- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LI Yongle, PAN Junzhi, TI Zilong, RAO Gang. Inversion Method of Vortex-Induced Vibration Amplitude for Long-Span Bridges with Partially Installed Noise Barrier[J]. Journal of Southwest Jiaotong University, 2023, 58(1): 183-190. doi: 10.3969/j.issn.0258-2724.20210172
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The sectional model test in wind tunnels is often used to measure the vortex-induced vibration (VIV) of long-span bridges. Since the sectional model test is based on two-dimensional theory, when the bridge has different aerodynamic configurations along the span due to the partial installation of noise barriers, it is difficult to measure the VIV response directly through the sectional model test. Based on the empirical linear VIV model, an assessment method of VIV between the sectional model and prototype bridge that considers the effects of multiple aerodynamic configurations is proposed. Firstly, the sectional model test is performed on the models with and without barriers respectively. Then, the prototype response of the noise barriers installed and not installed along the span is investigated by ANSYS harmonic analysis, and the corresponding amplitude of the vortex-induced force is obtained. Finally, according to the actual installation position of the noise barrier along the span, the vortex-induced force is imposed on the bridge and the prototype response with the partially installed noise barrier is obtained. In addition, based on the method in this paper, various noise barrier installation schemes are numerically simulated. The results indicate that fully enclosed noise barrier will significantly reduce the aerodynamic performance of the main girder and the overall VIV will be affected by partial installation of barrier to a large degree. The method in this paper can estimate the prototype response of multi-aerodynamic configurations bridges through the results of sectional model tests. The installation of the noise barrier should be arranged on the side span as far as possible under the conditions of noise reduction. If the arrangement length exceeds the position of the bridge tower, it should be shortened as much as possible to reduce the vortex-induced response.
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