1. Vienna Univ. of Technology, Institute of Building Construction and Technology, Karlsplatz 13/2064, 1040 Vienna, Austria.
2. Vienna Univ. of Technology, Institute of Building Construction and Technology, Karlsplatz 13/2064, 1040 Vienna, Austria (corresponding author).
3. Professor, Vienna Univ. of Technology, Institute of Building Construction and Technology, Karlsplatz 13/2064, 1040 Vienna, Austria.