Dynamic response analysis of solitary flexible rocking bodies: modeling and behavior under pulse-like ground excitation
Abbreviated Journal Title
Earthq. Eng. Struct. Dyn.
rocking structures; fem modelling; overturning stability; seismic; response; SEISMIC RESPONSE; FOUNDATION UPLIFT; RIGID BLOCKS; COLUMNS; EARTHQUAKES; FOOTINGS; BEAM; Engineering, Civil; Engineering, Geological
Results obtained for rigid structures suggest that rocking can be used as seismic response modification strategy. However, actual structures are not rigid: structural elements where rocking is expected to occur are often slender and flexible. Modeling of the rocking motion and impact of flexible bodies is a challenging task. A non-linear elastic viscously damped zero-length spring rocking model, directly usable in conventional finite element software, is presented in this paper. The flexible rocking body is modeled using a conventional beam-column element with distributed masses. This model is verified by comparing its pulse excitation response to the corresponding analytical solution and validated by overturning analysis of rocking blocks subjected to a recorded ground motion excitation. The rigid rocking block model provides a good approximation of the seismic response of solitary flexible columns designed to uplift when excited by pulse-like ground motions. Guidance for development of rocking column models in ordinary finite element software is provided. Copyright (C) 2014 John Wiley & Sons, Ltd.
Earthquake Engineering & Structural Dynamics
"Dynamic response analysis of solitary flexible rocking bodies: modeling and behavior under pulse-like ground excitation" (2014). Faculty Bibliography 2010s. 6222.