Open AccessMechanical characteristics and comfort evaluation under pedestrian vertical excitation of a thin-walled cold-formed steel footbridge
Author(s) -
Jing Xu,
Xijun Chen,
Jing Li,
Zeyu Li
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1028/1/012008
Subject(s) - pedestrian , structural engineering , natural frequency , finite element method , rigidity (electromagnetism) , bridge (graph theory) , flexural strength , engineering , flexural rigidity , acceleration , civil engineering , computer science , acoustics , vibration , physics , medicine , classical mechanics
Thin-walled cold-formed steel (TWCFS) structures have a great application prospect and are widely adopted in low-rise residential constructions due to great mechanical and economical properties. Since TWCFS member has low flexural rigidity and is hard to weld, it is rarely used in bridge engineering. In Poyang Lake Wetland of Jiangxi Province, China, a TWCFS footbridge was built. In this paper, Serial tests including static loading test, natural frequency test and pedestrian comfort test were conducted. At the same time, finite element analysis (FEA) models were built with Midas/Civil software. The data shows that although natural frequency is far greater than the range of pedestrian walking frequency and will not lead to the resonance of bridge, the peak acceleration under crowd load reflects poor pedestrian comfort. The structure was modified for improving pedestrian comfort and the results after modification verify that the comfort can be ensured.