http://reply.papertrans.cn/2/150/14935/14935-31.png
Submitted on: 17 March 1998.
Revised on: 20 April 1998.
Accepted on: 19 June 1998.
___________________Jordan Journal of Civil Engineering
http://reply.papertrans.cn/2/150/14935/14935-33.png
Submitted on: 15 July 2006.
Revised on: 17 August 2006.
Accepted on: 01 September 2006.
___________________Jordan Journal of Civil Engineering
Submitted on: 17 October 2011.
Revised on: 04 December 2011.
Accepted on: 13 January 2012.
___________________Jordan Journal of Civil Engineering
Submitted on: 09 March 1999.
Revised on: 30 May 1999.
Accepted on: 07 July 1999.
___________________Jordan Journal of Civil Engineering