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An improved iterative technique for inelastic time history analysis of single degree of freedom (SDOF) elasto-plastic system

An improved iterative technique for inelastic time history analysis of single degree of freedom... It is observed that only the primary local mechanism that is formed in an earthquake can be differentiated by the pushover analysis and it may not comprise other shortcomings that is produced when the dynamic attributes of the structure change after the development of the principal mode mechanism. However, the pushover analysis can be implemented with other assessment systems if higher mode effects are significant. Hence an effort is made to understand the spread of the plasticity in elasto plastic model taking account of this advantage. Initially, the Newmark-β strategy for linear system frameworks is extended to nonlinear frameworks by utilizing the Newton–Raphson procedure by addressing the nonlinear state of motions. A novel user-friendly algorithm is then formulated in LabVIEW software for the same. The LabVIEW program shows, that the nonlinear inelastic time-history responses predicted by the proposed program matches well with those given by the mathematical problem taken for study. Furthermore, a small-scale steel frame prototype model is prepared for testing purpose to evaluate the validation of the developed algorithm. The results of the experimental analysis show that the nonlinear iterative algorithm in LabVIEW software offers an accurate plastic deformation study of the structure. Adding to this, the bilinear isotropic hardening model is used to get plastic deformation results in ANSYS 17.0 using finite element method for experimental validation. The findings indicate that formulating appropriate algorithm in LabVIEW software enables to understand the accurate behavior of elasto plastic model analytically and experimentally. The study also highlights that more practical analysis techniques can be developed in LabVIEW software for understanding the behavior of the structures both in near-fault and far-fault earthquakes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

An improved iterative technique for inelastic time history analysis of single degree of freedom (SDOF) elasto-plastic system

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References (30)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-022-00243-5
Publisher site
See Article on Publisher Site

Abstract

It is observed that only the primary local mechanism that is formed in an earthquake can be differentiated by the pushover analysis and it may not comprise other shortcomings that is produced when the dynamic attributes of the structure change after the development of the principal mode mechanism. However, the pushover analysis can be implemented with other assessment systems if higher mode effects are significant. Hence an effort is made to understand the spread of the plasticity in elasto plastic model taking account of this advantage. Initially, the Newmark-β strategy for linear system frameworks is extended to nonlinear frameworks by utilizing the Newton–Raphson procedure by addressing the nonlinear state of motions. A novel user-friendly algorithm is then formulated in LabVIEW software for the same. The LabVIEW program shows, that the nonlinear inelastic time-history responses predicted by the proposed program matches well with those given by the mathematical problem taken for study. Furthermore, a small-scale steel frame prototype model is prepared for testing purpose to evaluate the validation of the developed algorithm. The results of the experimental analysis show that the nonlinear iterative algorithm in LabVIEW software offers an accurate plastic deformation study of the structure. Adding to this, the bilinear isotropic hardening model is used to get plastic deformation results in ANSYS 17.0 using finite element method for experimental validation. The findings indicate that formulating appropriate algorithm in LabVIEW software enables to understand the accurate behavior of elasto plastic model analytically and experimentally. The study also highlights that more practical analysis techniques can be developed in LabVIEW software for understanding the behavior of the structures both in near-fault and far-fault earthquakes.

Journal

Journal of Building Pathology and RehabilitationSpringer Journals

Published: Dec 1, 2022

Keywords: Elasto-plastic system; Newmark β iterative technique; Time-history analysis; LabVIEW software; ANSYS 17.0

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