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Submitted on: 16 June 1998.
Revised on: 19 July 1998.
Accepted on: 30 August 1998.
___________________Archives of Civil and Mechanical Engineering
Submitted on: 23 August 2009.
Revised on: 15 October 2009.
Accepted on: 23 November 2009.
___________________Archives of Civil and Mechanical Engineering
Submitted on: 08 January 2019.
Revised on: 23 April 2019.
Accepted on: 09 June 2019.
___________________Archives of Civil and Mechanical Engineering
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