Strength and Deformation of Masonry from Ceramic Bricks in Shear across Horizontal Joints

Demchuk I.

ABSTRACT

The problem of lack of data on shear strength of masonry and its deformation characteristics in shear across horizontal joints in the existing normative documents has identified. At the same time, sufficient results in researches of many authors provide to assess the importance of the considered characteristics. In this study the aim was to assess the possibility of using numerical methods of calculation in determining the strength and deformation characteristics of masonry, since conducting physical experiments is expensive when analyzing large number of parameters. In results experimental and numerical studies of shear strength, shear modulus and shear strain angles in shear across horizontal mortar joints of masonry from ceramic solid and cellular units were carried out. Based on experimental studies numerical micro-models of masonry specimens were developed. Verification studies have shown a satisfactory convergence of numerical models with experimental results. In modeling shear across a horizontal mortar joints, it was determined the influence of the level of compressive stress and the ratio of the sides size of specimens on the deformation and strength characteristics of masonry, which experimentally is quite difficult to perform. The shear strength and shear strain angles decrease with increase of the aspect ratio of the specimen. At levels of compression masonry from solid bricks more than 30% of the compressive strength and masonry of hollow blocks – more than 70%, there is a sharp drop in the values of shear strength of masonry.

Keywords: masonry, shear strength, shear modulus, shear strain angles, solid ceramic brick, hollow ceramic brick.

For citation: Demchuk I. Strength and Deformation of Masonry from Ceramic Bricks in Shear across Horizontal Joints. In: Contemporary Issues of Concrete and Reinforced Concrete: Collected Research Papers. Minsk. Institute BelNIIS. Vol. 9. 2017. pp. 183–205. https://doi.org/10.23746/2017-9-12

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