部分预应力混凝土梁抗冲击性能试验研究  

Experimental study on anti-impact properties of a partially prestressed concrete beam

作　　者：李砚召[1] 王肖钧[1] 郭晓辉[2] 曹海[2] 赵凯[1] 

机构地区：[1]中国科学技术大学力学和机械工程系,安徽合肥230026 [2]洛阳水利工程技术研究所,河南洛阳471023

出　　处：《爆炸与冲击》2006年第3期256-261,共6页Explosion and Shock Waves

摘　　要：通过在跨中施加一落锤冲击荷载的方法,研究了3根无粘结部分预应力混凝土梁的抗冲击性能,给出了典型的实测波形曲线,测得了无粘结部分预应力混凝土试验梁在落锤冲击荷载作用下的动态位移延性和极限承载能力,分析了落锤重力势能对预应力混凝土梁动力性能的影响,并根据相似模拟理论,得出了与试验梁相似的12 m跨度的实际无粘结部分预应力混凝土梁的极限抗冲击承载能力。肯定了无粘结部分预应力混凝土试验梁具有很好的抗冲击性能,不会发生脆性破坏,完全可用于大跨度地下结构。The dynamic displacement ductility and ultimate load-carrying capability of three partially-prestressed concrete （PPC） beams which were unbonded, were experimentally obtained by applying impact load to their middle with dropping hammers, and the typical measurement wave curves were given. Influences of a dropping hammer＇s gravitational potential energy on the dynamic properties of the PPC beam were analyzed. Based on the analog simulation theory, the impact-load-carrying capability of the real unbonded PPC beam with span 12 m was gained. Results show that the unbonded PPC beam＇s anti-impact properties are good, the fragile destruction will not happen, and the unbonded PPC beams can be used in wide-span underground structures.

关 键 词：爆炸力学 抗冲击性能 试验研究 预应力混凝土梁 动力特性 落锤 

分 类 号：O383[理学—流体力学]