复式空心钢管混凝土柱抗爆性能及损伤研究  

Explosion-resistance behavior and damage assessment of a duplex hollow CFST column subjected to blast loading

作　　者：崔莹[1,2] 赵均海[3] 张常光[3] 孙珊珊[3] 陈兵[1] 

机构地区：[1]西安石油大学机械工程学院,西安710065 [2]西北工业大学航空学院,西安710072 [3]长安大学建筑工程学院,西安710061

出　　处：《振动与冲击》2015年第21期188-193,216,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(41202191);教育部博士点基金项目(20110205130001);中国博士后科学基金面上项目(2012M520079、2013T60868);陕西省自然科学基金项目(2011JM7002);陕西省教育厅专项科研计划项目(15JK1501)

摘　　要：通过爆炸试验,对复式空心钢管混凝土柱抗爆性能及损伤程度进行研究,并结合所得试验数据进行数值模拟,分析并建立柱的损伤评估准则。结果表明:在折合距离为0.14m/kg^(1/3)试验条件的爆炸荷载作用下,复式空心钢管混凝土柱迎爆面柱中发生了明显的塑性弯曲变形;柱迎爆面压力峰值柱中最高、柱底次之、柱顶最小,且爆炸冲击波对迎爆面柱中造成的破坏最为强烈、柱底次之、柱顶最小;柱端部节点强度与构件整体强度协调对提升复式空心钢管混凝土柱的抗爆性能尤为重要。最终建立了基于固端约束下复式空心钢管混凝土柱中挠度的超压-冲量(P-I)损伤准则及判定公式。Test analysis and numerical simulation method were integrated to evaluate dynamic response and damage of a duplex hollow CFST column subjected to blast loading.A pressure-impulse damage evaluation criterion for the duplex hollow CFST column was defined by analyzing the test data.The results showed that under the blast loading for the test condition of the converted distance of 0.14m /kg^1 /3 ,the plastic bending deformation occurs on the surface facing the explosion of the duplex hollow CFST column;the peak pressure in the middle of the column is the highest,the peak pressure at the bottom of the column is higher than that at the top of the column,the latter is the lowest;with the analysis of the duration of the positive pressure,the damage of the middle of the column is the most serious;so,it is important to coordinate the ends＇strength and the whole column＇s strength in order to enhance the explosion-resistance performance of the duplex hollow CFST column.Finally,a pressure-impulse damage criterion based on the deflection of the fixed-end duplex hollow CFST column was defined,and a mathematical formula to generate pressure-impulse diagram （P-I curve） was also established.

关 键 词：爆炸力学 复式空心钢管混凝土柱 爆炸试验 数值模拟 超压-冲量(P-I)曲线 

分 类 号：TU398.9[建筑科学—结构工程]