Dynamic Characterization of a Stress Ribbon and Butterfly Arch Pedestrian Bridge Using Wireless Measurements
For their aesthetic values, both arches and stress-ribbon decks are widely used in design of pedestrian bridges. The combination of the two systems provides the solution of a self-anchored structure. In the current paper, the dynamic characteristics of a short-span stress ribbon and butterfly arch bridge are investigated by means of operational modal analysis. Ambient vibration of the bridge is recorded by using several highly-synchronous three-axial wireless accelerometers deployed on the bridge deck. Modal parameters, including natural frequencies, mode shapes and damping ratios are extracted from the measurements. By comparing the experimental modal results to their numerical counterparts obtained from a preliminary finite element model, interesting results are found both related to the flexibility of the whole system and the stiffness contribution of the non-structural elements. The findings also serve as the basis of the serviceability assessment of the pedestrian bridge.
KeywordsStress-ribbon Butterfly arch Pedestrian bridge Operational modal analysis
Prof. Guido De Roeck is acknowledged for his guidance during the first author’s post-doctoral research period at KU Leuven and Dr. Edwin Reynders for his instruction with the identification software MACEC. The financial supports from the Fuzhou municipal city under the research project “2017-G-67” and the Fuzhou University under the research project “XRC-1675” are also acknowledged.
- 1.Strasky, J.: Stress-Ribbon pedestrian bridges supported by arches. Concrete Int. 32(5), 28–33 (2010)Google Scholar
- 2.Chen, B., Lin, H., Wang, Y.: Design of a landscape pedestrian bridge located in the central axis of Qishan campus of Fuzhou University. Natl. Int. Highway 34(5), 115–118 (2014). (in Chinese)Google Scholar
- 3.Feldman, M.: HiVOSS—human-induced vibrations of steel structures. Office for Official Publications of the European Communities, Luxembourg (2008)Google Scholar
- 5.GeoSIG Homepage. https://www.geosig.com/. Accessed 04 Apr 2019
- 7.Zordan, T., Briseghella, B., Liu, T.: Finite element model updating of a tied-arch bridge using Douglas-Reid method and Rosenbrock optimization algorithm. J. Traffic Transp. Eng. 1(4), 280–292 (2014). (in English)Google Scholar
- 9.Reynders, E., Schevenels, M., De Roeck, G.: MACEC 3.3: a Matlab toolbox for experimental and operational modal analysis. KU Leuven, Belgium (2014)Google Scholar
- 10.Ni, Z.: Design of a landscape pedestrian bridge in the Qishan campus of Fuzhou University. In: Proceedings of the National Conference of China Highway and Transportation Society, Zhuhai, pp. 129–133 (2014). (in Chinese)Google Scholar