株洲航电枢纽溢流坝段边墩有限元分析

Finite Element Analysis for Side Pier in Overflow Dam of Zhuzhou Navigation-power Junction

坝工设计中,溢流坝闸墩设计是仅次于坝体设计的一个重要项目。对于此类结构采用普通杆件力学方法难以获得满意结果,所以采用结构有限元分析软件ANSYS对株洲航电枢纽溢流坝段25#边墩进行正常水位和校核水位两种工况下的结构应力复核计算。通过计算可以得知在正常挡水工况下,由于闸墩受到闸门推力、水压力和主动土压力的作用在牛腿处产生的拉应力集中,而在背水面的拉应力区出现在边墩背水侧的上游面与迎水面拐角处。通过分析可以总结和归纳出应力、位移在闸墩上的分布规律,为其配筋提供依据,并验证其结构设计的合理性。

In the design work of dams, the overflow pier is a significant project only next to the dam body. For this kind of structure, using a common bar mechanics approach is difficult to obtain satisfactory results, so the finite element analy- sis software ANSYS is used to check and calculate the structure stress at the normal water level and check water level for the pier 25^# in the overflow dam of Zhuzhou navigation-power junction. Through the calculation, it is found that under normal water level condition, and because of the gate thrust, water pressure and active earth pressure, there appears the tensile stress concentration at the bracket, whereas in the dorsal surface, the tensile stress area appears at the corner of the upstream face and water face of the pier＇ s back side. The distribution law of stress and displacement on the pier could be summarized through the analyses, which could provide some bases for the reinforcing, and verify the rationality of the structural design.