Eurocode Pedestrian Loading

Selected Applications

Curved girder analysis	Linear and nonlinear buckling	Integral abutment bridges
Staged construction analysis	Concrete modelling	Post-tensioning
Eurocode Pedestrian Loading

Eurocode Pedestrian Loading

Simplifies and automates pedestrian load generation to the UK national annex
Generates all loadcases to model the passage of pedestrian groups
Results can be printed and exported to spreadsheets or graphed

The pedestrian load wizard provides the means to apply vertical oscillating pedestrian loading to a LUSAS bridge model in accordance with the UK national annex to BS EN 1991-2 2003. It simplifies and automates the creation of the numerous loadcases required to correctly model the passage of pedestrian groups across a structure. After running a dynamic analysis, results and particularly graphs can be readily created to investigate the acceleration / time response for any node on the structure.

Modelling

After first carrying out an eigen analysis to derive the key fundamental mode shapes and frequencies, a dynamic analysis is then undertaken to model the behaviour of the structure to a moving and pulsating pedestrian load. As a result, both SI units (N,m,kg,s,C) and Rayleigh damping parameters must be specified to correctly represent the damping behaviour of the materials / structure. Prior to running the wizard a straight line, arc or spline which represents the path of the pedestrian loading must be defined and selected on the model.

Pedestrian Load Wizard

On the moving loading dialog the specification of Bridge classes (A, B, C or D) and Pedestrian types (walking or joging/running) control the reference load and speed of the moving pulsating load representing the pedestrian or pedestrian group. Based on the selection of bridge class and pedestrian type the recommended group size from Table 7 of the UK National Annex is set in the dialog. The Vertical natural frequency governs the frequency of the pulsating pedestrian load and it is also required for the manual determination of the Pedestrian Combined factor from Figure 8 of the UK National Annex to deal with the effects of a more realistic pedestrian population, the harmonic responses and the relative weighting of pedestrian sensitivity to response. The Unsynchronized reduction factor which is dependent upon both the effective span and structural damping should be obtained manually from Figure 9 of the UK National Annex. Pedestrian path options control the direction of the pedestrian movement and the time step /incremental distance for each stage of the analysis. Both forward and reverse moving loading is possible. Graphs of loading can be automatically created.

Viewing results

Results can be printed and exported to spreadsheets or graphed using standard graphing facilities to assess, for example, the acceleration or displacement at a selected node against time.

Typical acceleration response graph for a selected position on a bridge deck

Any modelling and analysis capabilities described on this page are dependent upon the LUSAS software product and version in use.