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5. 侧向冲击下不同长细比薄壁方钢管-砂卵石柱动力响应分析

侧向冲击下不同长细比薄壁方钢管-砂卵石柱动力响应分析

来源 :防护工程 | 被引量 : 0次 | 上传用户：kathleen350191539

【摘 要】

：

以长细比为变量开展了薄壁方钢管-砂卵石柱侧向冲击试验,分析了冲击力时程曲线、试件的破坏形态以及残余变形量,并结合损伤评估准则分析了长细比与柱损伤度的关系.结果表明:在侧向冲击荷载作用下,各试件的波动段平台值和作用时间有显著的差异,长细比越大,平台值越小,作用时间越长;在竖向荷载作用下,试件损伤度随着长细比增大而呈现先增大后减小趋势,且受损试件在达到极限承载力值后出现缓慢过渡阶段.

【作 者】

：

陈代果 马宏昊 沈兆武 邓勇军 徐刚 

【机 构】

：

中国科学技术大学中国科学院材料力学行为和设计重点实验室,安徽 合肥230026;工程材料与结构冲击振动四川省重点实验室,四川 绵阳621000;中国科学技术大学中国科学院材料力学行为和设计重点实验室,

【出 处】

：

防护工程

【发表日期】

：

2022年1期

【关键词】

：

长细比 砂卵石 薄壁方钢管柱 冲击荷载 损伤度 

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以长细比为变量开展了薄壁方钢管-砂卵石柱侧向冲击试验,分析了冲击力时程曲线、试件的破坏形态以及残余变形量,并结合损伤评估准则分析了长细比与柱损伤度的关系.结果表明:在侧向冲击荷载作用下,各试件的波动段平台值和作用时间有显著的差异,长细比越大,平台值越小,作用时间越长;在竖向荷载作用下,试件损伤度随着长细比增大而呈现先增大后减小趋势,且受损试件在达到极限承载力值后出现缓慢过渡阶段.

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