dc.contributor.advisor |
Orense, R |
en |
dc.contributor.author |
Hong, Yuan |
en |
dc.date.accessioned |
2015-11-26T19:55:38Z |
en |
dc.date.issued |
2015 |
en |
dc.identifier.citation |
2015 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/27566 |
en |
dc.description |
Full text is available to authenticated members of The University of Auckland only. |
en |
dc.description.abstract |
Earthquake-induced liquefaction phenomenon has long been recognized as one of the most serious problems in geotechnical earthquake engineering and has been studied through many case histories. It is common sense to realize that large earthquakes always directly damage buildings and injure people. However, buildings are sometimes strong enough to survive from the earthquake, but then suffer from other earthquake-induced geotechnical hazards, such as liquefaction-induced settlement and tilt. This research aims to investigate the impact of liquefaction on the settlement of buildings by numerically simulating and analyzing the effects of various parameters inducing settlements. The finite element effective stress analysis software FLIP, developed in Kyoto University, was used for this purpose. Firstly, the model adopted was validated through the results of centrifuge tests available in the literature. All significant material properties, including static parameters and dynamic properties, and a variety of foundation structures and selected input motions were analyzed using FLIP and the related results were compared with those in the literature. Next, various parameters which were deemed to contribute to the magnitude of total and differential settlements were analyzed, with emphasis on the mechanism in inducing the damage of buildings. The numerical results pointed out that taller buildings experience stronger rocking and generate larger vertical stress than shorter buildings and, with the increase in building height, the liquefaction-induced building settlement and foundation rotation worsened. Moreover, it was found that both vertical settlement and foundation rotation decrease with the increase of building width. Several empirical formulas were regressed to describe the relationships of the most significant parameters and their effects on the settlements of buildings. Then, ground improvement techniques were considered as possible mitigation techniques. Traditional ground improvement measures were reviewed and their merits and shortcomings were summarized. Finally, the effects of liquefaction on the settlements of a set of buildings were investigated and then a methodology of minimizing the impact of liquefaction to adjacent buildings by connecting/coupling their foundations with beams was proposed and verified numerically. Results indicate that the proposed coupled foundation system would result in better performance than the traditional techniques during large earthquake events. |
en |
dc.publisher |
ResearchSpace@Auckland |
en |
dc.relation.ispartof |
Masters Thesis - University of Auckland |
en |
dc.relation.isreferencedby |
UoA99264837809302091 |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights |
Restricted Item. Available to authenticated members of The University of Auckland. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.rights.uri |
http://creativecommons.org/licenses/by-nc-sa/3.0/nz/ |
en |
dc.title |
Numerical Investigation of Liquefaction-induced Building Settlements and Their Mitigation through Coupled Foundation Systems |
en |
dc.type |
Thesis |
en |
thesis.degree.discipline |
Civil and Environmental Engineering |
en |
thesis.degree.grantor |
The University of Auckland |
en |
thesis.degree.level |
Masters |
en |
dc.rights.holder |
Copyright: The Author |
en |
pubs.elements-id |
507259 |
en |
pubs.record-created-at-source-date |
2015-11-27 |
en |
dc.identifier.wikidata |
Q112909216 |
|