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Infrastructures 2018, 3(3), 26; https://doi.org/10.3390/infrastructures3030026

A Modified Catenary Model with Application to the Analysis and Design of Retrofit Cables for Progressive Collapse

Department of Civil and Environmental Engineering, Bobby B. Lyle School of Engineering, Southern Methodist University, Dallas, TX 75275, USA
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Received: 28 June 2018 / Revised: 16 July 2018 / Accepted: 17 July 2018 / Published: 20 July 2018
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Abstract

Progressive collapse, the extensive or complete collapse of a structure resulting from the failure of one or a small number of structural components, has become a focus of research efforts and design considerations following events occurring at the Ronan Point apartment building in London, the Murrah Federal Building in Oklahoma City, and the World Trade Center in New York City. A principle research and design area for progressive collapse investigates the behavior of structural frames when column support is removed. The mechanism that results from loss of column support in structural frames characteristically involves beams that are unable to provide sufficient flexural resistance. Cable retrofit is one method to enhance existing frames and supplement or replace the post-mechanism beam load resistance with straight-legged catenary resistance after a column removal. The cables are located linearly along the beam geometry and are affixed at beam supports. This paper investigates both static and dynamic behavior of the catenary action of retrofit cables, which include both the linear and nonlinear material behavior of the cable material. Moreover, a simplified model serves as the basis for retrofit cable design is presented. Finite element modeling and experimentation in this paper verify and validate the applicability of the model. Finally, a framework for developing a procedure for retrofit cable design is presented. View Full-Text
Keywords: progressive collapse; disproportionate collapse; catenary action; non-linear analysis; cable retrofit; modified catenary progressive collapse; disproportionate collapse; catenary action; non-linear analysis; cable retrofit; modified catenary
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Deputy, L.T.; Zeinali, Y.; Story, B.A. A Modified Catenary Model with Application to the Analysis and Design of Retrofit Cables for Progressive Collapse. Infrastructures 2018, 3, 26.

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