中文摘要：

新型双拱钢管结构闸门是空间管桁结构在水利闸门中的应用,首次应用于曹娥江大闸中作为挡潮泄洪闸门。首先进行了缩尺模型的反复加载试验研究,通过分析试验数据研究了闸门的受力特征,发现闸门主要受力构件为主拱、反拱和弦杆,它们以承受轴力为主,且沿跨度受力均匀,材料利用率较高,所以闸门设计是合理的。进一步对闸门的滞回性能进行了研究,发现闸门有较好的塑性变形能力和延性,通过滞回环的骨架曲线研究了结构承载力特性,分别为弹性阶段,局部塑性阶段,破坏阶段。发现部分节点较小的局部屈服对于整体结构承载性能影响不大。最后对闸门关键节点的疲劳状况进行了分析,对部分节点进行了改进。

英文摘要：

A new double-arch lock is used as tidal barrage and sluice to bear bilateral loadings for the Cao＇e River Dam. A scale-model cyclic test was conducted to study the mechanical property of the lock. The test data shows that the load-bearing members mainly bear axial force and the value of axial-force varies a little along the span, indicating an appropriate design, and that the lock has good capacities of plasticity and ductility. The load-deflection envelope curve of the model indicates that the bearing capacity has three stages： the elastic stage, the local plastic stage and the failure stage. A little local plastic strain will not have significant effect on the bearing capacity of the structure. In addition, test on the fatigue performance of the key joints has been conducted and those elements that fail to meet the fatigue requirement have been redesigned.