6 documents found, page 1 of 1
Comparison of different numerical modelling approaches for the assessment of th...
Murano, Antonio; Mehrotra, Anjali Abhay; Ortega, Javier; Rodrigues, Hugo; Vasconcelos, GraçaThis work compares the ability of different numerical modelling approaches to simulate the out-of-plane behaviour of two-leaf stone masonry walls with different masonry bond configurations: an irregular drystone stone masonry wall and a masonry wall with roughly cut regular stone units. Finite element modelling, considering both a micro and macro-modelling approach, and the distinct element method have been com...
Experimental, numerical and analytical investigations of masonry corners: Influ...
Colombo, Carla; Savalle, Nathanaël; Funari, Marco Francesco; Mehrotra, Anjali Abhay; Lourenço, Paulo B.The present work aims to expand the knowledge of the behaviour of masonry corners, which are capital to obtain an integral seismic response in masonry buildings. In particular, the influence of the seismic load orientation (from pi/4 to pi/2) is investigated experimentally, numerically and analytically. Both units and interfaces have been subjected to a material characterisation process, following which pseudo-...
Dynamic simulation of one-sided rocking masonry façades using an energy-consist...
Vlachakis, Giorgios; Giouvanidis, Anastasios; Mehrotra, Anjali Abhay; Lourenço, Paulo B.Unreinforced masonry façades are specifically vulnerable to seismic actions. Their weak connectivity with adjacent structural members results in their detachment during an earthquake, thus, forming local collapse mechanisms which exhibit one-sided rocking motion. Such mechanisms can accommodate considerable displacements before collapsing/overturning. Hence, their dynamic stability is of great interest. The dyn...
A tool for the rapid seismic assessment of historic masonry structures based on...
Funari, Marco Francesco; Mehrotra, Anjali Abhay; Lourenço, Paulo B.This paper presents a user-friendly, CAD-interfaced methodology for the rapid seismic assessment of historic masonry structures. The proposed multi-level procedure consists of a two-step analysis that combines upper bound limit analysis with non-linear dynamic (rocking) analysis to solve for seismic collapse in a computationally-efficient manner. In the first step, the failure mechanisms are defined by means of...
Numerical block-based simulation of rocking structures using a novel universal ...
Vlachakis, Giorgios; Giouvanidis, Anastasios; Mehrotra, Anjali Abhay; Lourenço, Paulo B.Unreinforced masonry structures, particularly façade walls, are seismically vulnerable due to their weak connections with adjacent walls, floors, and/or roofs. During an earthquake, such walls formulate local mechanisms prone to out-of-plane collapse. This behavior has been largely investigated using classical rocking theory, which assumes the structure responds as a rigid body undergoing rocking motion, with e...
An equivalent viscous damping proposal for block-based rocking models
Vlachakis, Giorgios; Colombo, Carla; Giouvanidis, Anastasios; Mehrotra, Anjali Abhay; Savalle, Nathanaël; Lourenço, Paulo B.Masonry structures have been observed to display a high vulnerability to failure under seismic action. This stems from the fact that their structural configurations usually lack adequate connections among the distinct elements, resulting in the formation of local mechanisms experiencing Out-Of-Plane (OOP) collapse. In this context, rocking dynamics has proven to be a valuable methodology for the analysis of mas...