Research on Parametric Vibration of a Steel Truss Corridor under Pedestrians Excitation Considering the Time-Delay Effect

With the development of Steel Truss Corridor (STC) toward long-span and gentle development, human-induced vibration often causes large lateral problems time-delay effects STC, which will have a non-negligible impact on dynamic performance STC. In this paper, parametric model proposed by Piccardo is improved, nonlinear equation STC established considering longitudinal–lateral walking force coupled with effect. Taking Millennium as an example, mechanism under effect discussed numerical calculation method, influence its response analyzed. The results show that: effect, when frequency ratio θ/2Ω = 1, value coefficient has no critical number STCs in resonance region. As moves away from more significant When begins to excite phenomenon, existence change time for reach stable amplitude suppress generates vibration, For both nonparametric region region, there pair staggered bifurcation coefficients, increase or decrease response.