Robust design of braced excavations using multiobjective optimization-focusing on prevention of damage to adjacent buildings

Lei Wang, Zhe Luo, Sara Khoshnevisan, C. Hsein Juang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This paper presents a new geotechnical design methodology, referred to herein as robust geotechnical design (RGD), and its application in the braced excavation design in clays. The RGD approach is aimed at optimally selecting the design parameters so that the system response (e.g., the damage probability of the adjacent building caused by excavation) is insensitive to, or robust against, uncertainty in statistics of noise factors. In this paper, the uncertainty in the estimated statistics of noise factors is evaluated using the bootstrapping method, and the variation in the probability of damage is evaluated using the point-estimated method integrated with first-order reliability method. The RGD is realized through a multiobjective optimization, in which all the requirements such as safety, robustness, and cost are explicitly considered. A design example of braced excavation is used to demonstrate the effectiveness and significance of the RGD approach.

Original languageEnglish
Title of host publicationGeo-Congress 2014 Technical Papers
Subtitle of host publicationGeo-Characterization and Modeling for Sustainability - Proceedings of the 2014 Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages3178-3187
Number of pages10
Edition234 GSP
ISBN (Print)9780784413272
DOIs
StatePublished - 2014
Event2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014 - Atlanta, GA, United States
Duration: 23 Feb 201426 Feb 2014

Publication series

NameGeotechnical Special Publication
Number234 GSP
ISSN (Print)0895-0563

Conference

Conference2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014
Country/TerritoryUnited States
CityAtlanta, GA
Period23/02/1426/02/14

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