Theoretical study of human-structure interaction during crowd jumping

Resumo

This study presents a time-domain model for crowd-structure interaction in which each jumper is represented as an individual spring-mass-damper system coupled to a rectangular plate. The formulation accounts for contact loss during jumping and enables independent control of the dynamic force generated by each participant. Numerical simulations on a simply supported plate investigated two factors affecting the dynamic response: passive interaction and frequency detuning. Results showed that increasing the number of passive jumpers reduces plate accelerations due to lower energy input, while detuning decreases the overall response but can introduce additional resonance peaks related to structural harmonics. The findings demonstrate that both the proportion of passive or detuned individuals and the detuning magnitude are key parameters influencing vibration serviceability, and that the proposed model effectively captures individual-level interaction effects.