Dynamic Performance Simulation of Long-Span Bridge under Combined Loads of Stochastic Traffic and Wind

Modeling stochastic live load for long-span bridge based on microscopic traffic flow simulation

“…Value Definition significant dynamic impacts on the bridge from the vehicles [28]. So for a critical long-span bridge which often experiences busy traffic, the results confirm that a realistic simulation of traffic flow with appropriate traffic rules is necessary in order to rationally quantify the time-dependent live loads from traffic.…”

Probabilistic dynamic behavior of a long-span bridge under extreme events

“…the driving lanes are the same for both the connecting roadways and the bridge) was introduced in Refs. [4,12,14]. Following a brief introduction of the CA-based traffic simulation for the normal case [4,15,16], the traffic flow simulation for the ''blockage'' situation of the ''roadway-bridge-roadway'' will be developed in the following.…”

“…accidents and associated lane-blockage) can be replicated with the simulated traffic flow [4]. Based on the CA-based traffic flow simulation, Chen and Wu [12] further developed a general bridge dynamic performance analytical model considering stochastic traffic and wind excitations under normal situations. After developing the analytical framework of the Bridge/Traffic/Wind coupled system, the writers also conducted numerical studies of a prototype long-span bridge under moderate wind and normal traffic flow [12].…”

“…By applying the general Bridge/Traffic/Wind coupled analysis methodology developed by the writers in the previous work [12], the present study focuses on (1) conducting the CA-based traffic flow simulation of a long-span bridge and connecting roadways under incidental situations, (2) defining representative scenarios for the extreme events, and (3) numerically studying the bridge performance under these possible extreme events. Through carrying out the studies on a comprehensive set of typical scenarios, it is anticipated that better understanding of extreme events of longspan bridges from the design perspectives of strength and serviceability can be achieved, which may eventually contribute to the future design specification for long-span bridges.…”

Recent researches on disaster prevention and mitigation in civil engineering

“…A new "semi deterministic" bridge dynamic analytical model in consideration of the dynamic interactions between the bridge, wind, and stochastic traffic was proposed. As a result of adopting the new analytical model, the long-span bridge dynamic behavior can be statistically predicted with a more realistic and adaptive consideration of combined loads of traffic and wind [10].…”