计算力学学报Issue(1)：89-93,5.DOI:10.7511/jslx201501015
偶应力理论下拉力型锚固体的受力特性
Stress characteristics of tensile-type anchor based on couple stress theory
摘要
Abstract
The stress characteristics and influencing factors of anchor are the important basis of design.It directly affects on anchoring effect.The traditional continuum theory does not consider the influence of strain gradient.Bend curvature was introduced into couple stress which considers the effect on the de-formation characteristics of the bending.The finite element calculation model for plane strain problem was built up based on couple stress theory.For tensile-type anchor,shear stress in anchorage interface and the axial force distribution along the anchor and couple stress scale effect were studied.The influence of confining pressure and elasticity modulus on anchorage force was analyzed.The results of couple stress theory are compared with that of typical elasticity theory.The results show that the shear stress near anchorage interface in couple stress theory is smaller than that in traditional theory,especially at the peak of shear stress.The shear stress of interface is enhancing with the increase of the elastic modulus of the geotechnical.The anchorage force enhances with the increase of confining pressure.The couple stress scale effect is obvious.关键词
拉力型锚固体/偶应力/有限元法/有效围压/尺度效应Key words
tensile-type anchor/couple stress/finite element method/effective pressure/scale effect分类
建筑与水利引用本文复制引用
张敦福,吴延峰,王卫东,朱维申,张波..偶应力理论下拉力型锚固体的受力特性[J].计算力学学报,2015,(1):89-93,5.基金项目
国家自然科学基金(51279095,41072234,51379114) （51279095,41072234,51379114）
山东省自然科学基金(ZR2010EM032)资助项目 （ZR2010EM032）
