半圆型防波堤波浪力分布及稳定性分析

发布时间：2018-07-02 12:10

本文选题：半圆型防波堤 + 波浪力　；参考：《河北大学》2014年硕士论文

【摘要】：半圆型防波堤是一种新型防护性建筑。由于半圆型堤的曲面为圆弧形，所以当有巨大的海浪作用时，其产生的越浪量使堤身受到的波浪力大小有效改变，且指向圆心，同时，地基应力小且分布均匀。半圆型构件堤身断面不仅造价低，，外形美观，施工工序少，而且方便施工，非常适合条件恶劣的外海地区。这些优点促进了对半圆型防波堤水动力特性及波浪力计算方法的深入研究。首先，为了研究半圆型防波堤上波浪力分布规律，基于波浪水槽物理模型试验，寻求适合于此类型防波堤的波浪力计算公式，对作用于堤身的波浪压力试验数据进行分析，得到作用在防波堤上的水平力、竖向力和堤底的浮托力分布特性；针对试验结果计算分析，提出了适用于半圆型防波堤波浪力计算公式的修正方法。其次，由于作用在防波堤身的波浪力之间、波浪力矩之间具有高相关性，因此采用考虑相关变量的可靠性分析方法，确定该半圆型结构物的可靠指标、失效概率，以及各荷载的分项系数的建议值。最后提出半圆型防波堤的抗滑移、抗倾覆破坏的设计表达式。
[Abstract]:Semi-circular breakwater is a new type of protective building. Because the curved surface of the semi-circular embankment is circular arc, when there is a huge wave action, the wave surpassing force of the embankment body is changed effectively, and it points to the center of the circle. At the same time, the stress of the foundation is small and the distribution is uniform. The section of semi-circular member embankment is not only low in cost, beautiful in appearance, less in construction procedure, but also convenient for construction, so it is very suitable for offshore areas with harsh conditions. These advantages promote the further study of hydrodynamic characteristics and wave force calculation method of semi-circular breakwater. Firstly, in order to study the law of wave force distribution on semi-circular breakwater, based on the wave flume physical model test, the wave force calculation formula suitable for this type breakwater is obtained, and the wave pressure test data acting on the embankment body are analyzed. The horizontal and vertical forces acting on the breakwater and the distribution characteristics of the floating support force at the bottom of the breakwater are obtained, and a modified method for calculating the wave force of the semi-circular breakwater is put forward according to the calculation and analysis of the test results. Secondly, because of the high correlation between wave moment and wave force, the reliability index and failure probability of the semi-circular structure are determined by using the reliability analysis method considering the relevant variables. And the recommended values of the partial coefficients of each load. Finally, the design expressions of anti-slip and anti-overturning failure of semi-circular breakwater are presented.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.2

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