Lu, Y., Marshall, A. and Hajirasouliha, I. A Simplified Nonlinear Sway-Rocking Model for Evaluation of Seismic Response of Structures on Shallow Foundations. Soil Dynamics and Earthquake Engineering. ISSN 0267-7261
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 mobilized. 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 utilized 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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Soil-structure interaction; Simplified model; Nonlinear analysis; Soil non-homogeneity; Coupled sway-rocking response |
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 01 Dec 2015 15:28 |
Last Modified: | 04 Dec 2017 01:38 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.soildyn.2015.11.002 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:92314 |