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
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.
Allen, D.E., Murray, T. M. (1993) Design criterion due to walking, Engineering Journal, 30(4), 117-129.
Bachnamm, H., et al. (1995) Vibration problems in structures: practical guidelines, Basel: Birkhauser Verlag
Design of footbridges - Human induced Vibration of Steel Structures (HIVOSS), (2008) http://www,stb,rwthaachen,de/projekte/2007/HIVOSS/docs/Footbridge_Background_EN02.pdf , retrieved on October 2nd, 2014.
DIN EN 1991-2/NA, Nationaler Anhang – National festgelegte Parameter – Eurocode 1: Einwirkungen auf Tragwerke – Teil 2: Verkhrslasten auf Brucken, (2012) Berlin: Deutches Insitiut fur Normung
ENV 1995-2: 1997, Eurocode 5: Design of Timber Structures–Part 2: Bridges, (1997) Brussels: European Committee for Standardization
FIB Bulletin 32: Guidelines for the design of footbridges, (2005) Stuttgart: CEB
Footbridges: Assessment of vibrational behaviour of footbridges under pedestrian loading, (2006) SETRA, Association Francaise de Dgenie Civil
Guide to basis of bridge design related to Eurocodes supplemented by practical design - Handbook 4, (2004) Edited by Luca Sanpaolesi and Pietro Croce, Leonardo da Vinci pilot project, Pisa
HRN EN 1990:2011, Eurocode: Basis of structural design (EN 1990:2002+A1:2005+ A1:2005/AC:2010), (2011) Zagreb: Croatian Standard Institute
HRN EN 1991-2:2012, Eurocode 1: Actions on structures - Part 2: Traffic loads on bridges (EN 1991-2:2003+AC:2010), (2012) Zagreb: Croatian Standard Institute
HRN EN 1991-2:2012/NA, Eurocode 1: Actions on structures - Part 2: Traffic loads on bridges - National Annex, (2012) Zagreb: Croatian Standard Institute
HRN EN 1995-2:2013, Eurocode 5: Design of timber structures - Part 2: Bridges (EN 1995-2:2004), (2013) Zagreb: Croatian Standard Institute
HRN ENV 1992-2:2004, Eurocode 2 – Design of concrete structures –Part 2: Concrete bridges (ENV 1992-2:1996), (2004) Zagreb: Croatian Standard Institute
HRN ISO 10137:2008, Bases for design of structures – Serviceability of buildings and walkways against vibration (ISO 13137:2007), (2008) Zagreb: Croatian Standard Institute
Manual for loading and basis of design for road and footbridges (Vejledning til Belastnings- og beregningsgrundlag for vej- og stibroer), (2010) Broer, Vejregel (in Danish)
NA to BS EN 1991-2:2003, UK National Annex to Eurocode 1: Actions on structures – Part 2: Traffic loads on bridges, (2008) BSI
ONORM B 1991-2 Eurocode 1: Actions on structures - Part 2: Traffic loads on bridges - National specifications concerning ONORM EN 1991-2 and national supplements, (2011) Wien: Austrian Standards plus GmbH (in German)
SR EN 1991-2/NB, Eurocode 1: Actions on structures - Part 2: Traffic loads on bridges - National Annex, (2006) Bucharest: Romanian Standards Association (ASRO)
Stimac Grandic, I. (2015) Serviceability Verification of Pedestrian Bridges under Pedestrian Loading, Technical Gazette, 22(2), 527-537.
Stimac, I., Mestrovic, D., Kozar, I. (2004) Analiza
mostovnih konstrukcija pobudjenih pokretnim opterecenjem, Gradjevinar, 56(6), 347–353.