深水桥梁双承台组合基础波浪力的参数影响性研究

发布时间：2018-04-16 19:31

本文选题：桥梁工程 + 组合基础　；参考：《桥梁建设》2014年01期

【摘要】：为研究组合基础中各构件波浪力的变化规律,以某深水桥梁采用的双承台组合基础为原型,采用特征函数展开匹配法计算承台波浪力,结合Morison公式计算桩柱波浪力,分析承台尺寸、浸深和桩柱位置等参数的变化对基础波浪力的影响。结果表明:下承台半径对上承台波浪力(力矩)影响较大,其高度的影响与上、下承台半径比有关;上承台尺寸主要影响下承台水平波浪力和波浪力矩;随上承台浸深的增加,下承台波浪力(力矩)曲线出现多个极值;中部桩柱波浪力随上承台浸深增加呈先增后减趋势;边部桩柱波浪力随桩心角的增大呈先增后减趋势、随桩心距的增大而增加,承台的存在引起波浪力偏向和相位差。
[Abstract]:In order to study the variation law of wave force of each component in composite foundation, the wave force of pile column is calculated by using characteristic function expansion matching method and Morison formula, taking the double cap composite foundation of a deep water bridge as the prototype.The influence of pile cap size, dipping depth and pile column position on the foundation wave force is analyzed.The results show that the radius of the bottom cap has a great influence on the wave force (torque) of the upper cap, and the influence of its height is related to the ratio of the radius of the upper and lower cap, the dimension of the upper cap mainly affects the horizontal wave force and the wave moment of the lower cap, and with the increase of the immersion depth of the upper cap,The wave force (torque) curve of the bottom pile cap has several extreme values, the wave force of the middle pile column increases first and then decreases with the increase of the dip depth of the pile cap, and the wave force of the side pile column increases first and then decreases with the increase of the pile core angle, and increases with the increase of the pile core distance.The existence of cap causes wave force deviation and phase difference.
【作者单位】：上海大学土木工程系;中铁大桥局集团有限公司;
【基金】：国家自然科学基金(11072143) 浙江省教育厅科研项目(Y201223039)~~
【分类号】：U443.1

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