Structural analysis of RC infilled frames with participating masonry: a proposal procedure for multi-strut models

Análise estrutural de pórticos de concreto armado preenchidos com alvenarias participantes: proposta de procedimento para o uso de modelos de múltiplas diagonais

abstract:

In this paper, a procedure is proposed for the use of multi-strut models for the structural analysis of RC frames infilled with participating masonry subjected to lateral loads. It is therefore proposed that the eccentricities of the equivalent struts be obtained from the equivalent strut width of the classic single-strut model, whose value can be estimated from analytical expressions in the literature. The proposed models are validated by Finite Element Method (FEM) modeling, which simulates the contact between the infill masonry and the frame. It could be concluded that the proposed modeling provided better results than the classic single-strut model in obtaining the maximum shear force acting in the columns. It was also noted that the differences of the equivalent strut models in relation to the FEM results were higher with the increase of the participating masonry stiffness.

Keywords:
infilled frames; participating masonry; equivalent strut models; RC structures; structural analysis