建筑结构学报2018，Vol.39Issue(2)：97-105,9.DOI:10.14006/j.jzjgxb.2018.02.011
圆钢管型钢再生混凝土组合柱轴压性能及承载力计算
Axial compression performance and bearing capacity calculation of recycled concrete filled circular steel tube-profile steel composite columns
摘要
Abstract
In order to study the axial compression performance of recycled concrete filled circular steel tube-profile steel composite columns,11 specimens were designed for compression test,and the replacement percentage of recycled coarse aggregate,diameter to thickness ratio of steel tube,steel reinforced ratio,slenderness ratio were regarded as major variable parameters.By the experiment,the whole mechanical process and failure mode of all specimens were observed,and the load-displacement curves,load-strain curves were obtained.The influence of the design parameter on the axial compression behavior of the specimens was analyzed.The test results indicate that the main failure characteristic of composite columns is profile steel yielding at first and steel tube is bulged afterwards.In addition,the shear failure and the crush failure are the main failure modes of core recycled concrete.The axial bearing capacity of composite columns decreases with the increase of recycled coarse aggregate replacement ratio,while the members still show good deformability.Furthermore,the diminution of diameter to thickness ratio of circular steel tube and the rise of steel reinforced ratio are both beneficial to the axial bearing capacity and ductility for composite columns.The axial compression capacity of composite columns is reduced by increasing slenderness ratio;in addition,the lateral deformation coefficient is about 1.2.Based on the limit analysis and test data,the bearing capacity calculation formula which applies to recycled concrete filled circular steel tube-profile steel composite columns is proposed.By comparing the calculation results with test results,a good agreement can be obtained.关键词
圆钢管型钢再生混凝土/组合柱/再生粗骨料取代率/轴压试验/轴压性能/承载力Key words
recycled concrete filled circular steel tube-profile steel/composite column/recycled coarse aggregate replacement percentage/axial compression test/axial compression performance/bearing capacity分类
建筑与水利引用本文复制引用
马辉,郭婷婷,李哲,薛建阳,刘云贺..圆钢管型钢再生混凝土组合柱轴压性能及承载力计算[J].建筑结构学报,2018,39(2):97-105,9.基金项目
国家自然科学基金项目(51408485),中国博士后科学基金项目(2015M572584),陕西省自然科学基础研究计划(2016JQ5024). （51408485）
