简支T梁在爆炸冲击下的损伤研究  

Analysis of simply supported T beam damage under explosion load

作　　者：高翔 梁栋[2] 陈璐 

机构地区：[1]天津市交通运输工程质量安全监督总站,天津300384 [2]河北工业大学土木与交通学院,天津300401 [3]天津市昊安安全卫生评价监测有限公司,天津300401

出　　处：《青岛理工大学学报》2016年第5期26-31,共6页Journal of Qingdao University of Technology

基　　金：天津市自然科学基金重点项目(12JCZDJC28900)

摘　　要：针对爆炸荷载对桥梁的损伤,以市内轻轨交通常用的简支T梁为例,采用非线性显式动力学分析软件,对某钢筋混凝土T梁进行了爆炸作用下的损伤研究.讨论了炸药当量、炸药相对于梁的位置以及比例距离等参数对梁体损伤的影响.分析结果表明,减小比例距离、增大炸药当量和将炸药放置在接近梁端的上部这3种情况将加剧钢筋混凝土梁的损伤.Considering the damage to the bridge of blast loading, a simple supported T beam, which is commonly used in the city＇s light rail transit, is used as an example. Using nonlinear explicit dynamic analysis software, the damage of a reinforced concrete T beam is studied. The influence of the parameters such as TNT equivalent and the position of TNT and the proportional distance is discussed in this paper. The analysis results show that the three kinds of conditions, such as reducing the proportion distance, increasing the equivalent of the explosive equivalent and placing the explosive in the upper part of the beam end, will aggravate the damage of the reinforced concrete beam.

关 键 词：损伤分析 爆炸模拟 钢筋混凝土梁 比例距离 炸药当量 

分 类 号：TU312.3[建筑科学—结构工程]