scholarly journals Anisotropic surface roughness and shear behaviors of rough-walled plaster joints under constant normal load and constant normal stiffness conditions

2020 ◽  
Vol 12 (2) ◽  
pp. 338-352 ◽  
Author(s):  
Richeng Liu ◽  
Sha Lou ◽  
Xiaojing Li ◽  
Guansheng Han ◽  
Yujing Jiang
Keyword(s):  
Surface Roughness ◽  
Normal Load ◽  
Normal Stiffness ◽  
Anisotropic Surface ◽  
Constant Normal Stiffness ◽  
Constant Normal Load ◽  
Constant Normal Stiffness Conditions ◽  
Shear Behaviors

scholarly journals The mechanisms underlying long-term shaft resistance enhancement of energy pile in clays

2020 ◽  
Author(s):  
Saeed Yazdani ◽  
Sam Helwany ◽  
Guney Olgun
Keyword(s):  
Normal Load ◽  
Comprehensive Analysis ◽  
Normal Stresses ◽  
Lateral Stress ◽  
Energy Pile ◽  
Shaft Resistance ◽  
Energy Piles ◽  
Constant Normal Stiffness ◽  
Constant Normal Load

Although there are several studies indicating that heating increases the long-term shaft resistance of energy piles, the mechanisms by which heating causes this increase have not been adequately evaluated yet. This article aims to perform comprehensive analysis and discussion to assess the important factors contributing to this increase by integrating the findings from three recently published papers studying the thermo-mechanical behavior of clay and clay-pile interface. In these three studies, reconstituted kaolin clay was used, and cyclic and monotonic heat ranging between 24° C and 34°C were applied to the clay and interface. The interface was sheared under two stiffness boundary conditions; Constant Normal Stiffness (CNS) and Constant Normal Load (CNL), where the normal stresses varied between 100 kPa and 300 kPa. The analysis performed in this article reveals that the increase in strength of interface under CNL condition is primarily attributed to clay stiffening at interface. However, the increase in shaft resistance under CNS condition is primarily attributed to the heating-induced increase of effective lateral stress, although clay stiffening at interface also partially contributes to the total increase of shaft resistance.

Laboratory Investigation on Shear Behaviors of Bolt–Grout Interface Subjected to Constant Normal Stiffness

2019 ◽  
Vol 53 (3) ◽  
pp. 1333-1347 ◽  
Author(s):  
Chuanqing Zhang ◽  
Guojian Cui ◽  
Liang Deng ◽  
Hui Zhou ◽  
Jingjing Lu ◽  
...  
Keyword(s):  
Laboratory Investigation ◽  
Normal Stiffness ◽  
Constant Normal Stiffness ◽  
Shear Behaviors
Sign in / Sign up

Export Citation Format

Share Document