ULTIMATE BEARING CAPACITY ANALYSIS OF GROUND AGAINST INCLINED LOAD BY TAKING ACCOUNT OF NONLINEAR PROPERTY OF SHEAR STRENGTH
ULTIMATE BEARING CAPACITY ANALYSIS OF GROUND AGAINST INCLINED LOAD BY TAKING ACCOUNT OF NONLINEAR PROPERTY OF SHEAR STRENGTH
复制标题
考虑剪切强度非线性特性的地面对倾斜荷载的极限承载能力分析
DOI：
10.21660/2013.10.3323
复制
发表时间：
2013
影响因子：
0.7
通讯作者：
K. Kaneda
中科院分区：
文献类型：
--
作者：
L. Dun;S. Ohtsuka;T. Hoshina;K. Isobe;K. Kaneda
在基础承载力评估中，日本建筑学会（AIJ）提出的承载力公式在日本被广泛用于建筑基础设计。但该公式仅限于基础形状简单、地面平坦、材料性能均匀等简单条件。硬塑性有限元法（RPFEM）虽然可以解决这一复杂问题，但在承载力评估中并未考虑尺寸效应。本研究通过引入抗围应力的非线性抗剪强度特性，新发展了RPFEM，并基于丰浦砂抗剪角度的变化，提出了抛物线屈服函数的刚性塑性本构方程。所开发的方法和承载力公式（通过经验方法建立）为各种基础尺寸提供了相同的结果，显示出对更广泛的基础尺寸的良好估计。
In the assessment of bearing capacity of footing, the bearing capacity formula proposed by The Architectural Institute of Japan (AIJ) has been widely used in Japan for the design of building foundation. However, this formula is limited to simple conditions like simple footing shape, flat ground and uniform material property. Although the rigid plastic finite element method (RPFEM) can solve this complex problem, it has not taken into account the size effect in assessment of bearing capacity. This study newly develops the RPFEM by introducing the nonlinear shear strength property against the confining stress and proposes the rigid plastic constitutive equation of parabolic yield function, basing on the change in the angle of shear resistance of Toyoura sand. The developed method and the bearing capacity formula (established by empirical approach) provided identical results for various footing sizes showing good estimation for wider range of footing size.