圆钢管再生混凝土短柱计算方法

为了对圆钢管再生混凝土短柱的计算公式进行研究,建立了圆钢管再生混凝土轴压短柱有限元模型,并验证了模型的正确性.使用四种规范对13根圆钢管再生混凝土短柱有限元模型进行了计算分析,结果表明:规范ACI(2005)、规范ASIC(2005)和规范AIJ(1997)对于圆钢管再生混凝土轴压短柱的计算结果偏安全,但精确度较低;规范(GB 50936-2014)的计算结果不仅偏安全,而且计算精确度较高,但此规范未考虑骨料取代率的影响.对规范(GB 50936-2014)中的公式进行了修正,提出了修正系数θ,并验证了修正系数的正确性.

Calculation methods for recycled aggregate concrete filled circular steel tubular short columns

In order to study the calculation methods for the recycled aggregate concrete filled circular steel tubular short columns, a finite element model for the recycled aggregate concrete filled circular steel tubular short columns under axial compression was established, and the correctness of the model was verified. The finite element model for 13 recycled aggregate concrete filled circular steel tubular short columns was calculated and analyzed with four specifications. The results show that the calculation results of recycled aggregate concrete filled circular steel tubular short columns according to ACI(2005), ASIC(2005)and AIJ(1997)specifications are relatively safe, but the accuracy is relatively lower. The calculation results according to(GB 50936-2014)specification are not only safe, but also the accuracy is higher, this specification does not consider the effect of aggregate replacement rate, nevertheless. Therefore, the formula of(GB 50936-2014)specification is modified, a correction factor θ is proposed and its correctness was verified.