方钢管约束钢筋混凝土轴压短柱试验研究与分析  

Experiment and analysis on square tubed reinforced concrete stub columns under axial compression

作　　者：周绪红[1] 甘丹[1] 刘界鹏[1,2] 张素梅[3] 

机构地区：[1]兰州大学土木工程与力学学院,甘肃兰州730000 [2]哈尔滨工业大学建筑设计研究院,黑龙江哈尔滨150090 [3]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《建筑结构学报》2011年第2期68-74,共7页Journal of Building Structures

基　　金：国家自然科学基金项目(50708027)

摘　　要：进行了20个方钢管约束钢筋混凝土短柱的轴压力学性能试验研究,试验的主要参数为钢管宽厚比(50,70和100)和混凝土强度(C50,C80)。试验结果表明:方钢管约束钢筋混凝土柱中被分隔钢管的高度对其轴压承载力和延性无明显影响。随钢管宽厚比增大和混凝土强度的提高,轴压短柱的延性降低。采用弹塑性应力分析方法对钢管进行了全过程应力分析,分析结果表明,方钢管约束钢筋混凝土轴压短柱的峰值荷载点并不对应钢管的屈服点,钢管在轴压短柱达到峰值荷载后屈服。根据试验结果和钢管的应力分析结果,建立了方钢管约束钢筋混凝土短柱的轴压承载力计算式,试验结果与计算结果吻合良好。并提出了设计建议。The behavior of 20 square tubed reinforced concrete（STRC） columns was investigated experimentally under static axial compression.The parameters in the study included the width-thickness ratio（50,70 and 100） of the steel tubes and the compressive strength of concrete（C80 and C50）.The test results indicate that the height of separated tubes in a STRC column affects little on the axial load strength and ductility of STRC stub columns.The ductility of STRC columns decreases as the compressive strength of concrete and width-thickness ratio of the steel tube increases.Elasto-plastic analysis on the steel tube during the loading procedure is carried out on the steel tube,and the analysis results indicate that the steel yielded after the peak load point.A design equation to calculate the axial load strength of STRC stub columns as well as design advices is proposed in this paper.

关 键 词：方钢管约束钢筋混凝土 短柱 宽厚比 静力试验 轴压承载力 

分 类 号：TU528.59[建筑科学—建筑技术科学] TU317.1