轴压下方形钢管混凝土短柱承载力的计算  

The Calculation of Ultimate Strength for Axial-Loaded Square CFT Stub Columns

作　　者：孙刚[1] 卓献荣[1] 欧桂鑫 邱华耀 

机构地区：[1]仲恺农业工程学院城市建设学院,广东广州 [2]广州市中大科教职业培训学校,广东广州

出　　处：《土木工程》2018年第6期938-942,共5页Hans Journal of Civil Engineering

基　　金：广州市科技计划项目(201704020186);广东省大学生创新创业训练计划项目(201611347033)。

摘　　要：本文分析了方形钢管混凝土的受力机理,根据试验数据确定了方钢管的有效约束系数和纵向应力强度,并借鉴典型约束混凝土的强度理论确定了核心混凝土的单轴纵向强度,建立了方形钢管混凝土轴压短柱的承载力计算公式。用建议公式对36个试验试件进行承载力计算,计算结果与试验结果和规范计算结果吻合良好。The bearing mechanism of square concrete-filled steel tube stub column under axial load is ana-lyzed. The effective confining coefficient and lateral compressive stress of square steel tube are determined based on the experimental data. Then, the calculated equations of square CFT sub-jected to axial load are proposed according to the typical confined concrete theory. Finally, 36 specimens are calculated by the proposed equations, and the calculated results are in accordance with the experimental and normative ones very well.

关 键 词：方形钢管混凝土 有效约束系数 极限承载力 

分 类 号：TU3[建筑科学—结构工程]