Dynamic soil–foundation–structure interaction for bunds in Goa

Abstract

This paper provides a concise review of Dynamic (Seismic) Soil–Foundation–Structure Interaction (DSFSI) presenting the main methods of DSFSI which are an important and integral part of such studies. The paper spotlights the areas which can use DSFSI including traditional structures like bunds and new structures like pile, pile raft, and mat foundations. Traditional Goan Saraswat Bunds are ancient coconut tree-lined road and flood control embankments found all over Goa which have lasted for thousands of years through storms and earthquakes. Today, as the concept of sustainable construction practices gains growing recognition, they deserved to be studied. The behavior of the tree on top of a bund during earthquakes can be studied using Single-Degree-of-Freedom and vibration damping by pendulum. This paper also presents an equation for the interaction of coconut tree roots as soil springs for their role in damping of the Seismic waves in the bunds. Modeling the bund in MIDAS-GTS-NX showed marginal reduction in acceleration and displacement by the presence of coconut trees.