A nonlinear macroelement model for the seismic analysis of masonry buildings

Abstract

The macroelement technique for modelling the nonlinear response of masonry panels is particularly efficient and suitable for the analysis of the seismic behaviour of complex walls and buildings. The paper presents a macroelement model specifically developed for simulating the cyclic in-plane response of masonry walls, with possible applications in nonlinear static and dynamic analysis of masonry structures. The model, starting from a previously developed macroelement model, has been refined in the representation of flexural-rocking and shear damage modes, and it is capable of fairly simulating the experimental response of cyclic tests performed on masonry piers. By means of two internal degrees of freedom, the two-node macroelement permits to represent the coupling of axial and flexural response as well as the interaction of shear and flexural damage.

Issues on the Use of Time-History Analysis for the Design and Assessment of Masonry Structures

“…The nonlinear macro-element model representative of a whole masonry panel described in Penna et al [10] permits, with a limited number of degrees of freedom (8), to represent the two main in-plane masonry failure modes, i.e. bending-rocking and shear-sliding (with friction) mechanisms (and their interaction), on the basis of mechanical assumptions.…”

“…ring beams, internal columns and walls in mixed structures) can be also modeled by 2-node elements with simplified Takeda nonlinear behavior (Figure 2). Figure 2 Bilinear simplified Takeda model for simulating the cyclic response of RC members [13].…”

A New Computational Approach for the Rocking Response of Deformable Bodies Considering Material Nonlinearity

“…However, few computational models exist for modeling the response of deformable rocking bodies (e.g. [9], [10], [11], [12], [13], [14], [15], [16], [17]). Most of these studies, though, consider the rocking base to be rigid, take into account the stress nonlinearity only across the rocking interface or make simplifications regarding the stress distribution near the contact area.…”

Anisotropic Failure Criterion for Britle Materials Using Artificial Neural Networks

“…To fulfill this need, in the last decades a large number of macro and micro computational models have been proposed for both the linear and the non-linear analysis of such structures [1][2][3][4][5]. Detailed and in-depth state-of-the-art reports can be found in [6][7][8][9][10][11].…”