Abstract：In order to study effects of parameters on nonlinear aerostatic stability of a long-span pedestrian suspension bridge, using the double-iteration numerical algorithm, effects of parameters including structural additional wind attack angle, initial wind attack angle of incoming flow, wind loads of non-main girder structures, wind resistance cable and central buckle structure measures on nonlinear aerostatic stability for a pedestrian suspension bridge with main span of 420m were analyzed. The analysis results showed that regardless of additional wind attack angle enlarging the critical wind speed of aerostatic instability, different development paths of aerostatic loads under different positive and negative initial attack angles make the positive attack angle worsen the aerostatic stability and the negative attack angle improve the aerostatic stability; wind loads of non-main girder structure have little effect on the critical wind speed of aerostatic instability, while wind load of wind resistance cable has great effects on displacements under static wind of main girder, wind load of main tower has the least effect on displacements under static wind of main girder; wind resistance cable can change aerostatic instability status of a long-span pedestrian suspension bridge and greatly improve its aerostatic stability; for a pedestrian suspension bridge with main span of 420m, it is difficult to only depend on central buckle structure measures for the design scheme without wind resistance cable to get sufficient aerostatic stability.
管青海1，周燕1，李加武2，胡兆同2，刘健新2. 主跨420m人行悬索桥非线性静风稳定影响参数分析[J]. 振动与冲击, 2018, 37(9): 155-160.
GUAN Qing-hai1，ZHOU Yan1， LI Jia-wu2，HU Zhao-tong2，LIU Jian-xin 2. Effects of parameters on nonlinear aerostatic stability of a pedestrian suspension bridge with main span of 420m. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(9): 155-160.
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