Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Response of unbonded prestressed concrete continuous slabs under fire exposure
Highlights Factors governing fire response of prestressed concrete slabs is quantified. Effect of prestressing on fire induced concrete spalling in slabs is discussed. Role of fire induced secondary moments on response of continuous slabs is discussed. An approach to enhance fire response of slabs through rebar layout is proposed.
Abstract Results from fire resistance experiments on nine unbonded prestressed concrete (PC) continuous slabs are presented in this paper. The test variables included concrete cover thickness, load level, effective prestress and degree of prestressing. Data from the experiments are utilized to study the effect of critical parameters on thermal and structural response of unbonded PC continuous slabs. Test results show that concrete cover thickness, load level and fire induced secondary moments have significant influence on the fire resistance of unbonded PC continuous slabs. Fire induced concrete spalling occurred in three continuous slabs and this led to failure of two slabs. Data from fire tests indicate that the degree of prestressing has significant influence on the extent of concrete spalling and the extent of spalling increase with higher degree of prestressing. Results from fire tests are utilized to recommend better reinforcement layout for enhancing fire performance of PC continuous slabs.
Response of unbonded prestressed concrete continuous slabs under fire exposure
Highlights Factors governing fire response of prestressed concrete slabs is quantified. Effect of prestressing on fire induced concrete spalling in slabs is discussed. Role of fire induced secondary moments on response of continuous slabs is discussed. An approach to enhance fire response of slabs through rebar layout is proposed.
Abstract Results from fire resistance experiments on nine unbonded prestressed concrete (PC) continuous slabs are presented in this paper. The test variables included concrete cover thickness, load level, effective prestress and degree of prestressing. Data from the experiments are utilized to study the effect of critical parameters on thermal and structural response of unbonded PC continuous slabs. Test results show that concrete cover thickness, load level and fire induced secondary moments have significant influence on the fire resistance of unbonded PC continuous slabs. Fire induced concrete spalling occurred in three continuous slabs and this led to failure of two slabs. Data from fire tests indicate that the degree of prestressing has significant influence on the extent of concrete spalling and the extent of spalling increase with higher degree of prestressing. Results from fire tests are utilized to recommend better reinforcement layout for enhancing fire performance of PC continuous slabs.
Response of unbonded prestressed concrete continuous slabs under fire exposure
Hou, Xiaomeng (Autor:in) / Zheng, Wenzhong (Autor:in) / V.K.R., Kodur (Autor:in)
Engineering Structures ; 56 ; 2139-2148
28.08.2013
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Response of unbonded prestressed concrete continuous slabs under fire exposure
| Online Contents | 2013
| British Library Online Contents | 2013