Mechanical Properties of Shear Stud during and after Fire

An experimental study on the behaviour and design of shear connectors embedded in solid slabs at elevated temperatures

“…Similar failure modes were observed in the tests conducted by other researchers, e.g. [15,16,18], at both ambient and elevated temperatures. It is worth pointing out that concrete failure could still occur in composite systems where the concrete is weaker than the shear connectors, as for example observed by Ollgaard et al [5] at ambient temperatures.…”

“…Comparisons between the experimental results and shear connectors' resistance predicted using the empirical equations recommended in EC4 [23] are presented in Table 5 for the tests described in this paper, and in Table 6 considering the other experimental results reported in references [15,16,18]. As the temperatures on the shear connectors at 5 mm from their base were not measured in the tests by Imagawa et al [18] and Choi et al [16], the stud temperatures related to their experiments (and reported in Table 6) were calculated to be 80% of the steel top flange temperature (in°C) according to EC4 guidelines [23].…”

“…As the temperatures on the shear connectors at 5 mm from their base were not measured in the tests by Imagawa et al [18] and Choi et al [16], the stud temperatures related to their experiments (and reported in Table 6) were calculated to be 80% of the steel top flange temperature (in°C) according to EC4 guidelines [23].…”

“…Mirza et al [17] conducted a number of push-out tests with shear studs embedded in both solid and composite slabs. Imagawa et al [18] performed static push-out tests to evaluate the behaviour of shear studs during and after a fire. In this study, fatigue push-out tests were also performed after the heating process.…”

Mindestverdübelung von Verbundträgern im Brandfall

“…Pfenning, S. Brunkhorst, M. Mensinger, J. Zehfuß: Minimum degree of shear connection of composite beams in fireFachthemenDübelfuß und stimmt gut mit den Angaben zur Tragfähigkeit der Dübel bei Brand in[3,24] überein (Bilder 10, 11).Das numerische Modell zur Verifikation der Dübelkennlinie bei erhöhten Temperaturen wurde an den in[13,25] zu findenden Angaben kalibriert. Das Vorgehen wird ausführlich in [1] diskutiert.…”