Submitted on: 18 January 2002.
Revised on: 28 February 2002.
Accepted on: 16 March 2002.
___________________Bulletin of Earthquake Engineering
Submitted on: 31 October 2008.
Revised on: 10 January 2009.
Accepted on: 31 January 2009.
___________________Bulletin of Earthquake Engineering
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Submitted on: 18 November 2001.
Revised on: 15 February 2002.
Accepted on: 22 March 2002.
___________________Bulletin of Earthquake Engineering
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