Journal of Structural Engineering (BioMonthly): Vol.38 Issue.5 December/2011-Junuary'2112 - USA American Concrete Institute Dec-Jnu'2011-12 - 506PP - 38 . ISSN: 0970-0137 Subjects--Topical Terms: Civil Subjects--Facted Index Terms: JournalStructuralEngineering(BioMonthly):Vol.38 Issue. December/2011-Junuary'2112Civil