摘要
为研究不同吊杆布置形式对拱桥破损安全性能的影响,本文采用ABAQUS有限元分析软件,针对平行双吊杆体系与斜交叉吊杆体系的拱桥,分别模拟计算了由于吊杆发生骤断而对拱桥剩余结构的瞬时冲击作用,并取得了两种体系的结构在断索冲击下的动力时程响应结果。通过动力分析,明确断索对两种体系拱桥产生的不利影响,研究吊杆骤断时拱桥的破损安全性能,以此对两种吊杆体系的破损安全性能进行比较。结果显示,斜交叉吊杆体系的破损安全性优于平行双吊杆体系。
In order to investigate the influence on failure-safety of arch bridge with different disposal of suspenders, the dynamic mechanical analysis of the transient impact under the sudden broken of the suspender on both the parallel double suspender system and inclined cross suspender system of the arch bridge are studied by finite element method respectively. The failure-safety of the arch bridge after the failure of the suspender is analyzed and the dynamic time history response of the remainder structure is obtained. That is, the disadvantage of the suspender sudden failure influence the arch bridge is discussed; the least acceptable safety of the arch bridge when some suspender breaks is studied; and the failure-safety of the arch bridge with the two suspender system are compared. The results show that the inclined cross suspender system has the better performance of failure-safety than the parallel double suspender system.
出处
《工程抗震与加固改造》
北大核心
2009年第3期16-20,15,共6页
Earthquake Resistant Engineering and Retrofitting
关键词
破损安全
平行双吊杆
斜交叉吊杆
吊杆骤断
瞬时冲击
failure-safety
parallel double suspender
inclined cross suspender
suspender sudden failure
transient impact
