Influence of wave direction on uplift force of sloping high piled wharf

Headnote

ABSTRACT

Chen, J.; Yan, Y.X.; Chen, G.P., and Tan, H.M., 2016. Influence of wave direction on uplift force of sloping high piled wharf. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., and McCarroll, R.J. (eds.), Proceedings of the 14th International Coastal Symposium (Sydney, Australia). Journal of Coastal Research, Special Issue, No. 75, pp. 1442 - 1446. Coconut Creek (Florida), ISSN 0749-0208.

Based on the experiment carried out in this study, the effect of incoming wave direction on uplift force acting upon high piled wharf deck has been analyzed. The main influencing factors have been taken into account, which include the wave incident angle, wave types, period, wave height, height of wharf deck.For the regular and irregular wave, the testing results showed that the oblique wave incoming angle was the main influencing factor on uplift force in both with and without current circumstances. The current direction has effect on the decreasing trend of total uplift force. Moreover, the simplified formula on uplift force under oblique wave without current was proposed. The comparison between the observed and calculated results illustrated that the accuracy of the proposed formula can mainly satisfy the requirements in practice.

ADDITIONAL INDEX WORDS: oblique wave, wave uplift force, wave direction, lab test.

(ProQuest: ... denotes formulae omitted.)

INTRODUCTION

The ocean waves have great threats on the safety of the coastal structures, such as high piled wharf, artificial island, bay bridge, etc. The decks of coastal structures can be destroyed under the wave uplift force in some extreme situations. In order to decrease the wave uplift force acting on structure decks, the levels of decks for the offshore structures are usually designed above the mean sea level. However, for the onshore structures, such as high piled wharf and landing stage, the deck levels are often below the mean water level, so the influences of the wave uplift force cannot be ignored in the design of coastal structures. The main methods on wave forces acting on coastal structures are theoretical analysis, numerical modeling and laborotory experiments (Bozorgnia et al., 2013; Huang and Xiao, 2009; Kataoka et al., 2013; Wang et al., 2011). EI.Ghamry (1963) conducted the experiment of uplift force on offshore and onshore high piled wharf, the process of wave impact on structure has...