11-02-2013, 11:56 AM
EARTHQUAKE-RESISTANT CONFINED MASONRY CONSTRUCTION
Author: Svetlana Brzev Department of Civil Engineering British Columbia Institute of Technology Burnaby, BC, Canada | Size: 2.5 MB | Format: PDF | Quality: Unspecified | Publisher: NATIONAL INFORMATION CENTER OF EARTHQUAKE ENGINEERING Indian Institute of Technology Kanpur Kanpur (India) | Year: DECEMBER 2007 | pages: 90
This document is written for building professionals interested
in learning more about confined masonry construction and for
those who would like to promote its application in countries
without prior experience related to this construction practice.
Confined masonry has evolved over the last 100 years
through an informal process based on its satisfactory
performance in past earthquakes in countries and regions of
extremely high seismic risk. It is used both for non-engineered
and engineered construction; its field applications range from
one or two storey high single-family dwellings to six storey
apartment buildings. Design and construction provisions for
confined masonry are included in building codes in several
countries.
Building technologies are closely related to local conditions,
and their successful application depends on several factors,
including the availability and cost of building materials, the
skill level of construction labour and the availability of
construction tools and equipment. Introducing new
construction practices, or even improvements in existing ones,
can be daunting tasks. In India and many other countries,
masonry and reinforced concrete (RC) are the technologies of
choice for housing construction, with the design applications
ranging from one-storey family houses to multi-storey
apartment buildings. However, past earthquakes in India and
other countries have revealed weaknesses associated with
both masonry and reinforced concrete frame construction.
Confined masonry offers an alternative to both unreinforced
masonry and RC frame construction for applications in
earthquake-prone areas of the world. The fact that confined
masonry construction looks similar to RC frame construction
with masonry infills and that it uses the same components
(masonry walls and RC confining members) is expected to
assist in an easy transition from the construction perspective.
Confined masonry construction practice does not require new
or advanced construction skills or equipment, but it is
important to emphasize that quality construction and sound
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