^pof;
Civil;
Engineering;
and;
Architecture,;
University;
of;
Beira;
Interior,;
Covilha;
6200-001,;
Portugal;
^pof;
Civil;
Engineering;
and;
Architecture,;
IST,;
Technical;
University;
of;
Lisbon,;
Lisbon;
1049-001,;
Portugal;