Probabilistic Assessment of Human Response to Footbridge Vibration
Probabilistic Assessment of Human Response to Footbridge Vibration
复制标题
DOI：
10.1260/0263-0923.28.4.255
复制
发表时间：
2009-12
期刊：
影响因子：
--
通讯作者：
S. Z̆ivanović;Aleksandar Pavia
中科院分区：
文献类型：
--
作者：
S. Z̆ivanović;Aleksandar Pavia
现代人行天桥由于更苛刻的美学要求和结构材料强度的增加而变得越来越细长。因此，它们可能会遭受过度的振动下，混凝土引起的动态负载，因此有其振动的可用性受损。为了可靠地评估桥梁用户对振动的可接受性，有必要定义行人的主观振动限制--在振动表面上移动而不是静止的人类振动接收者。本文的目的是开发一种方法来定义行走的人的振动限制。为此，对一座活跃的箱形梁人行桥上的大量行人流量进行了监测。在采访了100名随机选择的行人，他们的主观评价的振动感觉在交叉显着的变化，主观评价的振动观察。为了解释这种可变性，在概率意义上定义了步行者的振动极限。所界定的限制可用于估计会抱怨行人天桥过于热闹的人的百分比。
Modern pedestrian bridges are becoming increasingly slender due to more demanding aesthetic requirements and increased strength of structural materials. As a consequence, they might suffer from excessive vibration under pedestrian-induced dynamic loading and therefore have their vibration serviceability compromised. For a reliable assessment of acceptability of vibrations to bridge users, it is necessary to define subjective vibration limits for pedestrians – human vibration receivers who are moving across a vibrating surface, rather than being stationary. This paper aims to develop a methodology for defining vibration limits for walking humans. For this, substantial pedestrian traffic across a lively box girder footbridge was monitored. After interviewing 100 randomly chosen pedestrians about their subjective assessment of the vibration felt during the crossing significant variability in subjective rating of vibrations was observed. To account for this variability, the vibration limit for walking people was defined in a probabilistic sense. The limit defined allows for estimating the percentage of people who would complain about footbridge liveliness.