柔性锚胫法向承力锚安装轨迹和承载性能分析  

Model analysis and performance of vertically loaded anchors with a bridle shank

作　　者：王忠涛[1] 王春乐 杨庆[1] 丛斌龙 WANG Zhong-tao;WANG Chun-le;YANG Qing;CONG Bin-long(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024~ China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室

出　　处：《岩土工程学报》2018年第9期1698-1705,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51639002,41772296)

摘　　要：针对具有柔性锚胫的Stevmanta法向承力锚的安装轨迹和承载性能进行研究。首先,通过机构分析提出了由拖曳力与锚板之间夹角确定锚胫形态的方法,然后将该方法引入塑性方法建立了可以考虑锚胫形态变化的数值计算方法。基于该数值方法,计算了法向承力锚在拖曳安装与系泊调节过程中的运动轨迹和承载力,研究其性能特点,并讨论了锚胫几何参数对锚性能的影响。研究发现：在拖曳嵌入的初始阶段,锚胫的形态改变能够使锚板发生显著旋转从而获得良好的下潜姿态;在拖曳嵌入与系泊调节过程中,锚胫最终都会达到稳定状态,形态不再发生变化;锚胫几何参数的变化对锚的运动轨迹、承载性能均有明显影响,实际工程中应权衡各方面性能进行合理取值。The performance of Stevmanta vertically loaded anchor with a bridle shank is studied. Through the mechanism analysis, the method for determining the bridle shank configuration is proposed. The numerical model is established using the plasticity approach to simulate the installation and mooring processes of Stevmanta anchor. Based on the results, the features of anchors and the influences of geometrical parameters are studied. It is found that the anchor rotation is significant at the initial stage of installation process because of the special shank configuration, and this is helpful for the anchor to get a good diving posture. During both the installation and mooring processes, the anchor will reach a stable state in which the shank configuration will not change. Moreover, the geometrical parameters should be determined by tradeoff while they have significant influences on the performance of anchors.

关 键 词：法向承力锚 柔性锚胫 塑性方法 运动轨迹 承载力 

分 类 号：TU47[建筑科学—结构工程]