Simplified macro‐model for infill masonry walls considering the out‐of‐plane behaviour

Abstract

SUMMARYOne of the main challenges in earthquake risk mitigation is the assessment of existing buildings not designed according to modern codes and the development of effective techniques to strengthen these structures. Particular attention should be given to RC frame structures with masonry infill panels, as demonstrated by their poor performance in recent earthquakes in Europe. Understanding the seismic behaviour of masonry-infilled RC frames presents one of the most difficult problems in structural engineering. Analytical tools to evaluate infill-frame interaction and the failure mechanisms need to be further studied. This research intends to develop a simplified macro-model that takes into account the out-of-plane behaviour of the infill panels and the corresponding in-plane and out-of-plane interaction when subjected to seismic loadings. Finally, a vulnerability assessment of an RC building will be performed in order to evaluate the influence of the out-of-plane consideration in the building response.

Empirical‐based out‐of‐plane URM infill wall model accounting for the interaction with in‐plane demand

“…Furtado et al defined an infill model inspired by the proposal of Kadysiewski and Mosalam. In this model, the infill is represented by four diagonal rigid elements joined in the center by one element, which takes into account the nonlinearity of the infill behavior.…”

Empirical Unreinforced Masonry Infill Macro-Model Accounting for in-Plane/Out-of-Plane Interaction

“…Furtado et al, [42], Longo et al, [43], Shing et al, [44], proposed improvements of Kadysiewski and Mosalam's model. A distributed-plasticity infill model was proposed by Oliaee and Magenes in [45].…”

Empirical-Based Infill Model Accounting for in-Plane/Out-of-Plane Interaction Applied for the Seismic Assessment of Ec8-Designed Rc Frames

“…Furtado et al [17] defined a "Kadysiewski and Mosalam-based" macro-model in which the infill is represented by 4 diagonal rigid elements joined in the center by one element which takes into account the non-linearity of the infill behaviour. The central element is joined to the diagonal struts through 2 nodes in which the OOP mass is lumped.…”