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Submitted on: 27 January 2011.
Revised on: 27 May 2011.
Accepted on: 24 June 2011.
___________________JOURNAL OF COMPUTING IN CIVIL ENGINEERING
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Submitted on: 02 September 2014.
Revised on: 27 September 2014.
Accepted on: 12 November 2014.
___________________JOURNAL OF COMPUTING IN CIVIL ENGINEERING