Influence of Lap Splices on the Deformation Capacity of RC Walls. I: Database Assembly, Recent Experimental Data, and Findings for Model Development
Publication: Journal of Structural Engineering
Volume 143, Issue 12
Abstract
Recent postearthquake missions have shown that reinforced concrete (RC) wall buildings can experience critical damage owing to lap splices, which led to a recent surge in experimental tests of walls with such constructional details. Most of the 16 wall tests described in the literature thus far were carried out in the last six years. This paper presents a database with these wall tests, including the description of a new test on a wall with lap splices and a corresponding reference wall with continuous reinforcement. They complement the existing tests by investigating a spliced member with a shear span ratio smaller than two, which is the smallest among them. The objective of this database is to collect information not just on the force capacity but mainly on the deformation capacity of lap splices in reinforced concrete walls. It is shown that (1) well-confined lap splices relocate the plastic hinge above the lap splice, (2) lap splices with adequate lengths but insufficiently confined attain the peak force but their deformation capacity is significantly reduced, and (3) short and not well-confined lap splices fail before reaching the strength capacity. The analysis of the test results, which are used in the companion paper for the finite element analysis of walls with lap splices, indicates in particular that the confining reinforcement ratio and the ratio of shear span to lap splice length influence the lap splice strain capacity.
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Acknowledgments
The financial support by the Stiftung zur Förderung der Denkmalpflege to the project “Erbebenverhalten von bestehenden Stahlbetongebäuden mit dünnen Wänden” and by the Swiss Federal Roads Office (FEDRO) to the project number AGB 2015/002, under which the present study was partly carried out, is acknowledged.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 12 • December 2017
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©2017 American Society of Civil Engineers.
History
Received: Oct 3, 2015
Accepted: Mar 22, 2017
Published online: Sep 19, 2017
Published in print: Dec 1, 2017
Discussion open until: Feb 19, 2018
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