竖向地震作用下钢-钢筋混凝土塔式组合结构抗震性能研究  

Seismic performance study on steel-reinforced concrete composite tower under vertical earthquake excitation

作　　者：白国良[1] 郝彬 Bai Guoliang;Hao Bin(Xi'an University of Architecture and Technology, Xi'an 710000, China)

机构地区：[1]西安建筑科技大学,陕西西安710000

出　　处：《土木工程学报》2019年第3期12-19,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(51478381)

摘　　要：为研究钢-钢筋混凝土塔式太阳能发电组合结构在竖向地震作用下的抗震性能,对一实际工程的1/18缩尺模型结构进行模拟地震振动台试验。通过观察试验现象和分析试验结果,得出结论为:模型结构竖向前三阶频率分别为18.55Hz、20.12Hz和22.14Hz;结构质心处加速度反应最大,紫铜结构的加速度反应小于混凝土筒体的加速度反应;结构质心处位移反应最大,最大值为4.79mm;强震作用下竖向地震影响对结构起控制作用,同等水准地震作用下水平向地震加速度反应最大值出现时间晚于竖向地震加速度反应最大值;结构塔顶竖向伸缩效应不明显。In order to study the seismic performances of steel-reinforced concrete composite towers under the action of vertical earthquake, the 1/18 scaled model of an actual project was tested on the shaking table. By observing the phenomenon and analyzing the results, it is concluded that the first three vertical frequencies are 18.55 Hz, 20.12 Hz and 22.14 Hz, respectively. The acceleration responses at the mass center of the structure are maximum, and the acceleration responses of the copper structure are smaller than that of the concrete. The maximum displacement at the center of mass of the structure is 4.79 mm. The structure is controlled by the vertical strong earthquake. For vertical and lateral earthquakes with the same level, the maximum horizontal acceleration always occurs later than the vertical acceleration. The vertical telescopic effect on the top of the tower is not obvious.

关 键 词：塔式结构 组合结构 振动台试验 竖向地震 抗震性能 

分 类 号：TU398[建筑科学—结构工程]