配筋方钢管混凝土短柱受压试验和承载力计算  

Axial compression test and calculation of bar-reinforced concrete filled square steel tubular stub column

作　　者：张信龙 陈勇[1] 刘庆东[1] 张玉琢 ZHANG Xinlong;CHEN Yong;LIU Qingdong;ZHANG Yuzhuo(China Northeast Architectural Design and Research Institute Co.,Ltd.,Shenyang 110000,China;College of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]中国建筑东北设计研究院有限公司,辽宁沈阳110000 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《混凝土》2020年第12期11-14,20,共5页Concrete

基　　金：十三五国家重点研发计划(2017YFC0703301)。

摘　　要：通过对不同配筋率的配筋方钢管混凝土短柱受压试验研究,在记录柱子的试验过程和静力性能变化后,给出了该类柱子轴压承载力和试件变形的结果。结果表明,相比配筋率ρ=1.45%试件而言,ρ=3.26%试件承载力提高5%左右,轴压刚度有很大程度的提高,平均提高近20%,延性有一定程度的改善。最终,讨论了方形截面的配筋钢管混凝土短柱受压承载力的计算方法,依据国内外相关规范/规程对其进行了计算,并在规范GB 50936—2014相关计算式基础上给出了简化计算式。Through the compression test of reinforced square concrete-filled steel tube short columns with different reinforcement ratios,after recording the test process of the column and the change of static performance,the axial compression bearing capacity of the column and the deformation results of the specimen are given.The results show that,compared with the reinforcement ratioρ=1.45%,the bearing capacity ofρ=3.26%is increased by about 5%,the axial compression stiffness is greatly improved,and the average increase is nearly 20%,and the ductility is certain improvement.Finally,the calculation method of the compressive bearing capacity of reinforced concrete-filled steel tubular short columns with square cross-sections is discussed,and it is calculated according to relevant codes and regulations at home and abroad,and simplified calculations are given on the basis of the relevant formulas of the standard GB 50936:2014 formula.

关 键 词：配筋钢管混凝土 方形短柱 轴压试验 极限承载力 

分 类 号：TU528.571[建筑科学—建筑技术科学]