低速侧向冲击下钢管混凝土柱挠度研究  

THE DEFLECTION OF CONCRETE FILLED STEEL TUBULAR COLUMN UNDER LATERAL IMPACT AT LOW SPEED

作　　者：任够平[1] 李珠[1] 王蕊[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,山西太原030024

出　　处：《工程力学》2008年第5期170-175,共6页Engineering Mechanics

基　　金：国家自然科学基金面上项目(50578103);山西省自然科学基金项目(20031054)

摘　　要：从实验研究及数值分析两个方面对钢管混凝土柱在侧向冲击荷载作用下的横向挠度和挠曲线进行了实际测试和计算机仿真。采用落锤冲击实验,测定了试件的跨中最终挠度随冲击能量E、套箍系数ξ、约束类型的变化数据,讨论了变化规律,记录了冲击破坏状态。采用ANSYS/LS-DYNA程序模拟了跨中最终挠度和挠曲线,与实验结果有较好的一致性。The deflection of concrete filled steel tubular columns subjected to lateral impact load are studied. Three influence factors including impact energy, casing hoop steel coefficient and restrained ends type are measured in dropped hammer impact test. Furthermore, the relationships between final mid-span deflection and the three factors are found out and discussed respectively. Failure states are recorded. The final mid-span deflection and deflection curves are also simulated by using ANSYS/LS-DYNA. The results from numerical simulation agree well with experimental results.

关 键 词：钢管混凝土 侧向冲击 挠度 挠曲线 落锤 数值模拟 

分 类 号：O347.3[理学—固体力学] TU398[理学—力学]