圆形中空夹层不锈钢管混凝土短柱轴压力学性能分析  

Analysis on axial compression mechanical behavior of circular concrete-filled double skin steel tubular short columns with external stainless steel tube

作　　者：彭桂瀚[1] 宋春生 罗慧苓 王洁 PENG Guihan;SONG Chunsheng;LUO Huiling;WANG Jie(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;School of Applied Science and Engineering,Fuzhou Institute of Technology,Fuzhou 350506,China;Bohai Petroleum Equipment Fujian Steel Pipes Co.,Ltd.,Fuzhou 350512,China)

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]福州理工学院,福建福州350506 [3]渤海石油装备福建钢管有限公司,福建福州350512

出　　处：《南昌大学学报（工科版）》2020年第4期340-345,375,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：福建省自然科学基金资助项目(2018J01769);福建省教育厅中青年教师教育科研项目(JAT170791)。

摘　　要：为了研究圆形中空夹层不锈钢管混凝土短柱轴压力学性能,基于试验建立基准有限元实体模型,开展空心率、混凝土和内外钢管强度等关键参数分析,提出结构承载力修正算法,同时探讨目前国内外相关规程对该类结构承载力计算的适用性。结果表明:研究参数范围内,混凝土、外钢管强度与结构承载力呈线性正比关系;不同空心率下高强内钢管中空夹层结构承载力均高于实心结构,承载力随空心率增大先增后减,空心率为0.46时承载力最高;提出的结构承载力修正算法计算值与试验值吻合较好;目前国内外相关规程计算方法用于该类结构均偏于保守。In order to investigate the mechanical behavior of concrete-filled double skin steel tubular short columns with external stainless steel tube,the finite solid element model was established and the correctness of this model was verified by the test,the main parameters including hollow ratio,concrete strength,outer stainless steel tube strength and inner carbon steel tube strength were investigated,the correction algorithm was provided,and discusses the applicability of relevant codes in calculating the bearing capacity.The research results showed the concrete strength and outer stainless steel tube strength was approximately linearly proportional to the ultimate bearing capacity;the bearing capacity of concrete-filled double skin steel tubular short columns with high-strength inner steel tube was higher than the solid structure at different hollow ratios,the bearing capacity increased firstly and then decreased as the hollow ratio increases,and the bearing capacity was the highest with the hollow ratio of 0.46;the calculated value according to the correction algorithm was in good agreement with the test value;the current codes for the bearing capacity of this types of structure were conservative.

关 键 词：中空夹层 不锈钢 钢管混凝土 轴压 有限元 

分 类 号：TU997[建筑科学—市政工程]