斜拉桥锚拉板受力特性及参数影响研究

Research on Mechanical Characteristics and Influence of Parameters on the Anchor of Cable-stayed Bridge

锚拉板式索梁锚固结构中,锚拉板局部区域和焊缝位置处存在明显的应力集中现象,易发生塑性破坏,导致锚固区承载能力下降。为改善锚拉板的受力性能,通过精细化有限元仿真及参数影响分析,明确了锚拉板结构的受力机理,提出了其合理构造形式和改进措施。研究结果表明,参数优化得到的局部构造明显改善了锚拉板的受力性能,有效降低了应力集中现象的发生概率。

In the cable-beam anchorage structure with tensile anchor plate of cable-stayed bridges,there is obvious stress concentration in the local area and the weld position of the anchor plate,which is prone to plastic failure and leads to the reduction of the bearing capacity of the anchorage zone. In order to improve the mechanical performance of the anchorage structure,this paper analyzes its force mechanism through the finite element simulation analysis,and proposes its reasonable structure and improvement measures through the parametric influence analysis. The results show that the local structure obtained by parameter optimization significantly improves the stress performance of the anchorage and effectively reduces the stress concentration phenomenon.