Publication Abstract

Proceedings - Sixth International Conference & Exhibition on Piling and Deep Foundations, 1996, Bombay, India, (DFI)

Safe Load of a Single Pile in Earthquake Loading
Shamsher Prakash, Somnath Bandyopadhyay

Estimation of vertical load carrying capacity of a single vertical pile under earthquake loading is an important task of a design engineer. Lateral vibration of vertical pile is highly influenced by the magnitude of vertical load. Several load reversal, during earthquake loading introduce gap between pile soil interface which reduces its load carrying capacity and increases lateral motion. This paper presents a simple time domain numerical scheme to estimate the lateral pile response, considering the loss of contact of pile at pile soil interface, during impact and earthquake loading. The motion of the pile is limited in the vertical plane. Time domain has been discretised into small intervals. The non-linearity of soil properties has been taken into account by discretised Winklers model with Wolfes frequency independent mass spring dashpot coefficient for geometric damping. Suitable software has been developed which keeps track of the load reversal point of each element.

 article #405; publication #35 (IC-1996)