TY - JOUR N2 - In the paper the results of experimental investigations concerning flat slabs made from reinforced lightweight concrete with sintered fly ash aggregate CERTYD were presented. In the research program 6 models made in a natural scale were included. The main variable parameter was slab longitudinal reinforcement ratio. The aim of investigation was the experimental verification of efficiency of double-headed studs as punching shear reinforcement. In the existing technical approvals such kind of reinforcement was allowed only in normal concrete slabs. It was demonstrated that double-headed studs can be an effective transverse reinforcement of lightweight aggregate concrete slabs. The use of double-headed studs resulted in increase in the ultimate load from 19% to 44%, depending on the slab reinforcement ratio which ranged from 0.5% to 1.2%. The comparative analysis showed that the Eurocode 2 provisions were conservative in relation to the experimental results, which were on average 42% higher than the theoretical ones however with a very low 7% coefficient of variation. L1 - http://journals.pan.pl/Content/115625/PDF-MASTER/18_ace-2018-0058.pdf L2 - http://journals.pan.pl/Content/115625 PY - 2018 IS - No 4/I EP - 306 KW - punching shear KW - lightweight aggregate concrete KW - fly ash KW - shear stress KW - double-headed studs A1 - Gołdyn, M. A1 - Krawczyk, Ł. A1 - Ryżyński, W. A1 - Urban, T. PB - WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES VL - Vol. 64 DA - 15.12.2018 T1 - Experimental investigations on punching shear of flat slabs made from lightweight aggregate concrete SP - 293 UR - http://journals.pan.pl/dlibra/publication/edition/115625 T2 - Archives of Civil Engineering ER -