新型鱼腹式空冷支架结构平扭耦联地震反应研究  

Research on Lateral-torsional Coupled Seismic Response Analysis of New Fish-bellied Support Structure System of Air-cooled Condenser

作　　者：吴健[1] 白国良[1] 李雪[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学理学院,陕西西安710055

出　　处：《防灾减灾工程学报》2016年第6期913-918,926,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(50678059);河北省教育厅科研计划项目(2004435)资助

摘　　要：空冷技术是我国正在逐步推进的新技术,空冷支架结构作为大量冷却设备的下部承重结构,其安全性直接影响电厂能否正常运行。传统的支架结构为钢桁架-钢筋混凝土管柱的混合布置,结构的质量和刚度沿竖向分布严重不均匀。因此,在装机容量逐步增大的实际情况下,针对一种新型鱼腹式空冷支架结构进行地震作用影响分析,获得其基本动力特性,并研究在多维地震作用下角柱、边柱的柱底剪力和侧移变化情况;对腹杆的受力进行分析,给出在考虑扭转效应时的设计建议。结果表明,地震作用下结构的扭转效应应该引起足够重视,不计算扭转效应时,应对双向地震作用响应乘以放大系数。Air-cooled technology is the development direction in the thermal power,and as the bearing structure,safety of support structure system play an important role in the normal operation of the power plant.Traditional support structure system usually uses hybrid layouts of steel truss and reinforced concrete pipe column,whose mass and stiffness are not even in the vertical direction.In order to solve the problem of larger and larger installed capacity,this paper chooses a new type support system,which is called fish-bellied support structure to study the response of earthquake,including the basic dynamic characteristics,the displacement and the column base shearing force of the corner column and side column and analyses the stress of the abdomen and gives the design suggestion when considering the torsional effect.And the results show that we should pay more attention to the torsional effect,and the earthquake response under bi-directional earthquake action should multiply the magnification factor when not considering the torsional effect.

关 键 词：空冷支架结构 鱼腹式 多维地震作用 扭转效应 扭转加速度分量 

分 类 号：O353.1[理学—流体力学] TU81[理学—力学]