|
| Stress characteristics of tensile-type anchor based on couple stress theory |
| Received:July 27, 2013 Revised:November 17, 2013 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201501015 |
| KeyWord:tensile-type anchor couple stress finite element method effective pressure scale effect |
| Author | Institution |
| 张敦福 |
山东大学 土建与水利学院, 济南 |
| 吴延峰 |
山东大学 土建与水利学院, 济南 |
| 王卫东 |
山东大学 土建与水利学院, 济南 |
| 朱维申 |
山东大学 土建与水利学院, 济南 |
| 张波 |
山东大学 土建与水利学院, 济南 |
|
| Hits: 1889 |
| Download times: 1665 |
| 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 deformation 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. |