under anchorage.