【作者】 王铁成； 张建辉； 张洪波；

【Author】 WANG Tie-cheng ZHANG Jian-hui ZHANG Hong-bo (School of Civil Engineering,Tianjin University,Tianjin 300072,China)

【机构】 天津大学建筑工程学院；

【摘要】 本文从方钢管混凝土柱单向压弯的情况出发,采用极限平衡法,分析方钢管混凝土柱处于极限状态时的平衡条件.在方钢管混凝土截面名义承载力计算的基础上,提出合理的假定考虑钢管对核心混凝土的约束作用,推导截面强度相关关系,即弯矩-轴力(M-N)相关曲线,并用试验进行验证.为简化计算,方便设计使用,本文还提出便于计算的强度计算公式.更多还原

【Abstract】 The equilibrium condition of concrete filled square steel tubular beam-columns is analyzed with critical theory.Based on the current method of calculation of the nominal bearing capability,a reasonable as- sume is brought forward for considering the increase of concrete strength due to confinement by the steel tube, and N-M correlation for cross section strength of concrete filled square steel tubular columns is deduced.To verify the validity,experimental data are compared with the calculated results.Furthermore,the simplified calculation formula for compression-bending members is put forward.更多还原