Cross-laminated timber (CLT) floor serviceability under multi-person loading: Impact of beam–panel connections

•Exploring the effect of screw size on the mechanical properties of the steel beam–CLT panel connection.•Investigating the effect of screw size and spacing on the vibration serviceability of the CLT floor by numerical simulation using OpenSees.•Reducing the screw spacing from 1400 mm to 181 mm produced a 38.3% decrease in VDV.•Proposing a theoretical model to predict the fundamental natural frequency and a design method to predict the VDV of the CLT floor.