United States Department of Transportation
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Static and Dynamic Experimental Evaluation of Precast Columns With Grouted Splice Sleeve Connectors
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2024-08-01
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Abstract:With the popularization of accelerated bridge construction (ABC), the utilization of splice sleeve connections has been researched to determine their performance using a variety of connection details and under several loading scenarios. However, fundamental research on the load distribution and load transfer mechanism within the sleeve region under the combination of compressive and shear loads are limited. Additionally, a few studies have conducted the dynamic analysis of the coupler (i.e. coupler, rebar and grout), but to date, no study can be found that assesses the connections in sequence with the encasing concrete to detail the load paths for the composite member, evaluates the dynamic behavior and failure modes of precast columns with connections at different locations columns under low-velocity impact loading, nor that determines non-visible damage within the post-impact sleeve. In this study, two groups of precast concrete specimens with grouted splice sleeve (GSS) connectors at different locations are tested. The two groups represent two typical connection details for bridge piers to footings: one with the sleeve in the top of the footing and one in with the coupler at the base of the column. This study is divided into two major parts: static and dynamic investigations. This study not only provides novel and in-depth insights into theoretical research on the mechanism of precast concrete construction utilizing a GSS system, but also contributes much-needed data of impact test of the precast columns and novel insights into residual bond strength analysis of the post-impact GSS connectors.
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[PDF-4.28 MB]
