|Table of Contents|

Axial compression performance of CFST short columns with variable circular cross sections(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年06期
Page:
45-57
Research Field:
建筑结构
Publishing date:

Info

Title:
Axial compression performance of CFST short columns with variable circular cross sections
Author(s):
LONG Gang1; 2;  LIU Yongjian1;  ZHU Weiqing1;  REN Pengju1; 3
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Xi'an Huantong Municipal Engineering Project Management Co., Ltd., Xi'an 710038, Shaanxi, China; 3. Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 200092, China)
Keywords:
bridge engineering;  CFST short column;  experimental study;  axial compression performance;  variable cross section;  bearing capacity
PACS:
U448.36
DOI:
10.19815/j.jace.2022.02068
Abstract:
In order to study the axial compression performance of concrete filled steel tube(CFST)short columns with variable circular cross sections, six CFST short columns with variable circular cross sections and two CFST short columns with constant circular cross sections were tested under axial compression. The test parameters included variable angle and hoop index. Comparative analysis of the similarities and differences between CFST short columns with variable circular cross section and constant circular cross section was carried out from two aspects: the overall axial compression performance of the short column(failure mode, load-displacement curve, and deformation capacity)and the axial compression performance of the section(steel tube strain). The influence of various design parameters on the overall and cross section axial compression performance was obtained. On the basis, a calculation method for the axial compressive bearing capacity of CFST with with variable circular cross section was established. The accuracy of the proposed calculation method was verified by comparing the axial compression bearing capacity values calculated by the proposed calculation method and the standard calculation formula with the experimental measured values. The results show that the longitudinal and circumferential strains of the steel tube in the upper section of the specimen develop faster than those in the lower section. The overall stress performance of the specimen during the elastic-plastic and descending stages depends more on the top area and top section of the specimen. Compared to constant cross-section short columns, the longitudinal and circumferential stresses of the steel tube in the middle section of CFST short columns with variable circular cross sections is larger under the same load. The steel-concrete interaction of CFST with variable circular cross section is very obvious. The proposed calculation method can not only consider the interaction between circular steel tube and concrete, but also reasonably consider the characteristic that the steel-concrete interaction gradually increases with the increase of variable angle, and the calculated axial compression bearing capacity is in good agreement with the experimental values. Compared with other specifications, the calculation results of the formulas in GB 50936—2014 and CECS 28:2012 are relatively more accurate, considering its simplicity and practicality, it can also be used to safely calculate the axial compression bearing capacity of steel tube concrete members with variable cross section.

References:

