东海大桥桥梁桩柱承台水动力模型试验研究——第二部分:作用于群桩及承台上的波流力

Experimental studies on hydrodynamic loads on piles and slab of Donghai bridge——Part Ⅱ: hydrodynamic forces on pile array and slab in wave-current combinations

在本系列研究第一部分单桩试验的基础上,对不规则波与均匀流共同作用于斜群桩的水动力特征进行了试验研究。由于群桩效应使得各组成桩的受力不均匀,通过试验研究,分析了群桩中各组成桩及群桩总体折减系数随KC数的变化、受水深及流速的影响。在频域内采用相关函数法进行了谱分析,得到波面谱与波力谱的相关关系。初步讨论了作用在斜群桩和承台结构上的波流力。

An experimental investigation on hydrodynamic loads on an inclined pile array of a bridge pier induced by irregular wave and current is reported in the paper. The forces and moments on individual pile are not uniform because of the effects of group piles. The effects of KC number, water depth and current velocity on the coefficient of group piles are discussed. The wave spectra and wave force spectra are obtained by the spectral analysis for the measured time series. It turns out that the effect of the slab on the hydrodynamic loads on piles is significant.