中部等截面梭形柱的试验研究及有限元分析  

EXPERIMENTAL STUDY AND FINITE ELEMENT ANALYSIS OF SHUTTLESHAPE COLUMNS WITH UNIFORM CROSS SECTION IN THE MIDDLE PART

作　　者：尹冬玲[1] 郝际平[1] 陈永昌[1] 朱瑞涛[1] 樊春雷[1] 段海英 徐耀武 方敏勇[3] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]西部机场集团公司机场建设指挥部,陕西咸阳712035 [3]西安建筑科技大学富煌钢构研究院,西安710055

出　　处：《工业建筑》2012年第12期81-85,共5页Industrial Construction

摘　　要：对西安咸阳国际机场二期扩建工程T3A航站主楼3根梭形柱进行1∶2缩尺破坏性稳定试验研究,分析轴压梭形钢管柱在一端固接、一端铰接约束下的稳定极限承载力,并探讨其破坏特性和机理。试验结果表明,其极限承载力达到设计荷载的2倍以上,满足设计要求。同时,采用有限元方法对试验进行模拟,并与试验得到的稳定极限承载力、破坏形状、荷载-位移曲线等进行对比,二者吻合较好。此外,基于有限元分析可知:试件长度比α增大,极限承载力提高;试件楔率γ增大,极限承载力降低;同时给出楔率γ与极限承载力Pu的拟合公式。It was presented a model experimental study on the shuttle-shape columns for the main building of the phase Ⅱ expansion project T3A terminal of Xianyang International Airport. Three SXZ models with a scale of 1/2 were tested under axial loading until failure. Their ultimate load-carrying capacities and failure mechanism were obtained and observed. Its ultimate bearing capacity was greater than 2 times its designed load, which could meet the requirements for design of the column. The results of test were compared with those obtained by FEM involved in ultimate load-carrying capacities, destruction modes and the load-displacement curves, and a good agreement was observed between them. In addition, based on FE model, it was analysed the effect of taper ratio and length ratio on the ultimate bearing capacity, and the formula between γ and Pu was presented.

关 键 词：梭形柱 缩尺试验 稳定极限承载力 楔率 长度比 

分 类 号：TU391[建筑科学—结构工程]