田力^1,2, 胡建伟¹, 朱运华¹
AuthorsHTML:田力^1,2, 胡建伟¹, 朱运华¹
AuthorsListE:Tian Li^1,2, Hu Jianwei¹, Zhu Yunhua¹
AuthorsHTMLE:Tian Li^1,2, Hu Jianwei¹, Zhu Yunhua¹
Unit:1. 天津大学建筑工程学院，天津 300072；2. 滨海土木工程结构与安全教育部重点实验室(天津大学)，天津 300072
Unit_EngLish:1．School of Civil Engineering, Tianjin University, Tianjin 300072, China
2．Key Laboratory of Coast Civil Structure Safety(Tianjin University), Ministry of Education, Tianjin 300072, China
Abstract_Chinese:为研究钢筋混凝土剪力墙在近爆冲击波和破片联合作用下的动力响应, 应用非线性有限元软件LS-DYNA开展近爆冲击波和破片对钢筋混凝土剪力墙联合作用的数值模拟分析．同时, 通过参数化分析的方法, 探究了冲击波和破片联合作用下剪力墙高厚比、分布筋间距和炸药比例距离等因素对其动力响应的影响．研究表明：近爆作用下冲击波和破片的联合作用强于单一作用, 且联合作用要大于两者单一作用效果的线性叠加; 减小钢筋混凝土剪力墙的高厚比, 可以有效降低其水平位移响应, 且随着高厚比的减小, 水平位移响应减小速率加快; 减小钢筋混凝土剪力墙分布筋的间距, 可以有效降低其水平位移响应, 且随着分布筋间距的减小, 水平位移响应减缓程度有所降低; 增大炸药比例距离, 可以有效降低其水平位移响应, 且随着炸药比例距离的增大, 水平位移响应减缓程度有所增加．
Abstract_English:In order to investigate the dynamic response of RC shear wall subjected to the combined loading of close-range blast wave and fragment，numerical simulations were carried out for the analysis on the dynamic response of RC shear wall subjected to the combined loading of close-range blast wave and fragment by using nonlinear finite element analysis software LS-DYNA. At the same time，the influence of the height-thickness ratio，the distance of distribution bars and the scale distance of explosive on the dynamic response of the shear wall subjected to the combined loading of close-range blast wave and fragment are investigated by means of parametric analysis. The results show that the combined effect of blast wave and fragment is stronger than that of single action，and the combined effect is greater than the linear superposition of the two effects. Decreasing the height-thickness ratio can effectively reduce the horizontal displacement response, and the horizontal displacement response decreases with the decrease of the height-thickness ratio. Reducing the distance of distribution bars can effectively reduce the horizontal displacement response，and the degree of horizontal displacement response decreases with the decrease of the distance of distribution bars. Increasing the scale distance of explosive can effectively reduce the horizontal displacement response and the extent of the horizontal displacement response increases with the increase of the explosive distance.
Keyword_Chinese:钢筋混凝土剪力墙; 近爆; 冲击波; 破片; 联合作用
Keywords_English:RC shear wall; close-range explosion; blast wave; fragment; combined effects

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