Naslov
Dynamics of multi-block stacks subjected to pulse base excitation - experimental evidence and non smooth contact dynamics simulations

Autori
Čeh, Nina ; Pellegrino, Antonio ; Camenen, Jean-Francois ; Petrinić, Nik ; Jelenić, Gordan ; Koziara, Tomasz ; Bićanić, Nenad

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering / Papadrakakis, M. ; Papadopoulos, V. ; Plevris, V. - Lahti : Institute of Structural Analysis and Antiseismic Research, School of Civil Engineering, National Technical University of Athens (NTUA), 2015, 3234-3247

ISBN
978-960-99994-7-2

Skup
5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering

Mjesto i datum
Kreta, Grčka, 25.05.2015. - 27.05.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
block dynamics ; pulse base excitation ; simulations ; experimental validation ; block overturning ; non smooth contact dynamics

Sažetak
Experimental and computational dynamic sensitivity study of Multi-Block Stacks subjected to Pulse Base Excitation is considered. Advanced non contact optical measuring technique based on the GOM Aramis and Pontos systems, as well as the corresponding processing software (displacement history of control sensor points, with a high resolution high speed cameras) have been applied to replace conventional displacement measuring systems and accelerometers. The Non Smooth Contact Dynamics (NSCD) time integration simulation framework SOLFEC http://code.google.com/p/solfec/ is adopted here for comparative NSCD analyses, including a sensitivity study on interface characteristics, as a validation process. Series of test experiments were conducted and recorded on a bespoke platform with and without lateral constraints in the Oxford Impact Engineering Laboratory and Rijeka University Structural Dynamics Laboratory for an extensive series of controlled pulse base excitation tests of multi block stacks configurations. Impact is generated by a pin-ball mechanism with spring and a wooden projectile, attached to an optical bench. For the NSCD simulations the base was subjected to a constant acceleration over a finite time, thereby facilitating the characterisation of multi block stacks tumbling modes of failures (global or partial), as a function of stop gap distance. Creation of well documented benchmarks for the validation of simulation paradigms for discontinuous media will be extremely valuable for researchers and code developers (non smooth contact dynamics, discrete elements, discontinuous deformation analysis), as well as for safety case engineers and industry regulators.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Temeljne tehničke znanosti

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