波浪荷载作用下深插式大直径圆柱壳结构的解析方法及实验

大直径圆柱壳结构是港口及近海工程中的一种新型结构，其力学机理、破坏形态、作用荷载以及计算方法等均亟待研究．基于散体结构力学理论与极限平衡条件，引用基床系数法推导了波浪荷载与结构位移关系的一种解析求解方法，由此可直接确定大圆柱壳结构的破坏形态，并计算出作用在其上的土压力，同时又重新定义了深插式与浅插式大圆柱壳结构的判别标准、最后通过大比尺模型试验，验证了本解析方法是可行有效的。

Analytic Method and Experiment of the Deeply Embedded Large-Diameter Cylinder Shell Structure Under Wave Loads

The large-diameter cylinder shell is a new-type structure, which has been applied to the harbor and offshore engineering, especially on the silt seashore and soft clay regions. It is necessary to study on its working mechanism, failure mode, load cases and calculated method.An analytic method of the relationship between the wave loads and the structure displacement is presented based on the granular media mechanics, the conditions of ultimate equilibrium and the modulus of the foundation. The failure mode and soil resistance on the embedded cylinder shell can be determined and calculated directly. A new criterion of the large cylinder shell, which discriminates the deep embedded cylinder from the shallow embedded cylinder, is defined. The results from the proposed method is compared with the large-scale model test data. Satisfactory agreement is found between the measured and the calculated ultimate lateral load and between the calculated and the measured displacement at test loads.