保持砂卵石压实系数在大于87．7％的范围，对两组6根薄壁方钢管-砂卵石短柱的轴压静力性能进行了试验研究，分析了试件的破坏形态、极限承载力、轴向荷载-位移曲线以及轴向荷载-应变曲线等数据。试验结果表明：（1）薄壁方钢管-砂卵石短柱的破坏模式均为局部失稳破坏，且破坏后砂卵石随钢管变形而变形；（2）薄壁方钢管-砂卵石短柱轴向荷载-位移曲线根据钢管与砂卵石分担荷载情况大致可以分为钢管主要受力阶段、砂卵石压实阶段、砂卵石主要受力阶段、破坏阶段4个阶段；（3）增加壁厚能增强薄壁钢管与砂卵石的相互作用。%Under keeping the compaction factor of sandy pebble is greater than the suggestion of the range of 87 .7%, take static experimental study on the axis pressure mechanical property of two groups of six sandy -pebble-filled thin-walled square steel tubular short columns .The failure characteristics , the ultimate bearing capacity , the load-strain curves and the load -compression displacement curves of dif-ferent test specimens were comparatively analyzed .The experimental results indicate that ( 1 ) thin -walled square steel tube -sandy pebble short column failure mode are local buckling failure , the de-struction of the sand and gravel with deformed steel deformation ;(2) Thin-walled square steel tube -sandy pebble short column axial load -displacement curve according to the steel tube and sandy pebble all share the load situation can be divided into four stages: main stress on steel stage , compaction on sandy pebble stage , main stress on sandy pebble stage , failure stage;( 3 ) Increasing the wall thickness can significantly enhance the interaction of thin -walled steel pipe with sandy pebble .
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