###
DOI:
工程科学与技术:2011,43(6):15-19
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
爆炸荷载作用下桥梁动态响应及其损毁过程的数值模拟
(1.四川大学 建筑与环境学;2.重庆交通科研设计院)
Numerical Simulation of Dynamic Response and Damage Process for Bridge Under Blast Loading
(1.School of Architecture and Environment,Sichuan Univ.;2.Chongqing Communication Research and Design Inst.)
摘要
图/表
参考文献
相似文献
本文已被:浏览 2024次   下载 8
投稿时间:2011-01-31    修订日期:2011-02-21
中文摘要: 桥梁的设计通常考虑了地质和气候等环境条件,但并没有考虑结构抗爆方面的设计要求。利用大型通用有限元软件LS DYNA 3D对连续刚构桥在爆炸荷载作用下的动力响应进行数值计算,分析过程中考虑了空气冲击波的传播特性。通过调整炸药的位置和重量,得到了爆炸荷载作用下刚构桥跨中的位移响应、跨中Von Mises应力分布和结构破坏形态,模拟了桥梁承受爆炸后的坍塌过程,引入Tuler Butcher损伤模型,求得了特定单元的损伤累积曲线。这些计算方法和结论可以为工程实际提供参考。
中文关键词: 爆炸  动态响应  损伤容限  数值分析
Abstract:Usually the geological and the climate environmental conditions are considered in designing bridge, but the requirements according to antiknock design for bridge structures are neglected. In order to investigate the dynamic response and damage process of bridge under blast loading, the dynamic response of continuous rigid frame bridge suffering blast loading was simulated numerically by LS-DYNA software, and the characteristics of shock wave propagating in air were analyzed. Also, the response of displacement and the Von-Mises stress distribution around the middle of bridge were obtained, and then the failure state and collapse process of the bridge were showed. Based on the Tuler-Butcher damage rule, the damage accumulation curves of specified elements were obtained. The calculative method and results are referenced for the engineering practice.
文章编号:201100112     中图分类号:    文献标志码:
基金项目:桥梁工程结构动力学国家重点实验室开放基金资助项目(201102);教育部创新团队计划资助项目(ITR1027)
作者简介:
引用文本:
陈华燕,曾祥国,朱文吉,廖异,唐光武.爆炸荷载作用下桥梁动态响应及其损毁过程的数值模拟[J].工程科学与技术,2011,43(6):15-19.
Chen Huayan,Zeng Xiangguo,Zhu Wenji,Liao Yi,Tang Guangwu.Numerical Simulation of Dynamic Response and Damage Process for Bridge Under Blast Loading[J].Advanced Engineering Sciences,2011,43(6):15-19.