Yang Lu
A simplified Nonlinear Sway-Rocking model for evaluation of seismic response of structures on shallow foundations
Lu, Yang; Marshall, Alec M.; Hajirasouliha, Iman
Authors
ALEC MARSHALL alec.marshall@nottingham.ac.uk
Professor of Geotechnical Engineering
Iman Hajirasouliha
Abstract
This paper presents a simplified Nonlinear Sway-Rocking model as a preliminary design tool for seismic soil-structure interaction analysis. The proposed model is intended to capture the nonlinear load-displacement response of shallow foundations during strong earthquake events where foundation bearing capacity is fully mobilised. Emphasis is given to heavily-loaded structures resting on a saturated clay half-space. The variation of soil stiffness and strength with depth, referred to as soil non-homogeneity, is considered in the model. Although independent springs are utilised for each of the swaying and rocking motions, coupling between these motions is taken into account by expressing the load-displacement relations as functions of the factor of safety against vertical bearing capacity failure (FSv) and the moment-to-shear ratio (M/H). The simplified model has been calibrated and validated against results from a series of static push-over and dynamic analyses performed using a more rigorous finite-difference numerical model. Despite some limitations of the current implementation, the concept of this model gives engineers more degrees of freedom in defining their own model components, providing a good balance between simplicity, flexibility and accuracy.
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 7, 2015 |
Online Publication Date | Dec 4, 2015 |
Publication Date | 2016-02 |
Deposit Date | Nov 7, 2016 |
Publicly Available Date | Nov 7, 2016 |
Journal | Soil Dynamics and Earthquake Engineering |
Print ISSN | 0267-7261 |
Electronic ISSN | 0267-7261 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 81 |
Pages | 14-26 |
DOI | https://doi.org/10.1016/j.soildyn.2015.11.002 |
Keywords | Soil-structure interaction; Simplified model; Nonlinear analysis; Soil non-homogeneity; Coupled sway-rocking response |
Public URL | https://nottingham-repository.worktribe.com/output/978484 |
Publisher URL | http://www.sciencedirect.com/science/article/pii/S0267726115002663 |
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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