摘要
为了研究钢管再生混凝土偏压柱的受力性能,设计15个试件进行静力单调加载试验,考虑了再生粗骨料取代率、长细比和偏心距3个变化参数。观察试件的破坏形态,获取试件受力的全过程曲线,给出截面应变的分布情况,分析各变化参数对钢管再生混凝土偏压柱受力性能的影响,利用相关理论方法计算钢管再生混凝土偏压柱的极限承载能力。研究结果表明:钢管再生混凝土偏压柱与普通钢管混凝土偏压柱的受力过程及破坏形态相似,钢管最终表现为鼓曲破坏;钢管再生混凝土偏压柱具有较高的承载能力和良好的变形性能;偏心距、长细比对钢管再生混凝土偏压柱的受力性能影响显著,而再生粗骨料取代率对其影响不大。
To study the mechanical behavior of recycled aggregate concrete-filled circular steel tube（RACFCST） columns under eccentric loading,15 specimens with different replacement ratio of recycled coarse aggregate,slenderness ratio and eccentricity were tested under the monotonic static loading.The failure modes were observed,and then the curve of the entire loading process as well as the strain distribution over the cross section were obtained.The influence of varying parameters on the mechanical behavior of RACFCST columns was analyzed,and then the ultimate bearing capacity was calculated using existing theories.It is shown that about the failure process and failure mode RACFCST columns are similar to the eccentrically loaded concrete-filled circular steel tube columns,in which the circular steel tube fails eventually in the drum-like buckling mode.It is found that RACFCST columns have high bearing capacity and good deformation performance,and the influences of eccentricity and slenderness ratio on the mechanical behavior of RACFCST columns are obvious,while the influence of aggregate replacement ratio is comparatively unobvious.
出处
《土木工程学报》
EI
CSCD
北大核心
2012年第10期72-80,共9页
China Civil Engineering Journal
基金
国家自然科学基金(50908057)
"八桂学者"建设工程专项经费资助
广西理工科学实验中心重点项目(LGZX201102)
关键词
钢管再生混凝土
受力性能
取代率
长细比
偏心距
recycled aggregate concrete-filled circular steel tube
mechanical behavior
replacement ratio
slenderness ratio
eccentricity
