Experimental And Numerical Investigation Of
The Sliding Behaviour Of A Set Of Two Rigid
Blocks Subjected To Cyclic Shear-type Loads
Author(s)
G. C. Manos, V. Kourtides & V. J. Soulis
Abstract
The aim of this paper is to study the shear transfer mechanism along horizontal
rigid block interfaces. The shear resistance offered by this interface is the main
mechanism mobilized by the structural elements of many historical stone
masonry structures in order to transfer horizontal actions from earthquakes and
wind forces to the foundations. Cyclic shear experiments were performed in the
laboratory in order to study this shear behaviour in the interface between two
rigid blocks. Three groups of rigid block specimens are utilized with tests
performed by different researchers. The first group includes two steel blocks
with a horizontal interface made smooth by special machining. The second group
is made of white marble (Kavala Greek Type) and the interface this time resulted
from the formation of the marble blocks by special stonemasons. The shear
behaviour of these two groups was studied at the laboratory of Strength of
Materials and Structures of Aristotle University. The third group is made of
sandstone blocks and its shear behaviour was studied at the University of Minho,
Portugal. During all these tests the imposed cyclic horizontal displacement
sequence was combined with a constant level of vertical load applied at the top
of the upper block. Through this experimental process, it has become possible to
describe the shear transfer mechanism through diagrams of horizontal
displacement versus horizontal load. Numerical simulations of this problem were
also performed by finite element analysis utilizing two commercial Finite
Element Software packages. Two interface models, which are able to reproduce
the sliding response, are utilized in the numerical simulation. Combined with the
performed cyclic-sliding experiments, a numerical analysis is made. Part of the
numerical investigation is based on the classical Mohr-Coulomb criterion and
studies ways to use this criterion with such characteristics that can reflect the
influence on the sliding behaviour of surface roughness, certain levels of dilation
angle and inelastic behaviour.
Keywords: rigid blocks, coulomb failure criterion, dilation angle, cyclic loading.
Keywords
rigid blocks, coulomb failure criterion, dilation angle, cyclic loading.
Related Book
Other papers in this volume
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