摘要
进行了20个圆钢管约束钢筋混凝土短柱的轴压力学性能试验研究,试验中的主要参数为钢管径厚比(50、70和100),混凝土强度(C50和C80)和钢管屈服强度(Q235和Q345)。试验结果表明:圆钢管约束钢筋混凝土柱中被分隔钢管的高度对构件的轴压承载力和延性无明显影响;随钢管径厚比增大和混凝土强度的提高,构件的延性降低;随钢管屈服强度的提高,构件的轴压承载力提高,但钢管屈服强度对构件的延性无明显影响。对钢管的应力分析结果表明,圆钢管约束钢筋混凝土轴压短柱的峰值荷载点对应于钢管的屈服点。根据试验结果和钢管的应力分析结果建立了圆钢管约束钢筋混凝土短柱的轴压承载力公式,提出了设计建议。
The behavior of 20 circular tubed reinforced concrete （CTRC） columns was investigated experimentally under static axial compression. The parameters in the study include the diameter-to-thickness ratio of the steel tube, the compressive strength of concrete （C80 and C50） and grade of the steel tube （Q235 and Q345） The test results indicate that the height of separated tubes in a CTRC column affects little on the axial load strength and ductility of CTRC stub columns. The ductility of CTRC columns decreases as the diameter-to-thickness ratio and the increase of concrete compression strength. The axial load strength of CTRC columns increases as the yield strength of the steel tube increases, while the yield strength of the steel tube affects little on the ductility of CTRC columns. The results of the elastic-plastic analysis on the steel tube indicate that the steel yields at the peak load point. A design equation to calculate the axial load strength of CTRC stub columns as well as design advices was proposed.
出处
《工程力学》
EI
CSCD
北大核心
2009年第11期53-59,共7页
Engineering Mechanics
基金
国家自然科学基金项目(50708027)
关键词
圆钢管约束钢筋混凝土
短柱
径厚比
轴压承载力
延性
circular tubed reinforced concrete （CTRC）
stub column
diameter-to-thickness ratio
axial load strength, ductility
