Shaking Table Test of the Negative Skin Friction of a Single Pile Induced by Seismic Settlement of Model Soft Soil-Reference-Cited by-同舟云学术

Shaking Table Test of the Negative Skin Friction of a Single Pile Induced by Seismic Settlement of Model Soft Soil

Published:2023-03-11 Issue:6 Volume:13 Page:3588
ISSN:2076-3417
Container-title:Applied Sciences
language:en
Short-container-title:Applied Sciences

Author:

Li Ping¹²,Lin Mingyuan¹²,Liu Yingci¹²

Affiliation:

1. Institute of Disaster Prevention, Sanhe 065201, China

2. Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment, Sanhe 065201, China

Abstract

The negative skin friction (NSF) of pile foundations is one of the most important factors in triggering building subsidence. To study the mechanism and development of the NSF over time, four methods have been used: theoretical calculations, field tests, model tests, and numerical modeling. To address the difficulty of sampling prototype soft soils in model tests, this study uses a dynamic triaxial instrument to select a similar material ratio that can effectively simulate the dynamic properties of the prototype soft soil as a soft soil layer, and input sine waves with different frequencies and peak ground acceleration (PGA) for shaking table tests to investigate the effects of frequency and PGA on the development of the distribution of NSF and the location of the neutral point of the pile foundation. The test results show that the pile NSF is mainly distributed in the upper part of the pile under horizontal sine wave loading, increases rapidly from 0 to 5 s, and stabilizes after 5 s. Its magnitude is influenced by the sine wave frequency and PGA, and the effect of PGA on the NSF is more significant. In addition, the pile neutral point position shifts downwards with increasing sine wave frequency and PGA, but the downwards shift is not significant.

Funder

Science and Technology Innovation Program for Postgraduate students in IDP subsidized by Fundamental Research Funds for the Central Universities

Earthquake Science and Technology Star and Fire Program Project

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

Link

https://www.mdpi.com/2076-3417/13/6/3588/pdf

Reference27 articles.

1. Liu, H. (1986). Earthquake Damage of the Tangshan Earthquake, Seismological Press. (In Chinese).

2. The Mexico earthquake of September 19, 1985—Behavior of building foundations in Mexico City;Mendoza;Earthq. Spectra,1988

3. Jiang, X. (2009). Investigation and Research on Earthquake Damages of Foundations in Wenchuan Earthquake. [Master’s Thesis, Tongji University]. (In Chinese).

4. Endo, M.A., Minou, A., Kawasaki, I., and Shibata, T. (1969, January 29). Negative Skin Friction Acting on Steel Piles in Clay. Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering, Mexico City, Mexico.

5. Okabe, T. (1977, January 10–15). Large negative friction and friction-free pile methods. Proceedings of the 9th international Conference on Soil Mechanics and Foundation Engineering, Tokyo, Japan.