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Submitted on: 15 March 2001.
Revised on: 10 April 2001.
Accepted on: 25 April 2001.
___________________Jordan Journal of Civil Engineering
Submitted on: 23 November 2019.
Revised on: 14 December 2019.
Accepted on: 02 February 2020.
___________________Jordan Journal of Civil Engineering
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Submitted on: 29 October 2003.
Revised on: 20 November 2003.
Accepted on: 08 January 2004.
___________________Jordan Journal of Civil Engineering