Shear Fracture In Masonry Joints
Author(s)
K. Chaimoon & M. M. Attard
Abstract
This paper presents the shear behaviour of masonry bed joints before and after
peak load investigated by means of deformation-controlled tests. The results
concern those parameters required by micro-models: shear bond strength in
relation to the cohesion and internal friction angle; shear modulus; and post-peak
behaviour including mode II fracture energy; friction coefficient; dilatancy
behaviour; and in particular, unloading-reloading characteristic.
Keywords: shear fracture, masonry joint, post-peak behaviour, unloading-reloading
characteristic.
1 Introduction
It is well understood that the behaviour of masonry structures depends strongly
on mortar properties. The failure of masonry beams under three point bending
with low bond strength may be governed by both mode I and mode II fracture
rather than just mode I failure as for example in a concrete beam.
In order to obtain an insight into the shear failure behaviour, an experimental
and numerical research program has been carried out at the University of New
South Wales, [1, 2]. Full-scale masonry panels with two different strengths of
mortar were tested under three-point bending.
To carry out the numerical modelling, the fracture properties for tension,
shear, and compression are need. In this paper the results of shear tests
performed to derive all the parameters pertaining to mode II fracture are
presented, in order to obtain a better understanding of shear-fracture.
Keywords
shear fracture, masonry joint, post-peak behaviour, unloading-reloading
characteristic.
Related Book
Other papers in this volume
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