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 Luwen Qie,Xiang Zhang,Xuelian Jiang and Yinan Qin.Research on Partial Coefficients for Design of Quarter-circular Caisson Breakwater[J].Journal of Marine Science and Application,2013,(1):65-71.[doi:10.1007/s11804-013-1176-7]
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Research on Partial Coefficients for Design of Quarter-circular Caisson Breakwater


Research on Partial Coefficients for Design of Quarter-circular Caisson Breakwater
Luwen Qie Xiang Zhang Xuelian Jiang and Yinan Qin
Luwen Qie Xiang Zhang Xuelian Jiang and Yinan Qin
1. College of Civil Engineering, Hebei University, Baoding 071002, China 2. Tianjin Key Laboratory of Soft Soil Characteristics & Engineering Environment, Tianjin Institute of Urban Construction, Tianjin 300384, China
quarter-circular caisson breakwater (QCB) wave force modified Goda formula reliability index partial coefficient
The quarter-circular caisson breakwater (QCB) is a new type of breakwater, and it can be applied in deepwater. The stability of QCB under wave force action can be enhanced, and the rubble mound engineering can be less than that of semi-circular breakwaters in deepwater. In order to study the wave force distribution acting on the QCB, to find wave force formula for this type of breakwater, firstly in this paper, the distribution characteristics of the horizontal force, the downward vertical force and the uplift force on the breakwater were gotten based on physical model wave flume experiments and on the analysis of the wave pressure experimental data. Based on a series of physical model tests acted by irregular waves, a kind of calculation method, which was modified by Goda formula, was proposed to carry out the wave force on the QCB. Secondly, the reliability method with correlated variables was adopted to analyze the QCB, considering the high correlation between wave forces or moments. Utilizing the observed wave data in engineering field, the reliability index and failure probability of QCB were obtained. Finally, a factor Q=0.9 is given to modify the zero pressure height above SWL of QCB, and wave force partial coefficient 1.34 to the design expressions of QCB for anti-sliding, as well as 1.67 for anti-overturning, were presented.


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Supported by the Natural Science Foundation of Hebei Province (Grant No. E2012201057), the Scientific and Technological Projects of Hebei Province (Grant No. 2009056), and the Natural Science Foundation of Tianjin (Grant No. 10JCYBJC03700).
Last Update: 2013-03-14