摘要
主缆锚固区是自锚式悬索桥的关键局部结构,其构造和传力机理复杂。为探讨某自锚式钢结构悬索桥主缆锚固区的力学性能,对主缆锚固区进行缩尺模型试验研究,并建立足尺有限元模型进一步对比分析主缆锚固区的受力性能。研究表明:缩尺模型试验结果与足尺有限元模拟结果吻合较好,缩尺模型试验考虑了锚固区主要的边界约束条件,试验测试结果精度较高;1.0倍主缆索力作用下,主缆锚固区整体变形不明显,板件没有发生局部屈曲;1.5倍主缆索力作用下,外侧腹板部分板件发生局部屈曲,但锚固区大部分板件仍处于弹性受力状态;主缆锚固区应力分布合理,无明显应力集中区域,主缆锚固区构造合理。
Anchorage zone for main cable is the key member in a self-anchored steel suspension bridge. The construction measure and force transfer mechanism are extremely complex. In order to investigate mechanical behavior of anchorage zone for main cable in a self-anchored steel suspension bridge, the reduced scale model experiment of anchorage zone for main cable was carried out. The full-scale finite model was also established to compare mechanical behavior of anchorage zone with experimental resuits. The study shows that the reduced scale model experimental results are well agreed with the data by the full-scale finite model. The main boundary constraint conditions of anchorage zone are considered reasonably in the reduced scale model test, and the experimental data have high accuracy. When the main cable force is equal to the design value, the overall deformation of anchorage zone for main cable is not obvious, and local buckling in plate is not developed. While the main cable force is 1.5 times of the design value, local buckling is generated in the outside web plate, but most plates in anchorage zone are still in elastic state. The stress distribution of anchorage zone for main cable is reasonable, and stress concentration is not evident. The construction measures for anchorage zone are feasible.
作者
韩雪
李海锋
HAN Xue;LI Haifeng(Xiamen Institute of Technology, Xiamen 361021, China;College of Civil Engineering, Huaqiao University, Xiamen 361021, China;Key Laboratory for Structure Engineering and Disaster Prevention of Fujian Province, Xiamen 361021, China)
出处
《低温建筑技术》
2017年第12期30-35,共6页
Low Temperature Architecture Technology
基金
国家自然科学基金项目(51408240)
泉州市科技计划项目(2015Z142)
关键词
自锚式悬索桥
锚固区
有限元模拟
self-anchored suspension bridge
anchorage zone
finite-element simulation
