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Strength of reinforced concrete pier caps-experimental validation of strut-and-tie method
Indu Geevar,
Published in American Concrete Institute
2019
Volume: 116
   
Issue: 1
Pages: 261 - 274
Abstract
The strut-and-tie method (STM) is commonly used to design reinforced concrete (RC) pier caps, where the traditional methods of shear and flexural design cannot be used due to nonlinear strain distribution. This paper presents experimental studies on scaleddown pier cap specimens subject to four concentrated loads, to study the influence of various parameters and the applicability of STM. The STM prescribed by ACI 318 and AASHTO are found to give reasonably conservative results only when the beneficial effect of triaxial confinement near the bearing node is invoked; otherwise, the predictions are overly conservative. Variations in bearing plate size, distributed reinforcement, and loading eccentricity did not have much influence on the load capacity, but distributed reinforcement was seen to be beneficial in limiting crack widths. The formation of the assumed STM is validated using strain measurements in concrete and steel, and it is observed that this develops only after significant cracking. Copyright © 2019, American Concrete Institute. All rights reserved.
About the journal
JournalACI Structural Journal
PublisherAmerican Concrete Institute
ISSN08893241
Open AccessNo
Concepts (13)
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    Bearings (structural)
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    Piers
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    Shearing
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    Struts
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    DISTURBED REGIONS
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    Experimental validations
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    HAMMERHEAD
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    LOADING ECCENTRICITY
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    PIER CAP
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    REINFORCED CONCRETE PIER
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    STRUT AND TIE METHOD
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    STRUT-AND-TIE
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    Reinforced concrete