长细比对钢管轻集料混凝土轴压柱受力性能的影响  

INFLUENCE OF SLENDERNESS RATIO UPON BEHAVIOR OF LIGHTWEIGHT AGGREGATE CONCRETE FILLED STEEL TUBE COLUMN UNDER AXIAL COMPRESSION

作　　者：傅中秋[1] 吉伯海[1] 

机构地区：[1]河海大学土木工程学院,南京210098

出　　处：《工业建筑》2010年第1期112-115,共4页Industrial Construction

基　　金：江苏省自然科学基金(BK2008359);江苏省普通高校研究生科研创新计划项目(CX09B-159Z)

摘　　要：基于钢管轻集料混凝土轴压柱的试验结果,分析长细比对钢管轻集料混凝土破坏形态、极限承载力的影响,并将界限长细比及稳定系数的经验公式计算结果与试验实测结果进行对比。分析结果表明:界限长细比作为钢管轻集料混凝土柱弹塑性和弹性破坏的分界点,可以应用Euler公式计算,其计算结果与试验相吻合,同时低于钢管普通混凝土经验公式计算结果;相同截面参数条件下,长细比越大,钢管轻集料混凝土的极限承载力和稳定系数越低;钢管轻集料混凝土实测稳定系数高于钢管普通混凝土经验公式计算结果。Based on the results of axial compressive tests of lightweight aggregate concrete filled steel tube （LACFST） columns, the influence of slenderness ratio on failure mode and bearing capacity are studied. The bound slenderness ratio and stability factor calculation results of the empirical formula are compared with the test resuhs. Analyses show that bound slenderness ratio as the demarcation of elastic-plastic damage and elastic damage mode can be calculated by Euler formula. The result of Euler formula is lower than that of the empirical formula. And the larger the slenderness ratio is, the lower the ultimate bearing capacity and stability factor are.

关 键 词：钢管轻集料混凝土 EULER公式 长细比 极限承载力 

分 类 号：TU398.9[建筑科学—结构工程]