Practical Simplified Computing Method of Natural Vibration Frequency of Cable-stayed Bridge during Construction Stage

DOI

10.2991/msam-18.2018.35How to use a DOI?

Keywords

simplified computing method; cable-stayed bridge; construction stage; natural vibration frequency; double-mass model; estimation formula; finit element method; modal experiment

Abstract

In this paper, the vibration analysis model of the cable-stayed bridge is established by using double-mass method, and the formula for calculating its natural frequency during construction is deduced. On this basis, the formula is simplified to obtain the estimation formula of the natural vibration frequencies of the cable-stayed bridge during construction. The structure analysis software MIDAS Civil is used to establish the three-dimensional finite element model of the cable-stayed bridge of Jinan Qihe Yellow River Bridge to analyze the vibration characteristics of Qihe Yellow River Bridge during the construction stage, carry on the spot tracking of the modal test of the construction phase, and at the same time calculate the frequency by using the double-mass method and the estimation formula. The double-mass vibration model, the natural frequency estimation formula, the finite element method analysis and the field modal test results are compared and analyzed. Both the test results and the calculated results show that the finite element method can accurately simulate the actual force state of the bridge, and the double-mass model and the estimation formula provide a more accurate and efficient method for calculating the natural vibration frequencies, which provides reference for guiding design and construction monitoring work of the cable-stayed bridge.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xingnai Wang
PY  - 2018/07
DA  - 2018/07
TI  - Practical Simplified Computing Method of Natural Vibration Frequency of Cable-stayed Bridge during Construction Stage
BT  - Proceedings of the 2018 3rd International Conference on Modelling, Simulation and Applied Mathematics (MSAM 2018)
PB  - Atlantis Press
SP  - 162
EP  - 167
SN  - 1951-6851
UR  - https://doi.org/10.2991/msam-18.2018.35
DO  - 10.2991/msam-18.2018.35
ID  - Wang2018/07
ER  -