MARC 主機 00000nam a2200433Ki 4500
001 AAI10928173
005 20190503113355.5
006 m o u
007 cr mn||||a|a||
008 190503s2018 xx sbm 000 0 eng d
020 9780438384309
035 (MiAaPQ)AAI10928173
035 (MiAaPQ)colorado:15677
040 MiAaPQ|beng|cMiAaPQ|dNTU
100 1 Paramasivam, Balaji
245 10 Influence of Traditional and Innovative Liquefaction
Mitigation Strategies on the Performanc of Soil-structure
Systems, Considering Soil Heterogeneity
264 1 |c2018
300 1 online resource (427 pages)
336 text|btxt|2rdacontent
337 computer|bc|2rdamedia
338 online resource|bcr|2rdacarrier
500 Source: Dissertation Abstracts International, Volume: 80-
02(E), Section: B
500 Advisers: Shideh Dashti; Abbie B. Liel
502 Thesis (Ph.D.)--University of Colorado at Boulder, 2018
504 Includes bibliographical references
520 Liquefaction mitigation techniques are often used in the
field to alleviate liquefaction hazard to the built
environment. However, the current practice of designing
mitigation techniques ignores the presence of buildings,
and depends solely on satisfying the settlement criteria,
and constructability. This design practice is due to lack
of understanding of the influence of different mitigation
strategies on the performance of soil-foundation-structure
systems
520 In this dissertation, centrifuge experiments were designed
and conducted to investigate soil-mitigation-foundation-
structure systems, considering two potentially inelastic
structures (3- and 9-story) placed on a layered
liquefiable deposit (with and without a silt cap), with
three different mitigation strategies: 1) enhanced
drainage through prefabricated vertical drains (PVDs); 2)
shear reinforcement using in-ground structural walls
(SWs); and 3) enhanced drainage and damping, and shear
reinforcement provided by an in-ground gravel-rubber panel
wall system
520 The first set of test results show that PVDs and SWs
reduced total foundation settlement compared to the
unmitigated case. However, they amplified accelerations on
the foundations, which could increase flexural
deformations and P-Delta effects, with potentially adverse
effects on foundation tilt (particularly for the taller,
heavier, more deeply embedded, and weaker 9-story
structure). The presence of soil interlayering (due to a
silt cap) affected the overall response of unmitigated and
PVD-mitigated structures, particularly impacting
foundation tilt
520 Based on the insights gained from the tests with
traditional mitigation techniques, we designed and tested
a new mitigation strategy for shallow-founded structures:
an in-ground gravel-rubber panel wall (GR) system. This
system aims to reduce building settlements and tilts,
while isolating the structure from the larger acceleration
demands expected in mitigated ground. Test results showed
that the GRs could be beneficial, roughly satisfying
design objectives for the 3-story structure, but amplified
tilt on the 9-story structure. Therefore, additional
design considerations and shear reinforcement are required
in the panel walls to improve total system response
520 The results presented in this dissertation point to the
importance of considering the structure's dynamic and
geometric properties, force-deformation behavior, soil
interlayering, and the possible increase in shaking
intensity level due to different mitigation strategies,
when designing traditional or innovative techniques to
mitigate consequences of liquefaction
533 Electronic reproduction.|bAnn Arbor, Mich. :|cProQuest,
|d2019
538 Mode of access: World Wide Web
650 4 Civil engineering
655 7 Electronic books.|2local
690 0543
710 2 ProQuest Information and Learning Co
710 2 University of Colorado at Boulder.|bCivil, Environmental,
and Architectural Engineering
773 0 |tDissertation Abstracts International|g80-02B(E)
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/
advanced?query=10928173|zclick for full text (PQDT)
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