An Analytical Method for Predicting the Pullout Behavior of Embedded Planar Reinforcements with the Consideration of the
- PDF / 1,905,374 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 80 Downloads / 196 Views
(2020) 6:35
TECHNICAL NOTE
An Analytical Method for Predicting the Pullout Behavior of Embedded Planar Reinforcements with the Consideration of the Residual Interfacial Shear Strength Fei‑fan Ren1,2 · Quan Liu1 · Guan Wang3 · Qi‑hua Zhao2 · Chao Xu1 Received: 24 February 2020 / Accepted: 19 July 2020 © Springer Nature Switzerland AG 2020
Abstract In this paper, an analytical method was proposed to predict the mechanical behavior of embedded planar reinforcements subjected to pullout loads, and a tri-linear shear slip model was employed in the analytical method to consider the residual shear strength at the reinforcement-soil interface. The overall process of the pullout behavior was characterized by five sequential stages. At each stage, closed-form solutions for the distribution of interface shear stress and axial stress along the reinforcement length were obtained as well as the pullout resistance-displacement relationship. On this basis, the analytical model was validated through a comparison with the results of three pullout tests. In conclusion, the pullout resistance-displacement curves and internal displacement distributions predicted by the method agree well with those obtained by the tests. Keywords Planar reinforcements · Pullout test · Analytical method · Effective embedment length · Shear slip model
Introduction Planar reinforcements, usually used in association with soil, are increasingly employed as reinforcing members to improve the stability of slopes, retaining walls and embankments [1–3]. There are many types of planar reinforcements, such * Qi‑hua Zhao [email protected] Fei‑fan Ren [email protected] Quan Liu [email protected] Guan Wang [email protected] Chao Xu [email protected] 1
Key Laboratory of Geotechnical and Underground Engineering (Ministry of Education), Department of Geotechnical Engineering, Tongji University, Shanghai, China
2
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China
3
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China
as geogrids, geotextiles, and geosynthetic straps. The friction resistance of the interface between the soil and reinforcement transfers the stress of the soil to the reinforcement as tensile forces, and a composite soil is produced with a higher equivalent shear strength than that provided from soil alone. The buried planar reinforcements embedded in the resistant zone are mainly subjected to pullout forces. Limit equilibrium methods, which assume that all the points along the reinforcements simultaneously reach the peak strength, are usually employed in conventional engineering designs, and the interface direct shear test is mostly adopted to determine interface mechanical parameters. However, this assumption does not conform to actual engineering situations, and it has been widely proven that the shear stresses that develop along the reinforcements are not uniform [4–6]. Pullout tests, which
Data Loading...
