Modelling of pedestrian-induced load in serviceability limit state analysis of footbridges

The last few decades new trends in the design of pedestrian bridges have resulted lighter and more slender structures. This leads to a reduction natural frequencies increased flexibility, thus greater possibility for structures become exposed excessive vibrations caused by pedestrians. lager amplitudes occur if pace frequency excitation load approaches one footbridge. vibration high proportions may cause pedestrians feel uncomfortable, sick or unsafe while crossing bridge. In modern bridge design, human-induced an important issue. Footbridge vertical, lateral longitudinal direction, torsion deck is also possible. main types action on are walking running, jumping, bouncing, swaying considered be intentional, sometimes even vandal excitation. Pedestrian-induced loads difficult model since different weight, various number groups randomly distributed over deck. Also, velocity vary from pedestrian. models appropriately set up great importance understanding response Principles modeling some characteristic loads, described proposals codes, presented this paper. Some results Serviceability Limit State analysis, terms vibration, Nisava River Nis, presented.