Connections between Steel and Concrete
Connections between Steel and Concrete

Author: Rolf Eligehausen

Publisher: ibidem-Verlag / ibidem Press

Published: 2012-02-27

Total Pages: 1430

ISBN-13: 383825807X

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Anchorage by fasteners and composite structures of steel and concrete have seen dramatic progress in research, technology and application over the past decades. The understanding of the fundamental principles underlying both disciplines has significantly improved. Concurrently, there has been rapid growth in the development of sophisticated new products and the establishment of international directives and codes to ensure their safe and economical use in a wide range of engineered structures. Although they deal with very similar problems, the two disciplines have developed independently from each other. To optimize the use of composite structures and fastenings to concrete, however, it is necessary to have knowledge of both: the local behavior of the fastening system and the global behavior of the structure. It became apparent that a forum offering the opportunity to expand and to exchange experience in the field of connecting steel and concrete would benefit all involved. Furthermore this forum would aid in the rapid dissemination of new ideas, technologies and solutions as well as explore new areas of research.This book forms the Proceedings of the 2 Symposium on “Connections between Steel and Concrete”. As the 1 Symposium in 2001 it brought together leading experts from all facets of the research, design, construction and anchor manufacturing community from around the world. Their lectures covered the topics:- test methods- behavior and design- dynamic loading: shock, earthquake, fatigue- durability- exceptional applications, strenghtening and structures- related topicsIn total 129 papers are gathered in these 2 volumes.

Head and Bond Contributions to Anchorage of a Headed Reinforcing Bar
Head and Bond Contributions to Anchorage of a Headed Reinforcing Bar

Author: Andrew M. Blau

Publisher:

Published: 2010

Total Pages: 188

ISBN-13:

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Headed reinforcing bars are becoming more popular in the construction industry; however, there is relatively little known about the interaction of the head and bond in resisting loads. As such, the ACI 318-08 (the 2008 version being the current version) code equation governing headed reinforcing bars appears to be a gross generalization of the capacity of a headed bar. The purpose of this project was to study the contributions of the head and bond as they change with varying bond lengths, clear covers, and head bearing areas to determine if a better model can be developed to represent a headed bar. Twelve headed bar specimens were cast, each one with a unique combination of bone length, clear cover, and head bearing area, and loaded until failure. Two failure modes were observed: bar yielding and side blowout. The loads resisted by the head and bond throughout the loading of each specimen were analyzed for trends. It was determined that headed bars follow one of two patterns: head-dominated and bond-dominated, and is dependent on bond length. As such, different models should be used for the capacity of each pattern. The specimen capacities were compared to models proposed by others, and the current ACI 381-08 code equation. The ACI 318-08 code equation was found to be a good fit with a minor modification for the bond-dominated bars. It was determined to not be possible to develop a model for head-dominated bars from this test program and that additional testing must be conducted.