ABSTRACT

A vibration test was performed on large-diameter steel cylinders that comprise the wall surrounding the artificial islands of the Hong Kong–Zhuhai–Macau Bridge. The dynamic strain and stress endured by the following components, auxiliary cells of three different thicknesses, large and small mortises, and steel pipe piles, were analyzed. The results showed that the steel section at the monitored points of the auxiliary cell, mortise, and steel pipe pile did not yield during vibration. The extreme values of dynamic stress and strain of the auxiliary cell appeared near the bottom and increased with increasing auxiliary cell thickness. Meanwhile, the extreme values of dynamic stress and strain of mortises and steel pipe piles mostly appeared at the top. Our research results can provide a reference for the rationality of the auxiliary cell structure design and its safety evaluation.

摘要

对构成港珠澳大桥人工岛围墙的大直径钢筒进行了振动试验。分析了三种不同厚度的辅助单元、大小榫眼、钢管桩等构件所承受的动态应变和应力。结果表明，辅助单元、榫眼和钢管桩监测点的钢截面在振动过程中没有屈服。辅助电池的动态应力和应变的极值出现在底部附近，并且随着辅助电池厚度的增加而增加。同时，榫眼和钢管桩的动应力应变极值大多出现在顶部。