【摘要】：分析了現(xiàn)有鋼管混凝土平綴管格構(gòu)柱換算長細比計算方法的假定條件和計算式,并將各方法計算的極限承載力與試驗結(jié)果進行對比;以格構(gòu)柱剪切柔度理論為基礎(chǔ),對鋼管混凝土平綴管格構(gòu)柱各變形項與總剪切變形量的比值進行分析,指出現(xiàn)有換算長細比計算方法的不合理之處。借鑒鋼管混凝土(斜綴條)格構(gòu)柱換算長細比乘法算法的計算思路,在剪切系數(shù)計算式中采用考慮節(jié)點構(gòu)造參數(shù)影響的剪切柔度簡化計算式,擬合得到放大系數(shù)與剪切系數(shù)的關(guān)系式。結(jié)果表明:采用所提出的換算長細比計算方法及GB 50923—2013中穩(wěn)定系數(shù)計算方法得到的計算結(jié)果與試驗結(jié)果吻合良好,證明該方法簡單、實用且具有足夠的精度。
[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.
【作者單位】： 福州大學(xué)土木工程學(xué)院;西安建筑科技大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51178118)
【分類號】：TU398.9
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本文編號：2495272