论文部分内容阅读
异形截面多腔钢管混凝土柱截面形状不规则,受力复杂,其承载力不能按常规钢管混凝土柱计算方法计算。基于已有的6个两类截面的异形截面多腔钢管混凝土巨型柱轴压承载力试验结果,在分析评价国内外规范或规程承载力计算方法基础上,对异形截面多腔钢管混凝土柱轴压承载力计算方法进行研究。结果表明:相关规范或规程中按非圆形截面钢管混凝土柱计算公式所得轴压承载力大多低于试验值,偏于安全;基于Mander约束混凝土模型,将混凝土划分为有效和非有效约束区,提出了考虑折减约束效应的承载力计算式,计算所得承载力值略高于实测值,但相对差值在5%以内。
The cross-section shape of multi-cavity CFST columns with irregular cross-section is irregular, and the bearing capacity is not calculated according to the calculation method of CFST column. Based on the test results of 6 axial compressive load tests of special-shaped cross-section multi-storeed CFST column with two types of cross-sections, based on the analysis and evaluation of the calculation method of load-carrying capacity of code or procedure at home and abroad, Bearing capacity calculation method. The results show that the compressive strength of the CFST columns obtained from the calculation formula for CFST columns with non-circular cross-section is mostly lower than the test values in the relevant codes and procedures, which is biased to safety. Based on the Mander-constrained concrete model, the concrete is divided into effective and ineffective constrained zones, The calculation formula of bearing capacity considering restraint restraint effect is proposed. The calculated bearing capacity value is slightly higher than the measured value, but the relative difference is within 5%.