内填砂卵石薄壁方钢管柱轴压性能试验研究  

EXPERIMENTAL STUDY OF PERFORMANCE OF AXIALLY COMPRESSED SANDY PEBBLE FILLED THIN-WALLED SQUARE STEEL TUBULAR COLUMNS

作　　者：刘欢[1] 姚勇[1] 褚云朋[1] 邓勇军[1] 苏泽红[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《工业建筑》2013年第9期120-123,148,共5页Industrial Construction

基　　金：四川省科技厅科技支撑计划项目(2011GZ0043);西南科技大学实验室开放基金项目(13xnkf41)

摘　　要：以砂卵石压实度为主要变化参数,对10根内填砂卵石薄壁方钢管柱的轴压力学性能进行静力试验研究,对比分析不同试件的承载力、荷载-应变曲线、破坏特征及破坏机理。试验结果表明:空心方钢管柱及内填较小压实度砂卵石薄壁方钢管柱的承载力较低,钢材未达到屈服强度,管壁就已经发生局部屈曲,钢材高强性能未能得到充分发挥;较大压实系数的砂卵石参与受力并与管壁共同作用,有效延缓了钢管管壁的局部屈曲,大幅提高了薄壁方钢管柱的极限承载力,可改善柱的整体稳定性。而且这种新型组合柱具有可重复利用性良好、经济环保的特点。Using the compactness of sandy pebble as main parameter, static experimental study on the axial compressive mechanical property of ten sandy-pebble-filled thin-walled square steel tubular columns, was carried out to analyze comparatively the load-carrying capacity, the load-strain curves, failure characteristics and mechanism of different test specimens. The experimental results indicate that the load-carrying capacities of empty and low- compactness sandy-pebble-filled thin-walled square steel tubular column were low, local buckling of tube wall occurred prior to steel yielding, resulting in steel performance failing to get into full play. Compared with square steel tubular stub columns that mentioned above, the co-action of the higher-compactness sandy pebble and tube wall can effectively delay the local bucking of steel tube wall and enhance greatly the ultimate load-carrying capacity and improve the global stability of the columns. And what＇ s more, this new type of composite column has good repeatable utilization, as well as economic and environmental characteristics.

关 键 词：薄壁方钢管柱 静力试验 压实系数 局部屈曲 经济环保 

分 类 号：TU398.9[建筑科学—结构工程]