DOI: 10.5937/jaes13-7750
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions.
Volume 13 article 329 pages: 187-193
All dynamic
pedestrian load models for serviceability control on pedestrian bridges which
can be found in Eurocodes (EC) or guides to EC are based on dynamic load model
of single pedestrian. Though the model of moving pulsating force is similar to
the real character of pedestrian loading (walking along the bridge) the load
model based on stationary pulsating force acting at the most adverse position
of the bridge deck may be concurrent in bridge design for the reason of
simplicity of acceleration assessment. Pulsating force moving along the bridge
span do not produce the same dynamic response as a same pulsating stationary
force. Therefore, the amplitude of stationary pulsating force have to be
factorised by the reduction factor in a way that both load models (stationary and
moving) cause the same maximum structural dynamic response. In this paper the
structural parameters (structural system, span length, structural frequency and
structural damping) affecting the reduction factor in pedestrian load model
based on stationary pulsating force are researched. From conducted analyses it
can be concluded changes in structural frequency does not affect the reduction
factor, while changes in structural damping, structural system and span length
affect the reduction factor, i.e. reduction factor is not a constant value as
it is defined in load models proposed in some codes or guides.
This paper is a part of
research supported by University of Rijeka through Grant No. 13.05.1.1.01. The
authors are grateful for this support.
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