[1] 蔡绍怀,焦占拴.钢管混凝土短柱的基本性能和强度计算[J].建筑结构学报,1984,5(6):13-29.
CAI Shaohuai,JIAO Zhanshuan.Behavior and ultimate strength of short concrete-filled steel tubular columns[J].Journal of Building Structures,1984,5(6):13-29.
[2]HAN L H,YAO G H.Influence of concrete compaction on the strength of concrete-filled steel RHS columns[J].Journal of Constructional Steel Research,2003,59(6):751-767.
[3]ELLOBODY E,YOUNG B,LAM D.Behaviour of normal and high strength concrete-filled compact steel tube circular stub columns[J].Journal of Constructional Steel Research,2006,62(7):706-715.
[4]SAKINO K,NAKAHARA H,MORINO S,et al.Behavior of centrally loaded concrete-filled steel-tube short columns[J].Journal of Structural Engineering,2004,130(2):180-188.
[5]刘永健,姜 磊,张 宁.钢管混凝土中钢管的纵向容许应力[J].建筑科学与工程学报,2015,32(6):1-7.
LIU Yongjian,JIANG Lei,ZHANG Ning.Longitudinal allowable stress of steel tube in concrete-filled steel tube[J].Journal of Architecture and Civil Engineering,2015,32(6):1-7.
[6]姜 磊,刘永健,侯蓓蓓.钢管混凝土拱肋轴力-应变关系[J].中国公路学报,2016,29(11):90-98.
JIANG Lei,LIU Yongjian,HOU Beibei.Axial force-strain relationship of concrete-filled steel tube arch rib[J].China Journal of Highway and Transport,2016,29(11):90-98.
[7]HAN L H,REN Q X,LI W.Tests on inclined,tapered and STS concrete-filled steel tubular(CFST)stub columns[J].Journal of Constructional Steel Research,2010,66(10):1186-1195.
[8]LAM D,DAI X H,HAN L H,et al.Behaviour of inclined,tapered and STS square CFST stub columns subjected to axial load[J].Thin-walled Structures,2012,54:94-105.
[9]任鹏举,龙 刚,朱伟庆,等.变截面钢管混凝土短柱轴压性能研究[J].建筑结构,2019,49(增1):555-560.
REN Pengju,LONG Gang,ZHU Weiqing,et al.Study on axial compression performance of concrete filled steel tubular short columns with variable cross section[J].Building Structure,2019,49(S1):555-560.
[10]LI W,REN Q X,HAN L H,et al.Behaviour of tapered concrete-filled double skin steel tubular(CFDST)stub columns[J].Thin-walled Structures,2012,57:37-48.
[11]LI W,HAN L H,REN Q X,et al.Behavior and calculation of tapered CFDST columns under eccentric compression[J].Journal of Constructional Steel Research,2013,83:127-136.
[12]REN Q X,HAN L H,HOU C,et al.Experimental behaviour of tapered CFST columns under combined compression and bending[J].Journal of Constructional Steel Research,2017,128:39-52.
[13]任庆新,刘绍鹏,贾连光.圆锥形钢管混凝土长柱力学性能研究[J].工业建筑,2014,44(4):32-36.
REN Qingxin,LIU Shaopeng,JIA Lianguang.Research on circular tapered concrete-filled steel tubular long columns[J].Industrial Construction,2014,44(4):32-36.
[14]任庆新,李 林,王庆利.方锥形钢管混凝土长柱工作机理分析[J].工业建筑,2014,44(4):27-31.
REN Qingxin,LI Lin,WANG Qingli.Behaviour of square tapered concrete-filled steel tubular long columns[J].Industrial Construction,2014,44(4):27-31.
[15]史艳莉,张 宸,王景玄,等.圆锥形中空夹层钢管混凝土压弯构件抗震性能[J].建筑科学与工程学报,2019,36(5):80-88.
SHI Yanli,ZHANG Chen,WANG Jingxuan,et al.Seismic behavior of tapered concrete-filled double skin steel tube compression-bending members[J].Journal of Architecture and Civil Engineering,2019,36(5):80-88.
[16]欧智菁,晏巧玲,薛建阳,等.变截面钢管混凝土格构柱轴压极限承载力[J].重庆大学学报,2016,39(5):114-120.
OU Zhijing,YAN Qiaoling,XUE Jianyang,et al.The ultimate load carrying capacity of variable cross-sectional concrete filled steel tubular laced columns on axial load[J].Journal of Chongqing University,2016,39(5):114-120.
[17]欧智菁,陈盛富,吴庆雄,等.变截面钢管混凝土格构柱抗震性能试验研究[J].建筑结构学报,2018,39(3):77-83.
OU Zhijing,CHEN Shengfu,WU Qingxiong,et al.Experimental research on seismic performance of variable cross-sectional concrete filled steel tubular laced columns[J].Journal of Building Structures,2018,39(3):77-83.
[18]陈 鹏,王玉银,刘昌永,等.圆钢管混凝土轴压性能尺寸效应试验研究[J].建筑结构学报,2017,38(增1):249-257.
CHEN Peng,WANG Yuyin,LIU Changyong,et al.Experimental study on size effect of circular concrete-filled steel tubular columns subjected to axial compression[J].Journal of Building Structures,2017,38(S1):249-257.
[19]YAMAMOTO T,KAWAGUCHI J,MORINO S.Experimental study of scale effects on the compressive behavior of short concrete-filled steel tube columns[J].Composite Construction in Steel and Concrete,2000,25:879-891.
[20]LI D,JIN L,DU X L,et al.Size effect tests of normal-strength and high-strength RC columns subjected to axial compressive loading[J].Engineering Structures,2016,109:43-60.
[21]TAO Z,HAN L H,WANG D Y.Strength and ductility of stiffened thin-walled hollow steel structural stub columns filled with concrete[J].Thin-walled Structures,2008,46(10):1113-1128.
[22]DING F X,LU D R,BAI Y,et al.Comparative study of square stirrup-confined concrete-filled steel tubular stub columns under axial loading[J].Thin-walled Structures,2016,98:443-453.
[23]钢管混凝土拱桥技术规范:GB 50923—2013[S].北京:中国计划出版社,2014.
Technical code for concrete-filled steel tube arch bridges:GB 50923—2013[S].Beijing:China Planning Press,2014.
[24]公路钢管混凝土拱桥设计规范:JTG/T D65-06-2015[S].北京:人民交通出版社,2015.
Specifications for design of highway concrete-filled steel tubular arch bridges:JTG/T D65-06-2015[S].Beijing:China Communications Press,2015.
[25]钢管混凝土结构技术规范:GB 50936—2014[S].北京:中国建筑工业出版社,2014.
Technical code for concrete filled steel tubular structures:GB 50936—2014[S].Beijing:China Architecture & Building Press,2014.
[26]钢管混凝土结构技术规程:CECS 28:2012[S].北京:中国计划出版社,2012.
Technical specification for concrete-filled steel tubular structures:CECS 28:2012[S].Beijing:China Planning Press,2012.
[27]矩形钢管混凝土结构技术规程:CECS 159:2004[S].北京:中国计划出版社,2004.
Technical specification for structures with concrete-filled rectangular steel tube members:CECS 159:2004[S].Beijing:China Planning Press,2004.
[28]陈惠发,SALEEB A F.弹性与塑性力学[M].北京:中国建筑工业出版社,2004.
CHEN Huifa,SALEEB A F.Elasticity and plasticity[M].Beijing:China Architecture & Building Press,2004.
[29]MANDER J B,PRIESTLEY M J N,PARK R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826.
[30]龙 刚.城市钢管混凝土拱桥设计与施工关键技术研究[D].西安:长安大学,2019.
LONG Gang.Key technique study on urban concrete-filled steel tubular arch bridge design and construction[D].Xi'an:Chang'an University,2019.

Memo

Memo:
-
Last Update: 2023-12-01