Resiliency of steel and composite structures

Abstract

This paper is divided into two parts. The first part addresses the resiliency and sustainability of steel and composite structures from a fundamental standpoint, and it is intended as an introduction to the other six papers that form part of this issue related to resiliency of steel structural systems in seismic areas. The paper posits the idea that resiliency is a characteristic that embodies sustainability rather than the traditional opposite point of view. The second part of the paper is divided into two sections, with the first section describing a number of retrofit technologies with recentering characteristics that have been developed for small, seismically deficient buildings in developing countries. The second section describes an innovative connection between circular concrete filled tubes and conventional beams with reduced flange sections consisting of steel and shape memory alloy bars and end plates. The connection has partial restraint behavior and strong recentering properties. This connection is used to demonstrate that some creative thinking can lead to innovative ways of addressing issues related to robustness, resiliency and sustainability of steel structures.

Keywords

steel structures / resiliency / sustainability / recentering systems / shape memory alloys

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Acknowledgements

While the opinions expressed herein are solely those of the senior author, many people have contributed over the years to the development of the concepts described in the second part of this paper. The work and contributions of my colleague Dr. Reginald DesRoches (Georgia Tech) and the many students that we advised and co-advised over the years, including Dr. Masahiro Kurata (Kyotou.), Dr. Matt Speicher (NIST), Dr. Walter (C.S) Yang (Georgia Tech), and Dr. Jong-Hwan Hu (Incheon National University), are gratefully acknowledged. The financial support of the Georgia Institute of Technology and the Virginia Polytechnic Institute and State University (Virginia Tech) was instrumental in making the work described herein possible.

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2016 Higher Education Press and Springer-Verlag Berlin Heidelberg