Journal of Seismology and Earthquake Engineering

Journal of Seismology and Earthquake Engineering

The Relation Between Foundation Embedment and Peak Horizontal Input Acceleration: The Case of Strip Foundation with Partial Contact to Surrounding Medium

Document Type : Geotechnical Earthquake Engineering

Authors
Hossein Jahankhah
Pouran Fallahzadeh
International Institute of Earthquake Engineering and Seismology (IIEES)
10.48303/jsee.2015.240709
Abstract
In the field of soil-structure interaction (SSI), kinematic interaction (KI) can potentially be a source of notable influence on dynamic response. Such influence takes place through alternation in free field motion (FFM) and results in new foundation input motions (FIM). In this paper, first, the effect of KI on horizontal input motion for the case of single rigid strip embedded foundation with incomplete contact between sidewall and nearby soil under vertical propagation of shear waves is investigated. Then, it is discussed that how this input-change would be reflected in peak horizontal input acceleration (PHIA). Results for different embedment depths and various soil-wall contact lengths are depicted. In this research, numerical analysis was conducted by ABAQUS finite element software. It is shown that the effects of kinematic interaction are significant for high frequencies of excitation. Besides, it is illustrated that foundation shape and its contact area to surrounding soil alter the PHIA usually conservatively with some exceptions in the case of zero contact lengths.
Keywords
Kinematic interaction
Strip embedded foundation
Incomplete side-wall contact
Peak acceleration
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Journal of Seismology and Earthquake Engineering
Volume 17, Issue 2 - Serial Number 2
Spring 2015
Pages 103-113

  • Receive Date 31 August 2016
  • Accept Date 26 December 2020
  • Publish Date 01 April 2015