Title: Effects of the yield and ultimate strengths of the equivalent strut models on the response of existing buildings with infill panels

Authors: Andrea Fiore; Francesco Porco; Giuseppina Uva

Addresses: DICATECh, Politecnico di Bari, Via Orabona 4 – 70126 Bari, Italy ' DICATECh, Politecnico di Bari, Via Orabona 4 – 70126 Bari, Italy ' DICATECh, Politecnico di Bari, Via Orabona 4 – 70126 Bari, Italy

Abstract: The modelling of infilled frames is generally very difficult because of the several parameters influencing their response. Specifically, the macro-models have many uncertainties related to the definition of the Equivalent Rod that simulates the panel. Main parameters involved in the definition of the Equivalent Strut Models (the width of the strut, the constitutive Force-Displacement law of the panel and the number of struts adopted to simulate the panel) induce a great variability of the structural global response. Consequently, the quantification of the uncertainties that influence the building safety verification becomes very important. In order to investigate this issue, three examples of buildings were developed and the characteristic points of the nonlinear law of the struts (yield and maximum strength) were changed within a range of allowable values. The objective is to appraise the sensitivity of the structural capacity (in terms of displacement) of infill models.

Keywords: infilled frames; existing buildings; nonlinear static analysis; earthquakes; seismic assessment; masonry walls; non-structural elements; equivalent strut models; reinforced concrete buildings; yield strength; maximum strength; uncertainties; building safety verification; displacement; infill models.

DOI: 10.1504/IJSTRUCTE.2015.069690

International Journal of Structural Engineering, 2015 Vol.6 No.2, pp.140 - 157

Received: 17 Oct 2014
Accepted: 24 Oct 2014
Published online: 29 May 2015 *

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