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为探讨明钢管在地震作用下的响应规律,采用有限单元法对正常运行遭遇地震和管道放空遭遇地震两种工况下某水电站地面明钢管进行了时程分析。结果表明,正常运行遭遇地震时明钢管主要产生较大的横向加速度和位移,而在放空遭遇地震时,由于管内无水及垂向限位措施,除了产生较大的横向位移外,管道还将在垂直管轴的竖向产生较大的加速度和位移,导致管道脱离支座向上跳动。由此可见,地震引起的钢管横向滑移和竖向跳动将对其安全稳定运行产生不利影响,建议同时采取横向和竖向限位措施。
In order to investigate the response of Ming steel tube under the action of earthquake, the finite element method was used to analyze the time history of the steel tube in the ground of a certain hydropower station under both normal operation and earthquakes. The results show that, during the normal operation, the steel pipe mainly produces large lateral acceleration and displacement. In the event of earthquakes encountered in the event of earthquakes, the pipeline will not only generate large lateral displacement due to the waterless and vertical restraint measures in the pipe, In the vertical axis of the shaft to produce greater acceleration and displacement, leading to the pipe from the bearing up beating. It can be seen that the lateral slip and vertical runout caused by the earthquake will adversely affect the safe and stable operation of the steel pipe. It is suggested that horizontal and vertical stop measures be taken simultaneously.