Experimental investigation of the in-plane cyclic behaviour of calcium silicate brick masonry walls

Messali, Francesco; Esposito, Rita; Ravenshorst, Geert; Rots, J.G.

doi:10.1007/s10518-020-00835-x

Cited by 35 publications

(26 citation statements)

References 23 publications

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“…The material properties adopted are presented in Table 2. These properties were obtained by companion material tests that were carried out at the same time period and from the same batch of materials as the large wall tests 41,61,62 . For some properties no data from companion tests was available.…”

Section: Validationmentioning

confidence: 99%

A total‐strain based orthotropic continuum model for the cyclic nonlinear behavior of unreinforced brick masonry structures

Sousamli

Messali

Rots

2022

Numerical Meth Engineering

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Plane‐stress and shell macromodels are often preferred to analyze masonry structures because of their numerical efficiency. However, they often misestimate the hysteretic behavior of the structures. Additionally, due to the nature of smeared cracks, the cracks may be diffused. This article proposes a new orthotropic model, which focuses on the cyclic, nonlinear behavior of brick masonry structures. The model adopts a total‐strain based rotating crack approach. It describes tensile and compressive failure in the rotating principal directions, while including indirectly shear failure through an internal iterative algorithm. Two distinctions are made regarding the tensile postpeak and unloading/reloading behavior based on the crack orientation at crack initiation: a steep softening branch and secant unloading are adopted when the crack angle corresponds to in‐plane flexural failure, and a softening branch and bilinear unloading are adopted when the crack angle corresponds to diagonal shear failure. Bilinear unloading/reloading is adopted in compression, resulting in a cyclic behavior resembling shear. The constitutive model was implemented in a finite element software and validated against experimental results. The numerical simulations reproduced well the experimental outcomes in terms of envelope load‐displacement curve and hysteretic behavior, while simultaneously they resulted in localized damage, representative of the experimental crack patterns.

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Section: Validationmentioning

confidence: 99%

A total‐strain based orthotropic continuum model for the cyclic nonlinear behavior of unreinforced brick masonry structures

Sousamli

Messali

Rots

2022

Numerical Meth Engineering

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“…Messali et al [ 65 ] have provided results related to regular masonry walls made of calcium silicate units (from Case 11-R to Case 14-R in Table 5 ), characterized by two different geometries to test both squat and slender walls. The slender walls were 1.1 m long and 2.7 m high ( λ = 2.45), while the squat walls were 4 m long and 2.7 m high ( λ = 0.67).…”

Section: Theoretical Vs Experimental In-plane Shear Capacitymentioning

confidence: 99%

Literature Review of the In-Plane Behavior of Masonry Walls: Theoretical vs. Experimental Results

et al. 2021

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In-plane strength of masonry walls is affected by the resistant mechanisms activated in the walls, i.e., related to flexural or shear behavior. The latter one can occur in the walls according to different failure modes depending on both mortar and unit strengths and on the type of assembling, i.e., ‘regular’ or ‘irregular’ texture. In this paper, a critical review of the existing design formulations for the in-plane strength of masonry walls is firstly presented, with important information on the achievable failure modes depending on the geometrical and mechanical features of the masonry fabric. Then, experimental tests are collected from the literature and a comparison between theoretical and experimental results is carried out. The presented analyses are aimed to highlight the differences between the existing formulations and to identify the most suitable ones.

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“…The local building stock, composed for more than 50% of masonry buildings with timber diaphragms [33], was not designed or realized by accounting for seismic events, since the Province of Groningen has never been a (tectonic) seismic area before. Therefore, extensive seismic characterizations have taken place since 2015 [34] for both masonry [35,36] and timber [37][38][39][40][41] structural components.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Seismic Capacity of Existing Masonry Buildings by Retrofitting Timber Floors: Wood-Based Solutions as a Dissipative Alternative to Rigid Concrete Diaphragms

Mirra

Ravenshorst

2021

Buildings

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The inadequate seismic performance of existing masonry buildings is often linked to the excessively low in-plane stiffness of timber diaphragms and the poor quality of their connections to the walls. However, relevant past studies and seismic events have also shown that rigid diaphragms could be detrimental for existing buildings and do not necessarily lead to an increase in their seismic performance. Therefore, this work explores the opportunity of optimizing the retrofitting of existing timber floors by means of a dissipative strengthening option, consisting of a plywood panel overlay. On the basis of past experimental tests and previously formulated analytical and numerical models for simulating the in-plane response of these retrofitted diaphragms, in this work nonlinear incremental dynamic analyses were performed on three case–study buildings. For each structure three configurations were analyzed: an as-built one, one having floors retrofitted with concrete slabs and one having dissipative diaphragms strengthened with plywood panels. The results showed that the additional beneficial hysteretic energy dissipation of the optimized diaphragms is relevant and can largely increase the seismic performance of the analyzed buildings, while rigid floors only localize the dissipation in the walls. These outcomes can contribute to an efficient seismic retrofitting of existing masonry buildings, demonstrating once more the great potential of wood-based techniques in comparison to the use of reinforced concrete for creating rigid diaphragms.

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Experimental investigation of the in-plane cyclic behaviour of calcium silicate brick masonry walls

Cited by 35 publications

References 23 publications

A total‐strain based orthotropic continuum model for the cyclic nonlinear behavior of unreinforced brick masonry structures

A total‐strain based orthotropic continuum model for the cyclic nonlinear behavior of unreinforced brick masonry structures

Literature Review of the In-Plane Behavior of Masonry Walls: Theoretical vs. Experimental Results

Optimizing Seismic Capacity of Existing Masonry Buildings by Retrofitting Timber Floors: Wood-Based Solutions as a Dissipative Alternative to Rigid Concrete Diaphragms

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