防灾减灾工程学报2018，Vol.38Issue(1)：161-167,7.DOI:10.13409/j.cnki.jdpme.2018.01.022
冷却塔塔筒荷载效应和简化设计方法——各荷载单独作用分析
Load Effects and Simplified Design Procedure of the Shell of Hyperbolic Cooling Tower——Effects of Every Single Load
摘要
Abstract
Studies were initiated for a simplified procedure for ultimate limit state design of the shell of hyperbolic cooling tower (HCT) which involves many different wind directions.It is primary to comprehensively understand the characteristics of internal forces under every single load.The internal forces of a representative HCT under different loads,including gravity (G),wind (W),thermal actions in winter and summer (Tw,Ts),horizontal and vertical earthquakes (EH,Ev) with reasonable load values,were illustrated individually and compared systematically.The predominant internal forces and their circumferential distributions are the main concerns.According to the results,load effects of G,Tw and Ev are uniformly distributed along the circumfer ence,so they have no influence on the direction combination of load effects.The maximal internal forces under Ts and EH are located on a stationary meridian line,and they are mainly bending moments and axial forces,respectively.So the most unfavorable combination of load effects emerges when the two load directions coincide.For wind load,its arbitrary wind direction,complex distribution of internal forces,and the coexistence of bending moment and axial force make it inevitable that many wind directions are involved in considering combination of load effects.However,the distribution characteristics of internal forces make it possible to simplify the combination of load effects of HCT shell.关键词
双曲冷却塔/荷载效应组合/简化设计方法/荷载方向/内力环向分布特征Key words
hyperbolic cooling towers/combination of load effects/simplified design procedure/load direction/circumferential distribution characteristics of internal forces分类
建筑与水利引用本文复制引用
张军锋,朱冰,丁玉玺..冷却塔塔筒荷载效应和简化设计方法——各荷载单独作用分析[J].防灾减灾工程学报,2018,38(1):161-167,7.基金项目
国家自然科学基金项目(51508523)、博士后科学基金项目(2014M2016)资助 （51508523）
