Go to Home Page           Conservationtech.com, Building Conservation Technology

Powered by Translate

 

SITE INDEX | BASE-ISOLATED HOUSE PROJECT | PUBLICATIONS | PHOTOGRAPHS | EXHIBITIONS | RESUME & CONTACT INFO | Site info

 

ARMATURE CROSSWALL PROJECT

An Earthquake Hazard Mitigation Proposal for Vulnerable Reinforced Concrete Buildings
based on the Performance of Traditional Timber and Masonry Infill-wall Construction


In a number of recent earthquakes, large numbers of people have died in the complete collapse of buildings constructed with reinforced concrete frames and infill walls of masonry while nearby, many much older buildings of weak mud, brick, and timber buildings managed to withstand the same shaking. Here Randolph Langenbach describes how certain examples of traditional construction of brick and timber in Turkey and in other countries have demonstrated good resistance to earthquakes which have destroyed contemporary buildings of reinforced concrete.  “Armature Crosswalls,” which are based on traditional infill-wall construction, are designed to address the problems in reinforced concrete structures by changing the standard construction of the infill walls to increase the building’s flexibility and energy dissipation, rather than by adding to the strength and stiffness of the walls. To accomplish this, the infill walls will be constructed or retrofitted with an “armature” of studs and crossbeams that subdivide the masonry into a series of panels, and the masonry panels themselves will be constructed with softer and weaker lime mortar, rather than strong, but brittle, cement mortar.


 

1) Description of research project (pdf icon:24kb)

(c) Randolph Langenbach, 2005


PUBLISHED PAPERS on the subject of Armature Crosswalls:
(in reverse chronological order)

(1)

pdf icon2008, Learning from the Past to Protect the Future: Armature Crosswalls,
Engineering Structures
, Elsevier. Vol. 30, No. 8, August 2008, pp 2096-2100


pdf icon2006, ARMATURE CROSSWALLS:
A Proposed Methodology to Improve the
Seismic Performance of Non-ductile Reinforced Concrete Infill Frame Structures
,
8th U.S. National Conference on Earthquake Engineering (8NCEE), San Francisco 1906 anniversary, 2006.

by Randolph Langenbach, Khalid Mosalam, Sinan Akarsu, Alberto Dusi

For further information on Portuguese "Gaiola" Construction:
PHOTO ESSAY
: Pombalino "Gaiola" Construction
revealed during renovation work in Lisbon, Portugal, January, 2003.


(2)
pdf icon2005 ARMATURE CROSSWALLS,
How pre-modern construction practices
may hold the key to avoiding the collapse of vulnerable urban housing blocks
,
Joint US-India Symposium on Urban Housing and Infrastructure in New Delhi, October, 2005.
by Randolph Langenbach


(3)

pdf icon 2003 CROSSWALLS" INSTEAD OF SHEARWALLS:
A Proposed Research Project for the Retrofit of Vulnerable Reinforced Concrete
Buildings in Earthquake Areas based on Traditional
Hımış Construction,

Proceedings of the Turkish Fifth National Conference on Earthquake Engineering, Istanbul, 26-30 May, 2003
.  (1.6 MG)
by Randolph Langenbach

 



 

HOME PAGE | SITE INDEX | BASE-ISOLATED HOUSE PROJECT | PUBLICATIONS | PHOTOGRAPHS | EXHIBITIONS | RESUME & CONTACT INFO | Site info

Website by

© Randolph Langenbach

M-Arch (Harvard), Dipl.Conservation (York, England)

Please note:  As of June, 2014, this is a new address for mail from website-users.
If you have not heard from me at my old address, please write again.

Writings and photographs found on this website is ©Randolph Langenbach and other authors. For use permission, write to the address above.

Please send your reactions, comments or questions regarding this website to the Email address above