Force‐displacement model for solid confined masonry walls with shear‐dominated failure mode

Abstract

Summary This paper addresses the behavior of confined masonry walls with dominating shear failure mode in walls. For this purpose, failure modes of these walls are classified in details. For each failure mode, complete set of analytical‐based relations for deriving parameters related to backbone curves is introduced. Calibrated finite element analyses are utilized as a benchmark for verification of some of the assumptions. The results of the proposed relations are compared with those of several Iranian and non‐Iranian experimental data. Sensitivity analysis is performed in order to understand the effects of important behavioral characteristics of these walls. The results of this study indicate that the proposed relations can accurately simulate behavior of confined masonry walls with dominating shear failure mode regardless of the failure mode in the ties. Moreover, it is concluded that the detailing limitations given in the Iranian Seismic Code are rationally compatible with the behavioral characteristics of confided masonry walls. The results of this study in terms of backbone curves can be utilized as the complementary part to this code. Copyright © 2017 John Wiley & Sons, Ltd.

Structural behaviour and design rules of confined masonry walls: Review and proposals

“…According to Yekrangnia et al [17], for walls subjected to in-plane lateral loads, there are possible three failure modes for the masonry panel (shear-sliding, diagonal-tension and toe-crushing) and three failure modes for the tie-columns (shear failure at the base of the far-tie, tensile failure at the base of the neartie, and compressive failure at the base of the far-tie) which can be combined. Such a combination of mechanisms depends on the specific features of the masonry panel and tie-elements, and is the basis for the theoretical approach proposed in that work.…”

“…Beyond the technological development in the building industry sector, a significant advance was observed concerning the experimental and theoretical background on the behaviour of CM. When considering for a wall the different possible failure modes of both the masonry panel and the RC tie-columns, which depend on their materials and dimensions, a complex failure mechanism is expected to occur involving interactively the masonry and the tie-columns (Yekrangnia et al [17]). The wall aspect ratio and the shear force-bending moment interaction are also aspects to consider for the shear resistance of CM walls; see Pérez-Gavilán et al [38].…”

“…Assuming the entire wall section made of a same material, and a rectangular stress distribution based on the design compressive strength of masonry or concrete, whichever is the lesser, the equilibrium of loads is as illustrated in Figure 21 and formulated in Equations ( 16) and (17). Note that yielding of steel in tension is assumed and reinforcement in compression is ignored.…”

Lateral in-plane seismic response of confined masonry walls: From numerical to backbone models

“…The adoption of different values for the ratios is related with local variability of test results due to different materials and configurations used for the CM walls, leading to different proportions in the behavioural stages. A more complex formulation of force and drift ratios depending on particular events that drive the failure mechanism are proposed by Yekrangnia (2017) [37]. [20], and also from the numerical simulations performed in this work.…”

Classification and seismic fragility assessment of confined masonry school buildings

“…A significant amount of experimental (San Bartolomé et al 1992;Alcocer et al 2004a;Zavala et al 2004; San Bartolome et al 2012;Quiroz et al 2014;Chourasia et al 2016;Singhal and Rai 2016);, analytical (Tomaževič and Klemenc 1997a;Tomaževič 1999;Marques and Lourenço 2013;Yekrangnia et al 2017;Erberik et al 2019) and numerical (Nucera et al 2012;Torrisi et al 2012;Lang and Benzoni 2014;Marques and Lourenço 2014) research has been carried out to investigate the behaviour of CM walls and buildings. These studies mostly focus on in-plane (IP) behaviour of CM walls and global behaviour of CM buildings.…”