Static Cyclic Tests On URM Walls After
Retrofitting With Hardwires And GFRP
Author(s)
M. ElGawady, P. Lestuzzi & M. Badoux
Abstract
This paper presents part of the static cyclic tests carried out in Switzerland. The
test specimens were half-scale unreinforced masonry (URM) walls built using
hollow clay brick and weak mortar. The specimens had an effective moment to
shear ratio of 0.67. One of the specimens was a reference specimen while the
other two specimens were retrofitted specimens. The specimens were retrofitted
using either hardwire or glass fiber reinforced polymers GFRP. The specimens
were subjected to a series of force and displacement control test runs. The test
shows that the composites improve the cracking and ultimate load of the
retrofitted specimen as much as three times the original cracking and ultimate
load. In addition, there was no yielding of the hardwire during failure.
Keywords: seismic, in-plane, composites, retrofitting.
1 Introduction
Recent earthquakes have shown the vulnerability of URM buildings. Modern
fiber reinforced polymers (FRP) materials offer promising retrofitting
possibilities for masonry buildings. Several researchers (e.g. ElGawady et al.
[1, 2], Ehsani et al. [3], and Schwegler [4]) explored the improvement in the out-of-
plane and in-plane resistance of URM walls retrofitted with FRP.
2 Experimental program
The experimental results presented here are part of an ongoing static cyclic
testing program. This paper reports on the following tests:
Keywords
seismic, in-plane, composites, retrofitting.
Related Book
Other papers in this volume
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