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Steel and Composite Structures Volume 19, Number 3, September 2015 , pages 697-711 DOI: https://doi.org/10.12989/scs.2015.19.3.697 |
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Prediction of hysteretic energy demands in steel frames using vector-valued IMs |
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Edén Bojórquez, Laura Astorga, Alfredo Reyes-Salazar, Amador Terán-Gilmore, Juan Velázquez, Juan Bojórquez and Luz Rivera
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| Abstract | ||
| It is well known the importance of considering hysteretic energy demands for the seismic assessment and design of structures. In such a way that it is necessary to establish new parameters of the earthquake ground motion potential able to predict energy demands in structures. In this paper, several alternative vector-valued ground motion intensity measures (IMs) are used to estimate hysteretic energy demands in steel framed buildings under long duration narrow-band ground motions. The vectors are based on the spectral acceleration at first mode of the structure Sa(T1) as first component. As the second component, IMs related to peak, integral and spectral shape parameters are selected. The aim of the study is to provide new parameters or vector-valued ground motion intensities with the capacity of predicting energy demands in structures. It is concluded that spectral-shape-based vector-valued IMs have the best relation with hysteretic energy demands in steel frames subjected to narrow-band earthquake ground motions. | ||
| Key Words | ||
| intensity measures; hysteretic energy; steel frames; spectral shape; narrow-band motions | ||
| Address | ||
| (1) Edén Bojórquez, Laura Astorga, Alfredo Reyes-Salazar, Juan Velázquez, Luz Rivera: Facultad de Ingenierĺa, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n, 80040 Culiacán; (2) Amador Terán-Gilmore: Departamento de Materiales, Universidad Autónoma Metropolitana, México City, México; (3) Juan Bojórquez: Instituto de Ingenierĺa, Universidad Nacional Autónoma de México, México City, México. | ||