Comparison Between Newmark Time History Analysis and Finite Element Method for Estimating Seismically Induced Slope Displacement

DOI

10.2991/978-94-6463-104-3_16How to use a DOI?

Keywords

Seismic stability; Newmark; Displacement

Abstract

Estimating the seismically induced slope displacement is important in assessing the stability and relative deformation of slopes during earthquakes. The Newmark time history analysis (also known as Newmark displacement analysis) bridges the gap between the simplified pseudo-static method and complex stress-deformation analysis such as finite element (FE) analysis. However, the Newmark time history analysis may result in smaller dynamic deformation estimates. There is a lack of guidance on if the same deformation performance criterion should be applied to all methods. The study is divided into three parts: First, a two-dimensional stability analysis of the study slope was carried out for static and pseudo-static loading conditions per the relevant standard guidelines. Slope deformation was estimated for the pseudo-static loading condition using the simplified, empirical Bray and Macedo’s (2019) method for horizontal vibrations and shallow crustal earthquakes. Then, Newmark displacement of the slope along its most probable failure surface was estimated for selected earthquake time histories using the SLAMMER code built into the Slide2 software. Both coupled/decoupled acceleration time history methods were carried out. In the final part, finite element analysis was conducted for the same slope using the same earthquake time histories. Comparison of slope displacements at the crest from these three methods show that seismically induced displacements estimated using the Newmark time history analysis can be smaller than those from the FE analysis. Recommendations for building case study pools and developing method-dependent performance criteria are also included.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Mahir Badanagki
AU  - Feng Li
AU  - Christian Armstrong
PY  - 2023
DA  - 2023/03/01
TI  - Comparison Between Newmark Time History Analysis and Finite Element Method for Estimating Seismically Induced Slope Displacement
BT  - Proceedings of the TMIC 2022 Slope Stability Conference (TMIC 2022)
PB  - Atlantis Press
SP  - 171
EP  - 178
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-104-3_16
DO  - 10.2991/978-94-6463-104-3_16
ID  - Badanagki2023
ER  -