A numerical study of the composite behavior of permanent and temporary shaft liners subjected to strong ground shaking

K. C. Ellison, P. Kumar, A. Richmond, S. Chen, L. Maher, Y. M.A. Hashash, M. Walker, S. Toloui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The seismic performance of a proposed 37-meter-diameter by 52-meter-deep permanent shaft installed within a “temporary” diaphragm wall-supported excavation for a soft-over-stiff soil siteis evaluated via 3D finite element analyses. To this end, results are presented from two sensitivity analyses performed as part of the Central Bayside System Improvement Project in San Francisco, California, USA. The variables considered include the stiffness of the diaphragm wall (to account for possible degradation over time) and the effect of tying (or not tying) the permanent structure to the diaphragm wall (e.g. to resist hydrostatic uplift). The findings indicate there can be significant effects from each of these variables on the demands in the permanent shaft, which are typically not apparent from simplified closed-form solutions. It is concluded that consideration of site-specific conditions is important to the evaluation of composite shaft behaviorand that ignoring the presence of the diaphragm wall is not necessarily conservative.

Original languageEnglish (US)
Title of host publicationEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
EditorsFrancesco Silvestri, Nicola Moraci
PublisherCRC Press/Balkema
Pages2258-2265
Number of pages8
ISBN (Print)9780367143282
StatePublished - 2019
Event7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 - Rome, Italy
Duration: Jan 17 2019Jan 20 2019

Publication series

NameEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019

Conference

Conference7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019
CountryItaly
CityRome
Period1/17/191/20/19

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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    Ellison, K. C., Kumar, P., Richmond, A., Chen, S., Maher, L., Hashash, Y. M. A., Walker, M., & Toloui, S. (2019). A numerical study of the composite behavior of permanent and temporary shaft liners subjected to strong ground shaking. In F. Silvestri, & N. Moraci (Eds.), Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019 (pp. 2258-2265). (Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019). CRC Press/Balkema.