A simplified four-branch model for the analytical study of the out-of-plane performance of regular stone URM walls

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Tiago Miguel Ferreira (Author) Other; Alexandre A Costa (Author) Other; Romeu Vicente (Author) Other; Humberto Varum (Author) FEUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: ENGINEERING STRUCTURES

Vol. 83

Pages: 140-153

ISSN: 0141-0296

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 21 Citations

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Structural engineering

Other information

Authenticus ID: P-009-ZE4

DOI: 10.1016/j.engstruct.2014.10.048

Abstract (EN): During the last years, several studies have been made aiming to assess the out-of-plane seismic response of unreinforced stone masonry structures. This fact led to the development of a wide variety of models and approaches, ranging from simple kinematic based analytical models up to complex numerical simulations. Nevertheless, for the sake of simplicity, the out-of-plane seismic response of a masonry wall pier may be obtained by means of a simple single-degree-of-freedom system while still providing good results. In fact, despite the assumptions associated with such a simple formulation, it is also true that the epistemic uncertainty inherent with the selection of appropriate input parameters in more complex models may render them truly ineffective. In this framework, this paper focuses on the study of the out-of-plane bending of unreinforced stone masonry walls (cantilevers) by proposing a simplified analytical approach based on the construction of a linearized four-branch model, which is used to characterize the linear and nonlinear response of such structural elements through an overturning moment-rotation relationship. The formulation of the four-branch model is presented and described in detail and the meaningful parameters used for its construction are obtained from a set of experimental laboratory tests performed on six full-scale unreinforced regular sacco stone masonry specimens. Moreover, a parametric analysis aiming to evaluate the effect of these parameters' variation on the final configuration of the model is presented and critically discussed. Finally, the results obtained from the application of the developed four-branch model on real unreinforced regular sacco stone masonry walls are thoroughly analysed and the main conclusions obtained from its application are summarized.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14