摘要
利用DHR9401落锤式冲击试验机完成了两种不同边界约束条件下的12个热轧H型钢柱侧向冲击试验,试验中利用动态应变仪记录了冲击力时程曲线,并获得了试件的破坏形态和残余变形量。试验结果表明:热轧H型钢柱强轴在侧向冲击荷载的作用下,固-简约束边界务件的试件以发生整体弯曲变形为主,翼缘下支垫刚性平台约束边界的试件以撞击部位的局部屈曲变形为主;边界条件对试件的冲击力时程有显著影响;随着冲击能的增大,试件的残余变形增大,两者之间基本呈线性关系;试件在试验过程中表现出良好的延性性能和抗冲击性能。
Twelve hot-rolled H-shaped steel column specimens were tested under two different boundary conditions and lateral impact along their major axis using a DHR9401 drop-weight-impact-tester. Time-history curves and residual deformation of specimens were recorded. Based on the experimental data, the dynamic behaviors of steel columns were analyzed and discussed. The test results showed that the overall bending derformation occurs on fixed-simply supported specimens under lateral impact load; furthermore, for the specimens padded with a rigid constraint platform under their flange, local buckling deformation occurs at the collision position; boundary condition of a specimen has an obvious influence on its impact force time-history; overall bending deformation or local buckling deformation of specimens obviously increase with increase in impact energy, both of them reveal a linear relationship ; specimens exhibit a good antiimpact performance and ductility in tests.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第18期133-139,共7页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51108296)
太原理工大学2012年校青年基金项目(2012L015)
关键词
H型钢柱
侧向冲击
冲击能量
残余变形
H-type steel column
lateral impact
impact energy
residual deformation
