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postgraduate thesis: Insights on rate effects on the dynamic pullout resistance of anchors of flexible barriers
Title | Insights on rate effects on the dynamic pullout resistance of anchors of flexible barriers |
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Authors | |
Advisors | |
Issue Date | 2022 |
Publisher | The University of Hong Kong (Pokfulam, Hong Kong) |
Citation | Xiong, D. [熊大可]. (2022). Insights on rate effects on the dynamic pullout resistance of anchors of flexible barriers. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. |
Abstract | Existing research on the design of flexible barriers to arrest geohazards mainly
focuses on the optimisation of the superstructure. Little attention has been given to
the optimization of the foundation anchors used to transmit dynamic impact
loading to the ground. In fact, design guidelines for foundation anchors for flexible
barriers are based on quasi-static pullout theories even though field evidence
suggests that the dynamic response of an anchor is fundamentally different. In this
study, a new analytical model is proposed to predict the peak pullout resistance for
anchors subjected to dynamic loading in saturated sand. A novel experimental
apparatus was developed to evaluate the proposed analytical model. Dynamic
effects are profound in saturated sand and less so in dry sand. Rate strengthening
at the soil-anchor interface is governed by pore pressure change from dilation and
soil damping. The proposed model is shown to give close predictions of the
measured peak dynamic pullout resistance, which is up to three times those under
quasi-static conditions. Findings imply that rate strengthening changes the critical
failure mechanism of a foundation anchor from the soil-anchor interface for quasistatic loading to the potential rupturing of the steel tendon for dynamic loading. |
Degree | Master of Philosophy |
Subject | Anchorage (Structural engineering) Foundations Materials - Dynamic testing |
Dept/Program | Civil Engineering |
Persistent Identifier | http://hdl.handle.net/10722/322792 |
DC Field | Value | Language |
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dc.contributor.advisor | Choi, CE | - |
dc.contributor.advisor | Nunes Lourenco, SD | - |
dc.contributor.author | Xiong, Dake | - |
dc.contributor.author | 熊大可 | - |
dc.date.accessioned | 2022-11-18T10:40:32Z | - |
dc.date.available | 2022-11-18T10:40:32Z | - |
dc.date.issued | 2022 | - |
dc.identifier.citation | Xiong, D. [熊大可]. (2022). Insights on rate effects on the dynamic pullout resistance of anchors of flexible barriers. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. | - |
dc.identifier.uri | http://hdl.handle.net/10722/322792 | - |
dc.description.abstract | Existing research on the design of flexible barriers to arrest geohazards mainly focuses on the optimisation of the superstructure. Little attention has been given to the optimization of the foundation anchors used to transmit dynamic impact loading to the ground. In fact, design guidelines for foundation anchors for flexible barriers are based on quasi-static pullout theories even though field evidence suggests that the dynamic response of an anchor is fundamentally different. In this study, a new analytical model is proposed to predict the peak pullout resistance for anchors subjected to dynamic loading in saturated sand. A novel experimental apparatus was developed to evaluate the proposed analytical model. Dynamic effects are profound in saturated sand and less so in dry sand. Rate strengthening at the soil-anchor interface is governed by pore pressure change from dilation and soil damping. The proposed model is shown to give close predictions of the measured peak dynamic pullout resistance, which is up to three times those under quasi-static conditions. Findings imply that rate strengthening changes the critical failure mechanism of a foundation anchor from the soil-anchor interface for quasistatic loading to the potential rupturing of the steel tendon for dynamic loading. | - |
dc.language | eng | - |
dc.publisher | The University of Hong Kong (Pokfulam, Hong Kong) | - |
dc.relation.ispartof | HKU Theses Online (HKUTO) | - |
dc.rights | The author retains all proprietary rights, (such as patent rights) and the right to use in future works. | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject.lcsh | Anchorage (Structural engineering) | - |
dc.subject.lcsh | Foundations | - |
dc.subject.lcsh | Materials - Dynamic testing | - |
dc.title | Insights on rate effects on the dynamic pullout resistance of anchors of flexible barriers | - |
dc.type | PG_Thesis | - |
dc.description.thesisname | Master of Philosophy | - |
dc.description.thesislevel | Master | - |
dc.description.thesisdiscipline | Civil Engineering | - |
dc.description.nature | published_or_final_version | - |
dc.date.hkucongregation | 2022 | - |
dc.identifier.mmsid | 991044609097403414 | - |