爆破冲击荷载下混凝土T梁桥实验  

Experimental of concrete T beam bridge under blasting load

作　　者：蔡路军[1,2] 杜刚 高琴[1,2] 刘令 CAI Lu-jun;DU Gang;GAO Qin;LIU Ling(College of Science,Wuhan University of Science and Technology,Wuhan 430065,China;CRPCE-Blasting Technology Research Center,Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]武汉科技大学理学院,武汉430065 [2]中铁港航-武科大爆破技术研究中心,武汉430065

出　　处：《工程爆破》2018年第1期8-12,19,共6页Engineering Blasting

摘　　要：为了揭示爆破荷载作用下混凝土T梁桥的动态响应及破坏律,制作了两种不同纵向长度的混凝土T梁桥模型,测量T梁桥模型的应变值,以及爆炸前后模型的加速度值和声波速度,进行分析比较。研究表明,T梁桥模型的动态响应在横向1/4处比梁中心更敏感;纵向长度长的混凝土T梁桥在相同荷载作用下更容易发生破坏;混凝土T梁桥在存在损伤积累以后,梁肋板更容易先破坏;这为桥梁抢修和设计提供依据,提高其抗爆性。In order to research the dynamic response and failure law of concrete T-beam bridge under blasting load,two kinds of concrete T-beam bridge models with different longitudinal lengths were made.Strain value,acceleration value and sound velocity of the model before and after the explosion of T-beam bridge are measured and analyzed.The study shows that the dynamic response of the T-beam model is more significant in the horizontal 1/4 direction than in the beam center and under the same load,the longer the longitudinal length,the concrete T-beam bridge is more likely to damage;what’s more if there is accumulation of damage of concrete T-beam bridge,beam ribs are more likely to be destroyed firstly.These findings provide the basis for bridge repair and its improvement of antiknock performance.

关 键 词：爆炸荷载 混凝土T梁桥 动态响应 抗爆性 

分 类 号：U448.33[建筑科学—桥梁与隧道工程]