INFLUENCE OF SLENDERNESS RATIO UPON BEHAVIOR OF LIGHTWEIGHT AGGREGATE CONCRETE FILLED STEEL TUBE COLUMN UNDER AXIAL COMPRESSION
-
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。Abstract: 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 results.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.
-
蔡绍怀.现代钢管混凝土结构[M].北京:人民交通出版社,2003. [2] 胡曙光,王发洲.轻集料混凝土[M].北京:化学工业出版社,2006. [3] 吉伯海,王晓亮,马敬海,等.钢管高强轻集料混凝土短柱轴压性能的试验研究[J].建筑结构学报,2005,26(5):60-65. [4] 吉伯海,陈甲树,王晓亮,等.受荷方式对钢管轻集料混凝土短柱轴压性能的影响[J].东南大学学报,2006,34(4):590-595. [5] 吉伯海,胡正清,陈甲树,等.圆钢管轻集料混凝土构件抗弯性能的试验研究[J].土木工程学报,2007,40(8):35-40. [6] 吉伯海,周文杰,王晓亮.钢管轻集料混凝土中长柱轴压性能的试验研究[J].建筑结构学报,2007,28(5):118-123. [7] 吉伯海,周文杰,胡正清,等.核心混凝土性能对钢管混凝土稳定系数的影响研究[J].世界桥梁,2007(3):39-41. [8] 潘友光,钟善桐.钢管混凝土轴心受压构件稳定承载力的理论分析[J].建筑结构学报,1992,13(1):43-52. [9] 黄平明,张文征,刘国林,等.内填式钢管混凝土构件受箍机理分析[J].西安公路交通大学学报,2001,21(4):43-45. [10] 韩林海.钢管混凝土结构理论与实践[M].北京:科学出版社,2004. [11] 丁发兴,余志武,蒋丽忠.圆钢管混凝土轴压中长柱的承载力[J].中国公路学报,2007,20(4):65-70.
点击查看大图
计量
- 文章访问数: 65
- HTML全文浏览量: 6
- PDF下载量: 52
- 被引次数: 0