Experimental research on the wind-induced vibration of stay cables with lighting fixtures
DENG Zhouquan1，TANG Haojun1，LI Yongle1，HUANG Jing2，WANG Yichao1，LIN Taiyi2
1.School of Bridge Engineering,Southwest Jiaotong University, Chengdu 610031, China;
2.Yibin Urban and Traffic Engineering Construction Group Co., Ltd., Yibin 644000, China
In order to decorate cities' night view, it has become a trend to install lighting fixtures on the existing long-span cable-stayed bridge.But, the installation of lighting fixtures will significantly change the aerodynamic shape of stay cables, affecting the structural aerodynamic stability.In order to ensure the safety and durability of bridges, the wind resistance of a stayed cable installed with lighting fixtures was studied bymeans of wind tunnel tests, and the influence of the lighting fixtures on the existing stay cable was evaluated.Taking three different diameter stay cables as the research object, wind tunnel tests for force and vibration measurement were carried out around a segment model with a scale ratio of 1∶1.The experimental results show that the presence of lighting fixtures will significantly change the aerodynamic shape of stay cables, increasing the frequency of vortex shedding at the leeward side, so that stay cables have the possibility of vortex-induced resonance at a lower inflow wind speed.In addition, the influence of lighting fixtures on the rain vibration of stay cables is finite, and it has a certain inhibitory effect on dry galloping.
邓周全1，唐浩俊1，李永乐1，黄静2，王义超1，林太乙2. 亮化灯具对既有斜拉索风致振动影响的试验研究[J]. 振动与冲击, 2020, 39(6): 44-50.
DENG Zhouquan1，TANG Haojun1，LI Yongle1，HUANG Jing2，WANG Yichao1，LIN Taiyi2. Experimental research on the wind-induced vibration of stay cables with lighting fixtures. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(6): 44-50.
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