Advances in architectural, civil and environmental engineering : 30th annual PhD student conference on applied mathematics, applied mechanics, building technology, geodesy and cartography, landscaping, theory and environmetal technology of buildings, theory and structures of buildings, theory and structures of civil engineering works, water resources engineering : October 14th 2020, Bratislava, Slovakia. (Spektrum STU Slovenská technická univerzita v Bratislave, 2020)