Overview

In this book, three potential solutions to the issue of steel congestion in reinforced concrete (RC) structures are researched. The first method examines RC mixed with steel fibers. The use of steel fibers instead of stirrups results in the reduction of reinforcing congestion in a manner which is both effective in reducing the effects of congestion and practical to implement. In the second method, reinforcing congestion in RC or prestressed concrete (PC) structures is effectively reduced by the use of self-consolidating concrete (SCC). In the final method, reinforcing congestion is effectively reduced by the use of headed bars instead of traditional hooked bars.In evaluating these three approaches, varied types of concrete and testing methods were used. Shear testing was conducted using a lightweight concrete mix, and flexural testing of prestressed SCC beams was conducted. Seismic testing of headed bars in RC beam-column connections was also conducted. The test results were compared with the ACI 318 provisions and with existing modeling equations proposed by several researchers. This book proposes new models which correlate better with the test results, and examines the effective solutions for diverse conditions offered by several variations and combinations of such methods. The study in this book will provide the basis for additional research since the guidelines and codes regarding the alleviation of reinforcing congestion are shown to be based upon previously limited data.

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9781443852364

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Dr Thomas Kang is an Associate Professor of Architectural Engineering at Seoul National University, and a licensed P.E. in California. Prior to that, he was an Assistant Professor at the University of Oklahoma, Norman. He received his PhD from UCLA and his BS from Seoul National University. Dr Kang received the Wason Medal for Most Meritorious Paper as Lead Author from ACI in 2009, and the PTI Fellow Award and Kenneth B. Bondy Award for the Most Meritorious Technical Paper as Lead Author from PTI in 2012 and 2013, respectively.Dr Woosuk Kim is an Assistant Professor of Architectural Engineering at Kumoh National Institute of Technology. He received his PhD from the University of Oklahoma, Norman, and his BS from Kumoh National Institute of Technology. Dr Kim received the Larry Canton Scholarship from the University of Oklahoma in 2010.

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