Creep behavior of Grade 10.9 high-strength bolts under and after fire

•Experimentswere conducted on creep behaviour of Grade 10.9 high-strength bolts under and after fire.•The Field & Field model is calibrated for simulating creep behavior of high-strength bolts at elevated temperatures.•The temperature, load ratio and loading duration are key factors affecting the creep behavior of T-stub connections.•High-strength bolts have more obvious creep deformation at high temperatures than high-strength steels.•A reduction factor is recommended to consider the creep effect on determining strength of T-stub connections in Eurocode 3.