建筑结构学报2012，Vol.33Issue(9)：30-37,8.
薄壁方钢管再生混合短柱轴压性能试验研究
Tests on axial behavior of stub square thin-walled steel tubular columns filled with demolished concrete blocks
摘要
Abstract
Sixteen stub square thin-walled steel tubular columns filled with demolished concrete blocks （DCBs） were tested under axial loadings. Influences of some parameters （ such as replacement ratio of DCBs, strength difference between fresh concrete （FC） and DCBs, and thickness of steel tube ） on the axial compressive properties of the specimens were investigated. Based on the combined strength of the FC and DCBs, the axial compressive bearing capacity of the specimens was calculated, according to the current formulas for stub concrete filled square steel tubular columns, and compared with the measured results. Tests and calculation results show that the steel tube of a column filled with DCBs yields earlier than that of a column only filled with FC. The larger the replacement ratio of DCBs is, the earlier the steel tube yields. With an increasing of the replacement ratio of DCBs, the axial compressive bearing capacity of the specimens filled with DCBs decreases gradually on the whole. In the case that the strength difference between the FC and DCBs is limited, the influence of the replacement ratio within a range of 20% -33% on the axial compressive bearing capacity of the specimens filled with DCBs is limited. To achieve a similar safety margin for both the specimens with and without DCBs, the axial compressive bearing capacity of the specimens with DCBs can be determined according to the current design codes and considering a reduction factor of 0. 9.关键词
薄壁方钢管/废弃混凝土/短柱/轴压试验/轴压承载力Key words
square thin-walled steel tube/demolished concrete/stub column/axial test/axial compressive bearingcapacity分类
建筑与水利引用本文复制引用
吴波,张金锁,赵新宇..薄壁方钢管再生混合短柱轴压性能试验研究[J].建筑结构学报,2012,33(9):30-37,8.基金项目
国家杰出青年科学基金项目 （）
国家科技支撑计划子课题 （）
广东省科技计划项目 （）
亚热带建筑科学国家重点实验室项目 （）
中央高校基本科研业务费项目 （）
