Abstract：In order to study the dynamic response of cable-stayed bridge induced by the water hammer action in the large-scale water pipeline laid on the bridge, a single-tower cable-stayed bridge was investigated, and the dynamic effect of pipeline was simplified as the dynamic loading. By establishing the pipeline water hammer calculation model and bridge dynamic calculation model, respectively, the bridge-downward impact force at the valve and its variation with time can be obtained when the water hammer effect occurs. Furthermore, the impact force is taken as the dynamic loading and applied to the bridge model. The calculation results suggest that the impact force of water hammer may vary periodically, and relatively large impact loading is generated when the valve is switched off in a short time. The dynamic responses of various components of single-tower cable-stayed bridge under water hammer impact are mainly in the bridge-downward direction with accompanied vertical displacement and stress. The stress changes in girder can be neglected, and stress variations in tower and stayed cables can approach 0.7MPa and 1.5MPa, respectively. The pipeline laid at single side may produce eccentric effect, leading to the nonsymmetric dynamic response of structure.
孙建渊 王灏. 输水管道水锤效应作用下斜拉桥结构动力响应研究[J]. 土木工程学报, 2017, 50(2): 82-87.
Sun Jianyuan Wang Hao. Study on dynamic response of cable-stayed bridge under water hammer action in water pipeline. 土木工程学报, 2017, 50(2): 82-87.
