内压外拉预应力杆的受压稳定分析  

BUCKLING OF COLUMNS PRE-TENSIONED BY A COMPRESSED CORE-BAR

作　　者：童根树[1] 陈明 张磊[1] 程鹏[1] TONG Genshu;CHEN Ming;ZHANG Lei;CHENG Peng(Institute of High-Performance Structures and Materials,Zhejiang University,Hangzhou 310058,China;Shanghai Open Steel Structure Co.,Ltd.,Shanghai 201500,China)

机构地区：[1]浙江大学高性能建筑结构与材料研究所,杭州310058 [2]上海欧本钢结构有限公司,上海201500

出　　处：《钢结构》2019年第6期1-7,43,共8页Steel Construction

摘　　要：从三方面对内压外拉预应力杆的受压弹性承载力进行了分析:一是纯理论分析,包括静力法和能量法的求解;二是非线性弹性有限元分析,采用ANSYS和ABAQUS两种软件;三是试验研究。三个方面的研究结果均表明:施加预拉力不能提高弹性临界荷载。欧本试验和非线性有限元分析的结果还表明:芯棒施加预压力降低了压杆的整体临界荷载。The paper studied the buckling of pre-stressed columns where the exterior tube is pre-tensioned by a pre-compressed core bar.Analysis is carried out in three ways.One is the theoretical analysis where the static approach and the energy method judging the stability of a structural system are used separately;the second method is the FE analysis using ANSYS and ABAQUS;the third is the test verification.The results of these three different studies show that the prestress in the column can not increase the buckling load,but reduce it slightly.

关 键 词：压杆 预应力 临界荷载 

分 类 号：TU323[建筑科学—结构工程]