Effects of bond-slip and masonry infills interaction on seismic performance of older R/C frame structures

A simplified method to predict torsional effects on asymmetric seismic isolated buildings under bi-directional earthquake components

“…International building codes allow using linear and non-linear analysis methods for design and check of seismically isolated structures, both new and existing. As it is known, in general considering the non-linear behaviour of structures implies to keep in count several aspects and phenomena, such as those inherent to structural damage and non-ductile mechanisms (Calvi et al 2002;Braga et al 2009) infills-frame interaction (Mohammad et al 2016) rebars bond-slip (Laterza et al 2017 a,b;Caprili et al 2018, Mohammad et al 2018, complex structure-isolation interaction in dynamic conditions due to devices nonlinearity (Braga et al 2005), and complex dynamic behavior due to irregularity and eccentricity in conjunction with earthquake directionality (Faggella et al 2018). These may lead to increased modelling and computational effort and likely uneasy interpretation of results, making nonlinear modelling approaches often unpractical for day-to-day design purposes by professional engineers.…”

Intervention cost optimization of bracing systems with multiperformance criteria

“…The effects of the brittle mechanisms, in particular of the beam-column joints, and the bond slip effects are not taken into consideration. Despite the relevance and the wide possibilities of modelling these aspects [45][46][47][48][49][50], it has been chosen to develop a numerical model coherent with the proposed procedure which, as discussed above, does not currently consider such phenomena. Moreover, unidirectional analyses are carried out without considering 3D effects.…”

Seismic Isolation for Protecting Historical Buildings: A Case Study

“…Commonly, seismic isolation is used for retrofitting of Reinforced Concrete (RC) existing buildings, since very often they were designed only for vertical loads without any detailing rule for ductility, as highlighted in some recent studies such as, among the others, (Laterza et al, 2017a). In these cases, the seismic isolation is preferred to widespread and more invasive local interventions, consisting in strengthening and improving the confinement of the elements (Braga et al, 2006;D'Amato et al, 2012a,b;Laterza et al, 2017b;Caprili et al, 2018;Faqeer et al, 2018), or consisting in adding new structural elements in order to carry the seismic loads and dissipate energy (Ciampi et al, 1995;Manfredi, 2010, 2012;Mazza and Vulcano, 2014;Laguardia et al, 2017;Braga et al, 2019).…”