Footbridge Response on Single Pedestrian Induced Vibration Analysis
Footbridge Response on Single Pedestrian Induced Vibration Analysis
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发表时间：
2009-02
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通讯作者：
J. Kala;V. Salajka;P. Hradil
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作者：
J. Kala;V. Salajka;P. Hradil
许多行人天桥的固有频率与行人引起的荷载的主频率一致，因此，在行人引起的动态荷载下，它们有可能遭受过度振动。一些设计标准引入了适用于简单结构的行人荷载模型。另一方面，更复杂结构的载荷建模通常留给设计人员。本文的主要重点是人的诱导力传递到人行桥和这些负载的方式可以被建模用于人行桥的动态设计。介绍了国内外常用规范的设计准则和荷载模型，并进行了比较。利用ANSYS程序系统对捷克科林悬索桥的详细有限元模型进行了动力分析。试图模拟一个人和一群行人施加的荷载，结果产生了位移和加速度，并与正常使用标准进行了比较。关键词-行人天桥，使用性能，行人行为，数值分析。
Many footbridges have natural frequencies that coincide with the dominant frequencies of the pedestrian-induced load and therefore they have a potential to suffer excessive vibrations under dynamic loads induced by pedestrians. Some of the design standards introduce load models for pedestrian loads applicable for simple structures. Load modeling for more complex structures, on the other hand, is most often left to the designer. The main focus of this paper is on the human induced forces transmitted to a footbridge and on the ways these loads can be modeled to be used in the dynamic design of footbridges. Also design criteria and load models proposed by widely used standards were introduced and a comparison was made. The dynamic analysis of the suspension bridge in Kolin in the Czech Republic was performed on detailed FEM model using the ANSYS program system. An attempt to model the load imposed by a single person and a crowd of pedestrians resulted in displacements and accelerations that are compared with serviceability criteria. Keywords—Footbridge, Serviceability, Pedestrian action, Numerical analysis.