地震波输入角度对大型脱硫塔结构动力影响的实验研究  

Experimental study on the dynamic effect of a desulfurization tower under different seismic wave input angles

作　　者：宋波[1] 盛朝晖[1,2] 徐明磊[3] 王利[3] 

机构地区：[1]北京科技大学土木与环境学院,北京100083 [2]河北工程大学水电学院,邯郸056021 [3]北京国电龙源环保工程有限公司,北京100083

出　　处：《北京科技大学学报》2010年第12期1648-1654,共7页Journal of University of Science and Technology Beijing

基　　金："十一五"国家科技支撑计划资助项目(No.2006BAJ13B04);北京国电龙源环保工程有限公司科技项目(No.13B04)

摘　　要：对某电厂大型脱硫塔结构模型进行了模拟地震的振动台实验研究.以缩尺比例为1∶15的薄壁钢结构脱硫塔为模型,在多角度输入正弦波、天津波和日向滩冲地震波的前提下,对塔体加速度峰值反应及最不利激励波输入角度进行了研究探讨.结果表明:激励波输入角度对结构动力反应的影响以与结构成30°角方向为最大,60°角方向最小,结构在地震波作用下,塔体加速度峰值的分布明显不同于正弦波情况;脱硫塔结构的复杂性会对结构的动力反应产生较大的影响,塔顶重量较大是引起结构加速度峰值沿塔高分布严重不均匀的主要因素之一.The simulated earthquake experimental study on a large desulfurization tower was carried out using shaking table test. A 1 ： 15 reduced-scale thin-walled steel structure model of the desulfurization tower was designed for testing and the dynamic responses of the model were discussed. The responses of peak acceleration were studied under a sine wave, Tianjin wave and Hyuga seismic wave in various angles and the most unfavorable input angle was analyzed. The results show that the influence of the input angle of an excitation wave can not be ignored, the maximum influence is in the direction of 30° and the minimum is in the direction of 60°. The complexity of the thin-wall desulfurization tower can affect the dynamic characteristics of the structure to a great extent. The weight of the tower top is one of the main factors causing the distribution of peak acceleration uneven in tower height.

关 键 词：薄壁结构 脱硫 振动台 地震波 动力特性 

分 类 号：TU333[建筑科学—结构工程]