Modelling the Cone Penetration Test in sand using Cavity Expansion and Arbitrary Lagrangian Eulerian Finite Element Methods

Tolooiyan, Ali; Gavin, Kenneth

doi:10.1016/j.compgeo.2011.02.012

Cited by 80 publications

(31 citation statements)

References 19 publications

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“…The sand deposit at the site is heavily overconsolidated as a result of the glacial history and recent excavations. Detailed descriptions of the ground conditions at the site have been reported by Tolooiyan & Gavin (2011) and Doherty et al (2012). Sand replacement tests suggest that the in situ relative density is close to 100% and the unit weight of the soil is 20 kN/m 3 .…”

Section: Site Descriptionmentioning

confidence: 99%

Field validation of fibre Bragg grating sensors for measuring strain on driven steel piles

Doherty

Igoe

Murphy

et al. 2015

Géotechnique Letters

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In recent years, fibre Bragg grating (FBG) sensors have emerged as a relatively new strain sensing technology for civil engineering applications. This paper presents a field trial to assess the feasibility of using FBG sensor arrays to measure strain in driven steel piles. Two FBG arrays were installed in grooves within the wall of an open-ended steel pile such that the finished profile was completely flush with the pile shaft. The pile was then driven into a dense sand deposit using an impact hammer to provide the required installation energy. The FBG gauges were monitored throughout driving in conjunction with accelerometers to quantify the scale of the hammer impacts. The FBG sensors were subjected to hammer blows that yielded pile accelerations between 500 g and 1400 g during installation. The fibre optic sensors were measured throughout driving, where they were observed to respond to the hammer impacts, showing a rapid increase in strain and a return to their initial values between hammer strikes. After installation, a lateral load test was performed with independent load measuring devices. Excellent agreement was observed between the measured moments and those inferred from the FBG strain output. The output of this trial demonstrates that FBG strain sensors are a viable means of measuring load transfer in foundation systems and are suitably robust to withstand high pile driving accelerations.

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Section: Site Descriptionmentioning

confidence: 99%

Field validation of fibre Bragg grating sensors for measuring strain on driven steel piles

Doherty

Igoe

Murphy

et al. 2015

Géotechnique Letters

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“…Particle size distribution analyses performed on samples taken from depths ranging from 0. , a constant volume friction angle of 37 and a peak friction angle which ranges from 54 to approximately 40° over the depth of interest in this paper [22,24]. The specific gravity of particles was 2.69.…”

Section: Field Testmentioning

confidence: 99%

An investigation of the changes in the natural frequency of a pile affected by scour

Prendergast

Hester

Gavin

et al. 2013

Journal of Sound and Vibration

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Publication informationJournal of Sound and Vibration, 332 (25): 6685-6702Publisher Elsevier Item record/more information http://hdl.handle.net/10197/6581 Publisher's statementThis is the author's version of a work that was accepted for publication in Journal of Sound and Vibration. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Sound and Vibration (VOL 332, ISSUE 25, (2013) AbstractScour around bridge foundations is one of the leading causes of bridge failure. Up until recently, the monitoring of this phenomenon was primarily based around using underwater instrumentation to monitor the progression of scour holes as they develop around foundation systems. Vibration-based damage detection techniques have been used to detect damage in bridge beams. The application of these vibration based methods to the detection of scour has come to the fore in research in recent years. This paper examines the effect that scour has on the frequency response of a driven pile foundation system, similar to those used to support road and rail bridges. The effect of scour on the vibration characteristics of the pile is examined using laboratory and field testing. It is clear that there is a very clear reduction in the natural frequency of the pile as the severity of scour increases. It is shown that by combining state-of-the-art geotechnical techniques with relatively simple finite element modelling approaches, it is possible to accurately predict the natural frequency of the pile for a given scour depth. Therefore, the paper proposes a method that would allow the estimation of scour depth for a given observed pile frequency. Scour Monitoring: The accurate assessment and monitoring of existing structures to progressive scour has come to the fore of research in recent years [7,8]. A myriad of current technology aims to detect the existence and severity of scour around the foundation systems of existing bridge structures. Most of these technologies comprise underwater instrumentation that aim to monitor the evolution of scour holes over time. A brief summary of available instrumentation is given herein. The use of float-out devices [9] and Tethered Buried Switches [10] positioned in the soil near a bridge pier can provide a simple method of scour monitoring. These devices float out when the scour depth reaches their position and are programmed to send a remote signal to provide a warning. However, they require reinstallation upon floating out, which is a distinct disadvantage. Time Domain Reflectometry (TDR) aims to detect changes in the dielectric permittivity constants between materials that would occur at a water-sediment interface and thus has been used to detect scour [10 -12]. Devices using this method work very well at detecting the depth of scour i...

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“…The proposed analysis complements ongoing research into the evaluation of the static and dynamic re sponse of wind turbine foundation solutions a t the site. Thus far, thorough examinations of the soil properties have been undertaken (Gavin et a i, 2009;Gavin and O 'Kelly, 2007;Gavin and Lehane, 2007), and a site specific HS model used in 2D PLAXIS FE analysis had previously been evaluated and cahbrated by Tolooiyan and Gavin (2011). A summ ary of the site conditions can be found in Doherty et al (2012) and a brief overview of the test site is provided in the current section.…”

Section: Test S Itementioning

confidence: 99%

“…Figure 6.1: Soil testing results for dense sand at Blessington test site (Tolooiyan and Gavin, 2011).…”

Section: Test S Itementioning

confidence: 99%

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Fragility analysis of steel and concrete wind turbine towers

Quilligan

O’Connor

Pakrashi

2012

Engineering Structures

139

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Modelling the Cone Penetration Test in sand using Cavity Expansion and Arbitrary Lagrangian Eulerian Finite Element Methods

Cited by 80 publications

References 19 publications

Field validation of fibre Bragg grating sensors for measuring strain on driven steel piles

Field validation of fibre Bragg grating sensors for measuring strain on driven steel piles

An investigation of the changes in the natural frequency of a pile affected by scour

Fragility analysis of steel and concrete wind turbine towers

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