Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

Pile foundations for machines and structures are often subjected to horizontal or vertical harmonic vibrations. However, in some situations, piles also experience torsional harmonic vibrations. While there are some research work on tapered piles imposed to horizontal or vertical harmonic vibrations, the response of such piles till now is lacking. In this study, the elasto-dynamic theory has been used to derive the governing differential equation on a tapered pile experiencing torsional harmonic vibration. In this approach, the pile is assumed the pile has circular cross sectional area and consists of elastic material. It is further assumed that there is sufficient connection between the pile and the soil, so that the slippage cannot occur at the pile-soil contact surface. By using the developed method, the effect on the pile dynamic torsion amplitudes of the taper angle has been investigated. It has been found that the twist angle of the pile decreases with increasing the taper angle while the length and volume of the pile is kept constant. This reveals that the use of tapered piles leads to a better performance for foundations compared with the case of using straight-sided piles of the same length and volume.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

COinS
 
May 24th, 12:00 AM May 29th, 12:00 AM

Investigation of Non-Uniform Pile Behaviour Under Torsional Harmonic Vibration

San Diego, California

Pile foundations for machines and structures are often subjected to horizontal or vertical harmonic vibrations. However, in some situations, piles also experience torsional harmonic vibrations. While there are some research work on tapered piles imposed to horizontal or vertical harmonic vibrations, the response of such piles till now is lacking. In this study, the elasto-dynamic theory has been used to derive the governing differential equation on a tapered pile experiencing torsional harmonic vibration. In this approach, the pile is assumed the pile has circular cross sectional area and consists of elastic material. It is further assumed that there is sufficient connection between the pile and the soil, so that the slippage cannot occur at the pile-soil contact surface. By using the developed method, the effect on the pile dynamic torsion amplitudes of the taper angle has been investigated. It has been found that the twist angle of the pile decreases with increasing the taper angle while the length and volume of the pile is kept constant. This reveals that the use of tapered piles leads to a better performance for foundations compared with the case of using straight-sided piles of the same length and volume.