Thermomechanical behavior of Glulam-beam connected to CLT-wall assemblies with steel doweled connections before, during and after fire

Purpose Thermomechanical behavior of intermediate-size beam-to-wall assemblies including Glulam-beams connected to cross-laminated timber (CLT) walls with T-shape steel doweled connections was investigated at ambient temperature (AT) and after during non-standard fire exposure. Design/methodology/approach Three AT tests were conducted evaluate the load-carrying capacity failure modes assembly room temperature. Two post-fire performance (PFP) performed study impact 30-min (PFP30) 60-min (PFP60) partial exposure a on residual strength assemblies. The exposed in custom-designed frame, then cooled loaded failure. A (FP) test resistance (FR) by simultaneously applying mechanical load equal 65% carrying capacity. Findings At AT, embedment dowels followed splitting Glulam-beam tensile epoxy between layers CLT-walls dominant modes. In both PFP tests, plastic bending only observed mode. reduced 14% 30 min 37% 60 During FP test, contact major mode, maximum rate displacement 51 into Originality/value This is first time that thermomechanical such an full-contact connection presented.