Probabilistic criteria for lateral dynamic stability of bridges under crowd loading

被引：23
作者：
Bocian, M. [1 ,2 ]
Macdonald, J. H. G. [1 ]
Burn, J. F. [2 ]
机构：
[1] Univ Bristol, Dept Civil Engn, Bristol BS8 1TR, Avon, England
[2] Univ Bristol, Dept Mech Engn, Bristol BS8 1TR, Avon, England
来源：
COMPUTERS & STRUCTURES | 2014年 / 136卷
基金：
英国工程与自然科学研究理事会;
关键词：
Bridges; Human-structure interaction; Biomechanics; Inverted pendulum model; Lateral vibrations; Dynamic instability; INDUCED VIBRATION; FOOTBRIDGES; EXCITATION; BALANCE; FORCES; MODEL;
D O I：
10.1016/j.compstruc.2014.02.003
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Probabilistic conditions for lateral stability of bridges are proposed, based on output from the inverted pendulum pedestrian model from the field of biomechanics. Statistical variations of the parameters defining the model are studied based on real statistical data of the English population. Variability of the self-excited forces is quantified for crowds of different velocities and critical conditions are identified for bridge natural frequencies below 5 Hz. Allowance is made for the influence of the bridge mode shape and number of pedestrians in the crowd and their spatial distribution. This allows realistic worst case conditions among different loading scenarios for a particular structure to be found. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：108 / 119
页数：12
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