Naslov
Numerical and experimental investigation of collapse modes in stacked structures

Autori
Čeh, Nina ; Jelenić, Gordan ; Camenen, Jean-Francois

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Skup
7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering

Mjesto i datum
Kreta, Grčka, 24.06.2019. - 26.06.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
rocking ; stacked structures ; dual-block stack

Sažetak
Structures that consist of multiple rigid blocks stacked one on top of another, such as historical monuments, dry-stone walls and domes, Advanced Gas-cooled Reactor blocks in nuclear-power plants, or masonry components upon bond failure, respond to dynamic excitation in sense that cannot be explained by standard eigen-analysis. During earthquakes such structures undergo complex dynamic response with multiple contact discontinuities - a combination of rocking, sliding and jumping - which can result in structural failure. Given sufficient friction at all the contacts, the dynamic response of a multi-block stack to a ground excitation mainly consists of pure rocking with negligible sliding and jumping. In this work, the highlight is put onto the excitation conditions that cause specific collapse modes of two- and three-block stacks: partial collapse (only one or several top bodies overturn) or total collapse (the whole stack overturns). The excitation conditions that cause different failure modes are investigated numerically and experimentally on a novel set of experiments. The experimental programme is conducted using a biaxial shaking platform and a system of high-speed cameras for contactless optical measurement. Rocking-stability graphs for multi-block stacks subject to simple ground excitation are obtained and proposed as benchmark cases for validation of complex numerical platforms widely used to simulate multibody dynamics in practice.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Temeljne tehničke znanosti

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