钢管混凝土平缀管格构柱换算长细比计算方法

发布时间：2019-06-08 12:07

【摘要】：分析了现有钢管混凝土平缀管格构柱换算长细比计算方法的假定条件和计算式,并将各方法计算的极限承载力与试验结果进行对比;以格构柱剪切柔度理论为基础,对钢管混凝土平缀管格构柱各变形项与总剪切变形量的比值进行分析,指出现有换算长细比计算方法的不合理之处。借鉴钢管混凝土(斜缀条)格构柱换算长细比乘法算法的计算思路,在剪切系数计算式中采用考虑节点构造参数影响的剪切柔度简化计算式,拟合得到放大系数与剪切系数的关系式。结果表明:采用所提出的换算长细比计算方法及GB 50923—2013中稳定系数计算方法得到的计算结果与试验结果吻合良好,证明该方法简单、实用且具有足够的精度。
[Abstract]:The assumptions and formulas of the existing calculation methods for the conversion slenderness ratio of concrete-filled steel tubular columns are analyzed, and the ultimate bearing capacity calculated by each method is compared with the test results. Based on the theory of shear flexibility of lattice columns, the ratio of each deformation term to the total shear deformation of concrete-filled steel tubular columns is analyzed, and the irrationality of the existing calculation methods of conversion slenderness ratio is pointed out. Based on the calculation idea of conversion slenderness ratio multiplication algorithm for concrete-filled steel tubular (skew strip) lattice columns, the simplified formula of shear flexibility considering the influence of joint structural parameters is adopted in the calculation formula of shear coefficient. The relationship between magnification coefficient and shear coefficient is obtained by fitting. The results show that the calculated results are in good agreement with the experimental results by using the proposed calculation method of conversion slenderness ratio and the calculation method of stability coefficient in GB 50923 / 2013. It is proved that the method is simple, practical and accurate.
【作者单位】： 福州大学土木工程学院;西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51178118)
【分类号】：TU398.9
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本文编号：2495272