Experimental study of interface performance between calcareous sand and steel pile with different surface roughness and temperatures

Feng，Wei Qiang1,2; Zhang，Tian Yu1; Li，Yu Xiao1; Xu，Dong Sheng3

2024-01-15

10.1016/j.oceaneng.2023.116469

Ocean Engineering   影响因子和分区

0029-8018

The shear characteristics of calcareous sand, a typical deposit in the South China Sea, could significantly influence the safety and stability of marine structures. Previous studies showed that many factors, such as temperature and surface roughness, could affect the mobilized shear strength between the calcareous sand and steel surface. Therefore, studies on the shear behaviors of the steel-sand interface under various thermal conditions are necessary. In this study, a new multifunctional sediment shear system has been developed and employed to investigate the shear performance. For this purpose, steel plates with different surface roughness were tested under various normal stress values, shear displacement rates and temperatures. Shear strength and deformation were analyzed using test data to reveal the relationships between several factors and the shear strength of the steel-sand interface. Results from test demonstrate that the interfacial shear strength on rough steel interfaces will be 1.45–3.15 times higher than that on the smooth steel interface. Besides, the shear strength of the interface rises significantly with the roughness of the steel plate. The peak friction angle increases rapidly at the start and then tends to stabilize with the increase of normalized roughness. The interfacial shear strength could be enhanced in low-temperature environments but would reduce in high-temperature environments, e.g. the energy pile, particularly under low normal stress. The shear displacement rate also has a positive effect on the interface shear strength for most cases in this study. Finally, a new nonlinear function is proposed to describe the peak friction angle ratio of foundation interface to consider the effect of temperature and shear displacement rate reasonably.

Calcareous sand Interface shear test Steel plate Surface roughness Temperature effect

SCI ; EI

英语

第一

ENGINEERING

2-s2.0-85179881817

Scopus

1.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China
2.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,China
3.School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan,122 Luoshi Rd.,430070,China

Feng，Wei Qiang,Zhang，Tian Yu,Li，Yu Xiao,et al. Experimental study of interface performance between calcareous sand and steel pile with different surface roughness and temperatures[J]. Ocean Engineering,2024,292.

Feng，Wei Qiang,Zhang，Tian Yu,Li，Yu Xiao,&Xu，Dong Sheng.(2024).Experimental study of interface performance between calcareous sand and steel pile with different surface roughness and temperatures.Ocean Engineering,292.

Feng，Wei Qiang,et al."Experimental study of interface performance between calcareous sand and steel pile with different surface roughness and temperatures".Ocean Engineering 292(2024).