Capacity of Shear Walls by Simple Equilibrium Models

Roca, Pere; Viviescas, Álvaro; Lobato, Miguel; Díaz, Carlos; Serra, Isabel

doi:10.1080/15583058.2010.501481

Cited by 24 publications

(8 citation statements)

References 6 publications

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“…The elements with width w and length L d ( Figure 3 ) play the role of stiffeners for the building [ 37 , 38 ]. The width of the element depends on the length of contact between the filling wall and the building skeleton [ 39 , 40 , 41 , 42 , 43 , 44 , 45 ]. Due to the masonry anisotropy discussed in the article, the actual strength of the wall will change depending on the slope of stress in relation to the plane of the bed joints of the wall.…”

Section: Introductionmentioning

confidence: 99%

Strength Parameters of Clay Brick Walls with Various Directions of Force

et al. 2021

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The study analyzes the anisotropy effect for ceramic masonry based on experimental tests of samples made of 25 × 12 × 6.5 cm3 solid brick elements with compressive strength fb = 44.1 MPa and cement mortar with compressive strength fm = 10.9 MPa. The samples were loaded in a single plane with a joint angle that varied from the horizontal plane. The load was applied in a vertical direction. The samples were loaded at angles of 90°, 67.5°, 45°, 22.5°, and 0° toward the bed joints. The most unfavourable cases were determined. It was observed that the anisotropy of the masonry significantly influences the load-bearing capacity of the walls depending on the angle of the compressive stresses trajectory. Approximation curves and equations for compressive strength, Young’s modulus, and Poisson’s coefficient were proposed. It was observed that Young’s modulus and Poisson’s ratio will also change depending on the trajectory of compressive stresses as a function of the joint angle. Experimental tests allowed to determine the failure mechanism in prepared specimens. The study allowed to estimate the masonry strength with the load acting at different angles toward the bed joints.

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Section: Introductionmentioning

confidence: 99%

Strength Parameters of Clay Brick Walls with Various Directions of Force

et al. 2021

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“…In double-clamped piers, the stress fan assumes the shape shown in Figure 2b, with a laterally expanding branch from top to mid-height and a contracting branch from mid-height to base. The angle of the right external line of the fan with respect to the vertical is limited by the shear strength characteristics of the masonry composite (Roca et al, 2011). Considering that the vertical stress at the edge of the fan is zero, the limit values for the tangent of this angle is:…”

Section: Biaxial Mode Capacitymentioning

confidence: 99%

“…Rocking mode failure arises due to the very low tensile strength of masonry perpendicularly to the bed joints, leading to a clear localisation of the bending crack. Models for the rocking capacity can be easily derived through simple equilibrium in bending (Magenes and Calvi, 1997;Roca et al, 2011). Other models have been proposed in design codes (Ministerio delle Infrastrutture e dei Trasporti, 2009).…”

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confidence: 99%

Analytical Models to Determine In-Plane Damage Initiation and Force Capacity of Masonry Walls with Openings

et al. 2021

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Masonry panels consisting of piers and spandrels in buildings are vulnerable to in-plane actions caused by seismicity and soil subsidence. Tectonic seismicity can be hazardous for the safety of masonry structures, whereas low-magnitude induced seismicity can be detrimental to their durability due to the accumulation of light damage. This is particularly true in the case of unreinforced masonry. Therefore, the development of models for the accurate prediction of both damage initiation and force capacity for masonry elements and structures is necessary.In this paper a method based on analytical modelling for the prediction of the damage initiation mode and capacity of stand-alone masonry piers is presented, followed by the expansion of the model through a modular approach to masonry walls with asymmetric openings. The models account for all potential damage and failure modes for in-plane loaded walls.The stand-alone piers model is applicable to all types of masonry construction. The wall with openings model can be applied as-is to simple buildings but can also be extended to more complex structures with 2 simple modifications. The model results are compared with numerous experimental cases and exhibit very good accuracy. Keywordsmasonry -earthquake engineering -analytical modelling -limit analysis -in-plane loading Highlights• Closed-form expressions predict the damage initiation mode and capacity of piers • Analytical modelling predicts the in-plane shear capacity of masonry walls with openings • The models are accurate against newly elaborated and existing experimental data

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“…The author of discussed strut and tie models [1,2] assumed the following: 1. Such models should be as simple as possiblethat is, the number of bars in compression and tension should be reduced to minimum.…”

Section: Short Description Of Used Modelsmentioning

confidence: 99%

“…In this papers discusses the experimental verification of strut and tie models presented in the papers [1,2]. The concept of strut and tie models can be briefly described as replacing the real structure with the equivalent virtual system of bars representing the whole wall, and not only the single section as in case of typical panel models.…”

Section: Introductionmentioning

confidence: 99%

Strut-and-Tie Models of Masonry Shear Walls

Jasiński¹

2018

Preprint

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This paper contains theoretical fundamentals of strut and tie models, used in unreinforced horizontal shear walls. Depending on support conditions and wall loading, we can distinguish models with discrete bars when point load is applied to the wall (type I model) or with continuous bars (type II model) when load is uniformly distributed at the wall boundary. The main part of this paper compares calculated results with the own tests on horizontal shear walls made of solid brick, silicate elements and autoclaved aerated concrete. The tests were performed in Poland. The model required some modifications due to specific load and static diagram.

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Capacity of Shear Walls by Simple Equilibrium Models

Cited by 24 publications

References 6 publications

Strength Parameters of Clay Brick Walls with Various Directions of Force

Strength Parameters of Clay Brick Walls with Various Directions of Force

Analytical Models to Determine In-Plane Damage Initiation and Force Capacity of Masonry Walls with Openings

Strut-and-Tie Models of Masonry Shear Walls

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