摘要
通过景洪水电站水力式升船机塔楼、机房1/50结构模型振动台试验,获得了塔楼、机房结构的动力特性和对输入地震波的动力响应,发现上部机房结构产生明显的鞭梢效应与扭转效应。通过对比试验分析了竖井内水体与塔楼耦合作用可使上部机房结构的自振频率下降、主机房结构在地震波激励下的动力响应减弱,表明竖井内水体与塔楼的耦合作用在一定条件下具有消能减震的作用。研究结果可为深入研究上部主机房鞭梢效应与扭转效应提供依据。
Based on the shaking table model test of the ship lift tower and engine room 1/50, dynamic characteristics and dynamic response of the structure are obtained. Significant whiplash effect and torsion effect are found out by comparing the result of the test, analyzing the effect of the engine room generated by the interaction of the vertical structure within the water body due to the interaction, the structure＇s natural frequency declines, dynamic effect of the host engine room inspired by the seismic waves is weakening, the interaction of the vertical structure within the water body plays the role of passive energy dissipation. The result of the model test can provide comparison for studying more about the effect of structure-water interaction.
出处
《水电能源科学》
北大核心
2009年第5期100-103,共4页
Water Resources and Power
关键词
水力式升船机
振动台模型试验
水平动力响应
鞭梢效应
扭转效应
hydraulic ship lift tower
shaking table model test
horizontal dynamic response
whiplash effect
torsion effect
