【作者】 任够平； 李珠； 王蕊；

【Author】 REN Gouping LI Zhu WANG Rui (Taiyuan University of Technology,Taiyuan030024.Shanxi,China)

【机构】 太原理工大学建筑与土木工程学院；

【摘要】 采取 DHR-9401型落锤加载机对钢管混凝士短柱试件进行冲击实验,测得了试件冲击端部的轴向冲击力时程曲线、纵向应变时程曲线。将轴向冲击力时程曲线转化成横截面纵向平均应力时程曲线,与同一时刻的纵向应变相结合, 得到纵向平均应力-应变关系曲线。实验中改变了套箍系数和冲击速度两个参数,得到了钢管混凝土短柱在轴向冲击下的本构关系模型。更多还原

【Abstract】 The test on short concrete filled steel tubular columns is conducted through DHR-9401 dropped hammer impacting device.The time-history curve of axial impact force and time-history curve of longitudinal strain at impacted end are recorded.And the curve of longitudinal cross-sectional mean stress vs longitudinal strain is obtained by methods of converting time-history curve of axial impact force to that of longitudinal cross-sectional mean stress and combining longitudinal cross-sectional mean stress with longitudinal strain responded synchronously.In the experiment,two parameters including casing hoop steel coefficient and impact speed are changed.As a result,constitutive models for short concrete filled steel tubular columns under axial impact loading are found out.更多还原