钢管混凝土短柱轴心受压承载力与钢管作用研究
- 摘 要
-
（清华大学结构工程与振动教育部重点实验室，北京 100084）［摘要］为研究钢管混凝土短柱轴心受压承载力与钢管的作用，通过理论分析，建立了钢管约束承载力提高系数λ与套箍指标、钢管纵向应力和环向应力的关系。通过对124根轴心受压钢管混凝土短柱试验结果的分析，建立了λ与套箍指标和钢管屈服强度的关系式，提出了引入λ的钢管混凝土短柱轴心受压承载力计算公式。公式反映了钢管的直接承载作用和约束作用的大小，计算结果与试验结果符合良好。［关键词］钢管混凝土短柱；轴心受压承载力；钢管作用；钢管约束承载力提高系数Study on compressive strength and steel tube functions of centrally loaded short concrete filled-steel tube columnsJiang Zao, Qian Jiaru（Key Laboratory for Structure Safety and Durability of Education Ministry, Tsinghua University, Beijing 100084, China）Abstract:To study the compressive strength and steel tube functions of centrally loaded short concrete filled-steel tube columns, the relationship between the strength enhancement factor λ-due to steel tube confinement, the longitudinal stress and ring stress of steel tube was established by theoretical analysis. By analysis of the test results of 124 short concrete filled-steel tube columns subjected to centric axial compressive loads, the relationship betweenλand the confinement index and yield strength of steel tube is established and a formula for calculating the centric compressive strength of short concrete filled-steel tube columns is proposed. The factor λis introduced in the formula and the function of steel tube is reflected. The calculating results have good agreement with the test results.Keywords:short concrete filled-steel tube column; centric axial compressive strength; steel tube function; strength enhancement factor; steel tube confinement国家自然科学基金重大研究计划重点项目（90815025）；北京市科技计划重点项目(D09050600370000)；北京市教委科技计划重点项目(KE200910005008)。作者简介：江枣，博士，Email：jiang-z05@mails.tsinghua.edu.cn。参考文献［1］蔡绍怀. 现代钢管混凝土结构［M］. 北京：人民交通出版社，2007.［2］гвзозцев A A.极限平衡法的结构承载能力的计算［M］.袁文柏，译.北京：中国建筑工业出版社，1958.［3］CECS28:90钢管混凝土结构设计与施工规程［S］. 北京: 中国计划出版社, 1992.［4］钟善桐. 钢管混凝土统一理论—研究与应用［M］.北京：清华大学出版社, 2006.［5］DL/T5085—1999钢混凝土组合结构设计规程［S］. 北京: 中国电力出版社, 1999.［6］JCJ01—89钢管混凝土设计与施工规程［S］. 上海: 同济大学出版社，1992.［7］KENJI SAKINO, HIROYUKI NAKAHARA. Behavior of centrally loaded concrete-filled steel-tube short columns［J］. Journal of Structural Engineering, 2004, 130(2): 180-188.［8］王力尚, 钱稼茹. 钢管高强混凝土应力应变全曲线试验研究［J］. 建筑结构, 2004, 34(1): 11-12, 19.［9］汤关祚,招炳泉, 竺惠仙, 等. 钢管混凝土基本力学性能的研究［J］. 建筑结构学报, 1982, 3(1): 13-31.［10］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.［11］顾维平,蔡绍怀, 冯文林. 钢管高强混凝土的性
