Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/145052
Title: Effects of directionality and vertical component of ground motions on seismic slope displacements in Newmark sliding-block analysis
Authors: Du, Wenqi
Keywords: Science::Geology
Issue Date: 2018
Source: Du, W. (2018). Effects of directionality and vertical component of ground motions on seismic slope displacements in Newmark sliding-block analysis. Engineering Geology, 239, 13-21. doi:10.1016/j.enggeo.2018.03.012
Journal: Engineering Geology
Abstract: The Newmark sliding block model is widely used in the evaluation of seismic slope stability. When using this model, the horizontal acceleration is usually considered to act parallel to the slope (downslope), and the vertical component of ground motions is commonly ignored. This study investigates the effect of vertical accelerations on the results of sliding displacement, and quantitatively compares the difference of the displacement DN calculated from the original Newmark's approach with the displacement DHV calculated from a more realistic case (horizontal and vertical accelerations properly considered). For this purpose, 4136 ground motion recordings are selected from the NGA-West2 database, and >2000 hypothetic slopes are simulated with critical accelerations ac ranging from 0 to 0.8 g. Comparison of DHV and DH shows that the incorporation of vertical accelerations only slightly increases the displacement. Besides, the calculated DHV/DN ratios are generally in the range of 1 to 5, indicating that DN significantly underestimates the slope displacement due to the simplification of seismic excitations. The DHV/DN ratios generally increase as ac increases. Simple predictive models are proposed to quantify the correction factor KD (KD = DHV/DN). They can be easily used in seismic landslide hazard assessment to improve the performance of the original Newmark's approach.
URI: https://hdl.handle.net/10356/145052
ISSN: 0013-7952
DOI: 10.1016/j.enggeo.2018.03.012
Rights: © 2018 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ICRM Journal Articles

PublonsTM
Citations 20

10
Updated on Mar 5, 2021

Page view(s)

137
Updated on Jan 23, 2022

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.