重力式方块码头的抗震动力性能分析

以抗震性能相对较差的带有卸荷板的重力式方块码头为研究对象,首先对其在静力荷载作用下的变形和等效应力及稳定性进行了初步分析,然后对其在规范拟静力地震作用下和基于动力时程的强震记录下的水平地震惯性力、水平和竖向变形、最大等效应力、抗滑移和抗倾覆稳定性进行了对比分析。结果表明强震作用下除了码头的抗倾覆和抗滑移验算外,对结构的水平残余变形和竖向沉降变形同样要给予密切的关注,按当前规范给出的标准进行抗震设计,罕遇地震下会存在一定的风险。

Seismic Dynamic Performance Analysis of Gravity Block Quay Wall

The earthquake resistance of the block quay wall was relatively weak and the residual deformation, the maximum of the equivalent stress and the sliding and overturning stability of the block quay wall under the static loading were firstly analyzed. Furthermore, the pseudo static method and the dynamic history analysis were respectively employed to derive the lateral seismic inertia force, the horizontal and vertical deformation, the maximum of equivalent stress, the stability against sliding and overturning. The results of analyses indicated that more attention have to be paid to the horizontal deformation and the settlement displacement when a rare earthquake occurs, besides the sliding and overturning stability. The block quay wall which was designed with the current standards and criteria will sustain some damage under strong ground motion.