Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
An experimental investigation of the fire behaviour of demountable composite beams with profiled steel decking
Abstract This paper presents the results of a detailed experimental investigation of the fire behaviour of prefabricated demountable composite beams (PDCBs) with bolted shear connectors. Four full–scale standard fire resistance tests were conducted to evaluate the performance of PDCBs with varying degrees of shear connection (65% and 33%) at ambient temperature and different durations of fire exposure (without fire protection and with fire protection to achieve a nominal 60 min’ fire resistance). The experimental results indicate that the Eurocode 4 Part 1.2 simplified approximations to obtain equivalent shear stud and concrete temperatures for the calculation of shear connector resistance in fire are still applicable to demountable shear connectors for different fire exposure durations despite different heat transfer conditions from conventional welded shear connectors. The lower shear connector and concrete temperatures enable the shear connector to enhance its relative resistance to the steel section that has much higher temperatures, thereby greatly increasing the degree of shear connection in fire design. The design calculation method in Eurocode EN1994–1-2 can be applied to composite beams with demountable shear connectors. The experimental observations also confirm that the concrete grouting between different composite slab segments performed well.
Highlights The demountable composite beams can be considered to have similar behaviour as conventional composite beams with welded shear studs in fire. The simplified shear connector and concrete temperatures in EN 1994-1-2 for welded shear studs are applicable to demountable bolted shear connectors. The plastic design method for composite beams with welded shear studs can also be used for composite beams with demountable bolted shear connectors.
An experimental investigation of the fire behaviour of demountable composite beams with profiled steel decking
Abstract This paper presents the results of a detailed experimental investigation of the fire behaviour of prefabricated demountable composite beams (PDCBs) with bolted shear connectors. Four full–scale standard fire resistance tests were conducted to evaluate the performance of PDCBs with varying degrees of shear connection (65% and 33%) at ambient temperature and different durations of fire exposure (without fire protection and with fire protection to achieve a nominal 60 min’ fire resistance). The experimental results indicate that the Eurocode 4 Part 1.2 simplified approximations to obtain equivalent shear stud and concrete temperatures for the calculation of shear connector resistance in fire are still applicable to demountable shear connectors for different fire exposure durations despite different heat transfer conditions from conventional welded shear connectors. The lower shear connector and concrete temperatures enable the shear connector to enhance its relative resistance to the steel section that has much higher temperatures, thereby greatly increasing the degree of shear connection in fire design. The design calculation method in Eurocode EN1994–1-2 can be applied to composite beams with demountable shear connectors. The experimental observations also confirm that the concrete grouting between different composite slab segments performed well.
Highlights The demountable composite beams can be considered to have similar behaviour as conventional composite beams with welded shear studs in fire. The simplified shear connector and concrete temperatures in EN 1994-1-2 for welded shear studs are applicable to demountable bolted shear connectors. The plastic design method for composite beams with welded shear studs can also be used for composite beams with demountable bolted shear connectors.
An experimental investigation of the fire behaviour of demountable composite beams with profiled steel decking
Long, Jiejie (Autor:in) / Wang, Yongchang (Autor:in) / Lou, Guobiao (Autor:in) / Hu, Zhiyou (Autor:in) / Yang, Tao (Autor:in) / Tan, Qinghua (Autor:in) / Ke, Lu (Autor:in)
Engineering Structures ; 307
25.03.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| BASE | 2024
Experimental study on demountable shear connectors in composite slabs with profiled decking
| British Library Online Contents | 2016
Experimental study on demountable shear connectors in composite slabs with profiled decking
| Online Contents | 2016