http://reply.papertrans.cn/2/127/12617/12617-11.png
http://reply.papertrans.cn/2/127/12617/12617-12.png
http://reply.papertrans.cn/2/127/12617/12617-13.png
http://reply.papertrans.cn/2/127/12617/12617-14.png
Submitted on: 24 January 2009.
Revised on: 16 March 2009.
Accepted on: 04 April 2009.
___________________Ingegneria Sismica---PATRON EDITORE S R L
http://reply.papertrans.cn/2/127/12617/12617-16.png
Submitted on: 29 April 2010.
Revised on: 20 July 2010.
Accepted on: 25 August 2010.
___________________Ingegneria Sismica---PATRON EDITORE S R L
http://reply.papertrans.cn/2/127/12617/12617-18.png
Submitted on: 16 December 1998.
Revised on: 11 April 1999.
Accepted on: 24 April 1999.
___________________Ingegneria Sismica---PATRON EDITORE S R L
Submitted on: 28 June 2000.
Revised on: 16 October 2000.
Accepted on: 29 November 2000.
___________________Ingegneria Sismica---PATRON EDITORE S R L