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Title: Linear and nonlinear soil-structure interaction analysis of buildings and safety-related nuclear structures

Abstract

Soil-structure interaction (SSI) analysis is generally a required step in the calculation of seismic demands in nuclear structures, and is currently performed using linear methods in the frequency domain. Such methods should result in accurate predictions of response for low-intensity shaking, but their adequacy for extreme shaking that results in highly nonlinear soil, structure or foundation response is unproven. Nonlinear (time-domain) SSI analysis can be employed for these cases, but is rarely performed due to a lack of experience on the part of analysts, engineers and regulators. A nonlinear, time-domain SSI analysis procedure using a commercial finite-element code is described in the paper. It is benchmarked against the frequency-domain code, SASSI, for linear SSI analysis and low intensity earthquake shaking. Nonlinear analysis using the time-domain finite-element code, LS-DYNA, is described and results are compared with those from equivalent-linear analysis in SASSI for high intensity shaking. The equivalent-linear and nonlinear responses are significantly different. For intense shaking, the nonlinear effects, including gapping, sliding and uplift, are greatest in the immediate vicinity of the soil-structure boundary, and these cannot be captured using equivalent-linear techniques.

Authors:
; ;
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1464770
Report Number(s):
INL/JOU-15-35160
Journal ID: ISSN 0267-7261; PII: S0267726118300289
DOE Contract Number:  
DE-AC07-05ID14517
Resource Type:
Journal Article
Journal Name:
Soil Dynamics and Earthquake Engineering
Additional Journal Information:
Journal Volume: 107; Journal Issue: C; Journal ID: ISSN 0267-7261
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Soil-structure interaction; Nonlinear soil-structure interaction analysis; Earthquake engineering; Finite-element analysis

Citation Formats

Bolisetti, Chandrakanth, Whittaker, Andrew S., and Coleman, Justin L. Linear and nonlinear soil-structure interaction analysis of buildings and safety-related nuclear structures. United States: N. p., 2018. Web. doi:10.1016/j.soildyn.2018.01.026.
Bolisetti, Chandrakanth, Whittaker, Andrew S., & Coleman, Justin L. Linear and nonlinear soil-structure interaction analysis of buildings and safety-related nuclear structures. United States. doi:10.1016/j.soildyn.2018.01.026.
Bolisetti, Chandrakanth, Whittaker, Andrew S., and Coleman, Justin L. Sun . "Linear and nonlinear soil-structure interaction analysis of buildings and safety-related nuclear structures". United States. doi:10.1016/j.soildyn.2018.01.026.
@article{osti_1464770,
title = {Linear and nonlinear soil-structure interaction analysis of buildings and safety-related nuclear structures},
author = {Bolisetti, Chandrakanth and Whittaker, Andrew S. and Coleman, Justin L.},
abstractNote = {Soil-structure interaction (SSI) analysis is generally a required step in the calculation of seismic demands in nuclear structures, and is currently performed using linear methods in the frequency domain. Such methods should result in accurate predictions of response for low-intensity shaking, but their adequacy for extreme shaking that results in highly nonlinear soil, structure or foundation response is unproven. Nonlinear (time-domain) SSI analysis can be employed for these cases, but is rarely performed due to a lack of experience on the part of analysts, engineers and regulators. A nonlinear, time-domain SSI analysis procedure using a commercial finite-element code is described in the paper. It is benchmarked against the frequency-domain code, SASSI, for linear SSI analysis and low intensity earthquake shaking. Nonlinear analysis using the time-domain finite-element code, LS-DYNA, is described and results are compared with those from equivalent-linear analysis in SASSI for high intensity shaking. The equivalent-linear and nonlinear responses are significantly different. For intense shaking, the nonlinear effects, including gapping, sliding and uplift, are greatest in the immediate vicinity of the soil-structure boundary, and these cannot be captured using equivalent-linear techniques.},
doi = {10.1016/j.soildyn.2018.01.026},
journal = {Soil Dynamics and Earthquake Engineering},
issn = {0267-7261},
number = C,
volume = 107,
place = {United States},
year = {2018},
month = {4}
}