钢管混凝土风力机塔架屈曲性能研究  

Study on Stability of Concrete Filled Steel Tubular Tower

作　　者：左熹[1] 顾荣蓉[1] ZUO Xi;GU Rongrong(Institute of Architectural Engineering,Jinling Institute of Technology Nanjing 211169)

机构地区：[1]金陵科技学院建筑工程学院,南京211169

出　　处：《工业安全与环保》2018年第10期15-19,共5页Industrial Safety and Environmental Protection

基　　金：江苏省青蓝工程资助项目(2016)

摘　　要：基于刚性基底压杆模型,建立了中空钢管混凝土塔架的有限元屈曲模型,研究了空心率和径厚比对中空钢管混凝土塔架屈曲性能的影响,分析比较了洞口、门框等不同情况下传统钢制塔架和中空钢管混凝土塔架的性能差异,并对三种不同风况下中空钢管混凝土塔架的屈曲性能进行了研究。结果表明:中空钢管混凝土塔架的一阶屈曲荷载随着空心率和径厚比增大呈指数曲线减小,但两者的变化趋势不同。两种塔架的前十阶屈曲特征值变化规律是相似的,但中空钢管混凝土塔架的屈曲特征值是传统钢塔架的2倍多。在不同风况下中空钢管混凝土塔架的塔顶是最易发生失稳的部位,随着风速增大,塔架底部内外钢管的局部屈曲逐渐严重。Based on the rigid foundation strut model,the finite element model of CFDSST was established.The influences of the hollow ratio and the diameter-to-thickness ratio of CFDSST were researched.And then,by comparing different conditions of holes and door frames,the performance variation between CFST and CFDSST was analyzed.Furthermore,the buckling performance of CFDSST against different conditions of wind was studied.The result shows that the first-order buckling load of CFDSST in exponential curve decreases with the increase of the hollow ratio and the diameter-to-thickness ratio and however,the two variation trends have some differences.Although the buckling characteristic values of the first ten decks of the two towers are similar,the buckling characteristic value of CFDSST is more than twice that of CFST.In the different wind conditions,the top of CFDSST is the most prone to lose its stability.And with the increase of wind speed,the local buckling of the steel pipe at the bottom of tower gradually becomes more serious.

关 键 词：中空钢管混凝土塔架 屈曲性能 有限元 稳定性 

分 类 号：TU398.9[建筑科学—结构工程]