混凝土框架-钢柱阀厅结构振动台试验研究

本文对混凝土框架-钢柱换流站阀厅结构进行了地震模拟振动台试验.根据原型结构特点及试验室现有条件设计和制作了1/8满配重模型缩尺模型,选定了三种适用于不同场地类别的地震动进行逐级加载,在每级地震动加载前后,均对结构进行了白噪声输入.研究了阀厅结构地震响应(包括加速度放大系数、索的动拉力等)、结构固有频率变化、结构阻尼比和...

Shaking table test on seismic performance of concrete frame-steel column valve hall structure

The seismic performance of the concrete frame-steel column structure of the converter station valve hall under earthquake with different intensities was measured by shaking table tests.A 1/8 full weight scaled model was designed according to the prototype structure and the conditions of laboratory.Three kinds of scaled ground motion accelerations were applied as the seismic excitations.White noise was input to the structure.The natural frequencies,seismic responses,structural damping ratios and the development of cracks of the whole structure were investigated.The results show that the valve group has little seismic response effect on the overall structure,but the dynamic tension of the component parts of the valve tower connection should be considered in intensity seven of seldom occurring earthquake.The concrete frame-steel column structure can meet the demand in areas with seismic intensity seven,but the application of this type of structure in the areas with higher seismic intensities should be avoided.