Behavior of axially loaded drilled shaft foundations with symmetric voids outside and inside the caging

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dc.contributor.author Abishdid, Caesar
dc.contributor.author Hajali, Masood
dc.date.accessioned 2016-10-19T13:00:50Z
dc.date.available 2016-10-19T13:00:50Z
dc.date.copyright 2014 en_US
dc.date.issued 2016-10-19
dc.identifier.issn 1937-5247 en_US
dc.identifier.uri http://hdl.handle.net/10725/4638
dc.description.abstract Drilled shaft foundations usually carry very high design loads, and often serve as a single load-carrying unit. These conditions have created a need for a high-level of quality assurance during and after construction process. During the construction process, different types of anomalies such as necking, soft-bottom gap at the base, voids and soil intrusions can occur. Anomalies throughout the length can significantly reduce the axial load capacity of the drilled shaft. This paper studies the effect of voids inside and outside the reinforcement cage on the strength and structural capacity of drilled shafts. The objective of this research is to quantify the extent of loss in axial strength and stiffness of drilled shafts due to presence of three different types of symmetric voids throughout their lengths; also, to evaluate the potential for buckling of longitudinal bars within the various types of voids. To complete these objectives, fifteen large-scale drilled shaft samples were built and tested using a hydraulic actuator at the Florida International University’s (FIU) Titan America Structures and Construction Testing (TASCT) laboratory. During the static load test, load-displacement curves were recorded by the data acquisition system (MegaDAC). Results show that the presence of symmetric voids outside the rebar cage (void Type C) that occupy 40% of the cross sectional area of the drilled shafts cause 27% reduction in the axial capacity, while the symmetric voids that penetrate inside the core (void Type B) cause 47% reduction in the axial capacity. The findings indicate that the voids Type B decrease the capacity and stiffness of drilled shafts more than other types due to the resulting inadequate confinement of the concrete and reinforcement. en_US
dc.language.iso en en_US
dc.title Behavior of axially loaded drilled shaft foundations with symmetric voids outside and inside the caging en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOE en_US
dc.author.idnumber 199431340 en_US
dc.author.department Civil Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal DFI Journal en_US
dc.article.pages 3-12 en_US
dc.identifier.doi http://dx.doi.org/10.1179/dfi.2012.006 en_US
dc.identifier.ctation Hajali, M., & Abishdid, C. (2012). Behavior of axially loaded drilled shaft foundations with symmetric voids outside and inside the caging. DFI Journal-The Journal of the Deep Foundations Institute, 6(2), 3-12. en_US
dc.author.email caesar.abishdid@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://www.tandfonline.com/doi/abs/10.1179/dfi.2012.006 en_US
dc.orcid.id https://orcid.org/0000-0002-7114-4795

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