Rigid Block Sliding to Idealized Acceleration Pulses
Publication: Journal of Engineering Mechanics
Volume 138, Issue 9
Abstract
New analytical solutions are derived for the frictional sliding of rigid blocks to idealized ground acceleration pulses. These excitations are indicative of near-fault earthquake motions affected by forward fault-rupture directivity, which may inflict large permanent displacements in the absence of substantial frictional resistance at the sliding interface. The scope of this study is threefold: (1) to derive analytical solutions for a wide set of idealized pulses; (2) to investigate the effects of symmetric and asymmetric sliding under both unilateral and bilateral excitation conditions; and (3) to explore alternative normalization schemes of peak sliding with reference to peak pulse acceleration, velocity, duration, and shape. A generalized exponential function, capable of simulating an infinite number of pulse waveforms based on a single parameter, is employed to this end. Results are presented in the form of dimensionless closed-form expressions and graphs that provide insight into the physics of the nonlinear problem.
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Acknowledgments
This research was supported by NTUA Basic Research Program Grant No. 65/1720. The authors are grateful for this support.
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Information
Published In
Journal of Engineering Mechanics
Volume 138 • Issue 9 • September 2012
Pages: 1071 - 1083
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Feb 9, 2011
Accepted: Feb 15, 2012
Published online: Feb 18, 2012
Published in print: Sep 1, 2012
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