冷却塔塔筒内力影响面与风荷载效应分析  

Influence Surfaces of Internal Forces and Wind Effects of Hyperbolic Cooling Tower Shell

作　　者：张军锋[1,2] 田家安 辛思远 赵林[2] ZHANG Junfeng;TIAN Jia＇ an;XIN Siyuan;ZHAO Lin(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001, China;State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092, China)

机构地区：[1]郑州大学土木工程学院,郑州450001 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2018年第2期95-99,共5页Structural Engineers

基　　金：国家自然科学基金项目(51508523)

摘　　要：以某大型双曲冷却塔为例,借助塔筒内力的影响面,分析了表面荷载对塔筒内力的影响,便于理解塔筒表面风压分布与内力的关系。研究发现:冷却塔的环向内力和子午向弯矩的影响面具有显著的局部效应,即上述内力仅受所在位置附近荷载的影响;子午向轴力影响面的局部性最弱,即受到整个塔筒高度范围荷载的影响;剪力和扭矩则介于上述两者之间;各个内力影响面的局部性在环向的表现较子午向更为明显,都主要受左右两侧各60°环向范围荷载的影响。正因塔筒内力影响面在环向的局部性,使风荷载作用下的内力环向分布表现出与风压分布类似的特征。Studies were focused on the influences of shell load on the shell internal forces of hyperbolic cooling towers, and the influence surfaces of internal forces were employed in the illustration. It was found that the influence surfaces of latitude axial force, latitude moment and meridian moment show the striking local effect, or these internal forces are just influenced by the pressure around their locations. The influence surface of meridian axial force shows the minor local effect, or it would be influenced by the pressure along the shell height. The shear force and torque moment are between the former two conditions. Furthermore, the local effects are more profound in latitude than in meridian direction. Due to the latitude local effect of influence surfaces for all internal forces, the latitude distributions of wind pressure and internal forces show great similarities.

关 键 词：双曲冷却塔 塔筒内力 影响面 风荷载效应 

分 类 号：TU973.213[建筑科学—结构工程]