门式钢框架结构非线性爆炸响应  

Nonlinear Blast Response of Steel Frame Structures

作　　者：魏德敏[1] 黄启超 

机构地区：[1]华南理工大学土木与交通学院,广东广州510640

出　　处：《防灾减灾学报》2017年第3期5-14,共10页Journal of Disaster Prevention And Reduction

摘　　要：采用ALE多物质流固耦合方法模拟爆炸荷载,对门式钢框架结构在内部爆炸荷载作用下的动力响应全过程进行了计算分析。分析中考虑了爆炸源的水平爆距和放置高度对框架结构动力响应的影响。研究结果表明,当爆炸源的放置高度较低时,水平爆距对框架柱的动力响应影响较大,而对框架梁响应影响较小;当爆炸源的水平爆距一定时,框架梁的动力响应随着爆炸高度的提高而增大。通过计算结果的分析对比得到使框架结构发生最大响应的最不利爆炸位置。In this paper, the blast loading is simulated by use of ALE multi-material fluid-solid coupling method, and the whole process of dynamic response of single-span steel frame structures under internal blast loading is analyzed, the effect of the horizontal distance and the position height of the explosive on the structural response is investigated. The analysis results indicate that the horizontal explosive distance causes more affection on columns than the beam when the explosive height is lower, and the dynamic response of the beam increases with the raise of the explosive height when the explosive distance remains the same. Through analysis and comparison, most unfavorable locations of the explosive causing the maximum dynamic response of the frame structure are given.

关 键 词：爆炸荷载 钢框架 非线性响应 

分 类 号：P315.9[天文地球—地震学] TU375.4[天文地球—固体地球物理学]