建筑结构学报2024，Vol.45Issue(1)：27-35,9.DOI:10.14006/j.jzjgxb.2022.0941
爆炸荷载作用下钢梁动力响应的相似分析方法
A similarity analysis method for dynamic response of steel beam under blast loading
摘要
Abstract
During the testing of scaled models to simulate a nuclear explosion using a chemical explosion,it is necessary to implement specific measures such as restraint and sealing to prolong the duration of the chemical explosion.Although these measures ensure geometric similarity in structural deformation,they also amplify the testing costs and complexities,particularly when scaling down the model,resulting in significant inaccuracies.To address this limitation,this paper proposes a novel method for similarity analysis of the dynamic response of steel beams under blast loading.The proposed method's accuracy was validated through numerical calculations,revealing that geometric similarity can be maintained during the elastic response stage,subject to certain conditions,including the use of the same material for both the scaled model and the prototype,similarity in geometric shape,and equivalence of the equivalent static load between the chemical explosion model and the prototype structure.However,the maximum mid-span displacement fails to satisfy geometric similarity during the plastic response stage.Under the condition that the duration of the scaled model's explosion load is longer than the minimum action time,the similarity relationship between the model and the prototype can be expressed as the product of the geometric similarity coefficient and the ductility ratio coefficient,with the analytical expression for the latter provided.关键词
钢梁/爆炸荷载/相似分析/动力响应/等效静载/延性比系数Key words
steel beam/blast load/similarity analysis/dynamic response/equivalent static load/ductility ratio coefficient分类
建筑与水利引用本文复制引用
刘思嘉,陈力,冯彬..爆炸荷载作用下钢梁动力响应的相似分析方法[J].建筑结构学报,2024,45(1):27-35,9.基金项目
国家自然科学基金项目(51978166),华南理工大学亚热带建筑科学国家重点实验室开放基金(2020ZA02). （51978166）
