（四川大学建筑与环境学院， 成都 610065）

［摘要］探究了桥梁在爆炸荷载下的动态响应以及模拟爆炸荷载下桥梁的损毁过程，选用了ANSYS软件建立桥梁、空气以及炸药模型，利用了通用显示动力分析程序LS-DYNA进行显示求解。分析了在爆炸过程中冲击波的传播规律,得到了关键桥梁单元的位移响应,模拟了全桥坍塌的损毁过程,探究了不同爆炸距离以及不同炸药量对桥梁动态响应的影响,并通过Tuler-Butcher损伤模型计算出了特定单元的损伤累计曲线。

［关键词］桥梁； 爆炸； 动态响应； 损伤累计； 坍塌模拟

中图分类号： TU997    文献标识码： A    文章编号： 1002-848X(2015)S2-0523-05

Numerical simulation of dynamic response and collapse of bridge under blast loading

Zhao Yi, Chen Huayan, Song Zulan, Zeng Xiangguo

(College of Architecture and Environmental, Sichuan University, Chengdu 610065, China)

Abstract: The dynamic response of bridge was explored and the damage process of bridge under explosion was simulated. ANSYS and the explicit dynamic analysis program LS-DYNA were chosen to build and compute the bridge, air and explosive models. Also, the characteristics of shock wave propagation were analyzed, and the displacement response of some specified elements was obtained. Besides, the failure and collapse process of the bridge was simulated, and then the influence caused by different explosion distances and different explosive quantities on dynamic response of the bridge was analyzed. Finally, according to the Tuler-Butcher damage rule, the damage accumulation curves of specified elements were obtained.

Keywords： bridge； blasting； dynamic response； damage accumulation； collapse simulation* 2014年四川大学大学生创新创业训练计划校级重点项目（20140139）。

作者简介：赵羿，本科，Email：371815604@qq.com。