摘要
该文中对套箍系数分别为1、1.15和1.9的两端简支钢管混凝土梁在侧向冲击载荷作用下的动力响应进行了实验和理论研究。动载试验在DHR-9401落锤式冲击实验机上进行,实验中得到了试件破坏模态和冲击力时程曲线等特征量。进而基于实验研究结果,并考虑撞击时局部变形的影响,建立了局部变形和整体变形的关系,推导出钢管混凝土梁在低速冲击下整体变形的计算公式,其结果与实验结果较为吻合,并为临界破坏冲击能的计算提供了方法。
The experimental and theoretical studies on simply supported beams of concrete filled steel tubes with different casing hoop steel coefficients were completed. The experimental researches were done through a DHR-9401 drop hammer test machine. During testing, residual deformation modes, the time history curve of impact loads were recorded. On the basis of the experimental results and consideration of the local deformation effect on the integral bending deformation, the relationship between local damage and integral bending beam deformation is established, the dynamic transverse deflection is achieved and it is in the fair agreement with the experimental one.
出处
《工程力学》
EI
CSCD
北大核心
2008年第6期75-80,93,共7页
Engineering Mechanics
基金
国家自然科学基金资助项目(505781003
10772129)
山西省自然科学基金资助项目(20031054)
关键词
钢管混凝土
侧向冲击
动力响应
破坏载荷
套箍系数
lateral impact
concrete filled steel tube
dynamic response
failure load
casing hoop steel coefficient
