Ultimate bearing capacity of circular footing with 6-DOF due to combined loading
1.College of Engineering, Ocean University of China, Qingdao, Shandong 266100, China; 2.Key Laboratory of Ocean Engineering of Shandong Province, Qingdao, Shandong 266100, China
Abstract：Based on the plastic limit equilibrium theory of soil, the ultimate bearing capacity of circular footing with 6 degrees of freedom(DOF) was analyzed by finite element analysis software of Abaqus. The results show that the vertical loading has remarkable effect on the shape and amplitude of the failure envelope of seabed under combined loading. The failure envelope of circular footing in three-dimensional loa-ding space is more round than that in two-dimensional loading space, and the slope of failure envelope has no sharp change.The horizontal loading and moment loading have strong impact on the shape and amplitude of failure envelope, while the torque loading has slight impact on the failure envelope in three-dimensional loading space. A critical formula was proposed to estimate the effect of loading components of combined loading on the failure envelope of seabed.
2013, Vol. 34 
