足尺拼接式方形高强钢管混凝土柱轴压承载力数值分析  

NUMERICAL RESEARCH ON AXIAL BEARING CAPACITY OF FULL-SIZED SQUARE HIGH-STRENGTH CONCRETE-FILLED STEEL TUBULAR COLUMNS

作　　者：李军心 曾尚丰 LI Jun-xin;ZENG Shang-feng(School of Human Settlements and Civil Engineering,Xi'an Jiaotong University,710049,Xian,China;Fujian Hengji Construction Co,Ltd,364000,Longyan,Fujian,China)

机构地区：[1]西安交通大学人居环境与建筑工程学院,西安710049 [2]福建省恒基建设股份有限公司,福建龙岩364000

出　　处：《建筑技术》2024年第3期342-344,共3页Architecture Technology

基　　金：福建省住房和城乡建设厅科技研究开发计划项目(2022–K–131)。

摘　　要：对两种不同的新型拼接式方形高强钢管混凝土足尺柱的轴压承载性能进行了数值模拟,分析了混凝土强度、钢材强度、缀材间距和宽厚比对该类组合柱轴压承载力及荷载–位移曲线的影响规律,研究表明:同种参数影响下两种形式的组合柱荷载–位移曲线及承载力变化规律相似;材料强度和宽厚比对承载力影较为显著,如钢材屈服强度从345 MPa提升至460 MPa时,两种组合柱承载力分别提高了9.13%和9.42%,宽厚比从83.3增大至100时,两类柱子承载力分别降低了5.08%和5.00%;可初步采用GB 50936—2014《钢管混凝土结构技术规范》计算该类新型柱的轴压承载力。This paper conducted numerical simulation on the axial compression behavior of two different new-type built-up square CFST columns under the full-scale size.Influences of concrete strength,steel strength,distance of binding strips and width-to-thickness ratio on the axial compression strength and load-displacement curves were examined.It indicates that:the load-displacement curves and bearing capacity of the two types of composite columns behave similarly under the same design parameters;material strengths and B/t ratios have a significant effect,e.g.,as the steel yield strength increases from 345 MPa to 460 MPa,the bearing capacity of two types of composite columns increase by 9.13%and 9.42%,respectively,the corresponding capacity respectively decreases by 5.08%and 5.00%as enhancing B/t ratio from 83.3 to 100,the method in GB 50936—2014 Technical code for concrete filled�steel�tubular�structures can be preliminarily adopted to calculate the axial bearing capacity of this new-type CFST column.

关 键 词：足尺方形高强钢管混凝土柱 拼接式截面 附设缀材 轴压承载力 数值模拟 

分 类 号：TU473.16[建筑科学—结构工程]