巴东长江大桥索塔锚固区节段模型试验与空间应力分析

Anchorage Zone of Cable-stayed Tower in Badong Changjiang Highway Bridge: Model Test and Spatial Stress Analysis

斜拉桥主塔拉索锚固区是斜拉桥的关键部位 ,其受力十分复杂 ,一般的平面分析难以反映锚固区实际工作状况和应力分布 .文中介绍了巴东长江公路大桥索塔锚固区足尺节段模型试验的测试方案、内容和成果 ,并进行了空间有限元分析 ,结果表明试验和理论分析结果吻合程度较好 .此外 ,还得出了模型的开裂荷载。

The anchorage zone of cable-stayed tower is an important part of cable-stayed bridges, in which stress distribution is very complicated. General mechanical analysis is hard to reflect the actual working status and carrying capacity for the anchorage zone . The full scale segmental model test of the anchorage zone of Badong Changjiang Highway Bridge is described, including its procedure, items and results. Further more, spatial finite element analysis is carried out. A good agreement has been revealed based on the contrast analysis between the model test and spatial analysis. Some important conclusions are drawn such as cracking load, ultimate load and displacement of the model, etc.