1. 北京工业大学 城市建设学部, 北京 100124
2. 防灾科技学院 土木工程学院, 河北 廊坊 065201
*邮箱: beerli@vip.sina.com
收稿:2023-08-02,
网络出版:2024-01-03,
纸质出版:2023-12-08
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周龙云, 李小军, 闫秋实. 近场水下爆炸荷载作用下桥墩动力响应分析[J]. 兵工学报, 2023,44(S1):90-98.
Longyun ZHOU, Xiaojun LI, Qiushi YAN. Analysis on Dynamic Response of Bridge Pier under Near-field Underwater Explosion Loading[J]. Acta Armamentarii, 2023, 44(S1): 90-98.
周龙云, 李小军, 闫秋实. 近场水下爆炸荷载作用下桥墩动力响应分析[J]. 兵工学报, 2023,44(S1):90-98. DOI: 10.12382/bgxb.2023.0717.
Longyun ZHOU, Xiaojun LI, Qiushi YAN. Analysis on Dynamic Response of Bridge Pier under Near-field Underwater Explosion Loading[J]. Acta Armamentarii, 2023, 44(S1): 90-98. DOI: 10.12382/bgxb.2023.0717.
为研究水下爆炸对桥墩造成的破坏
采用任意拉格朗日-欧拉方法对水下爆炸荷载作用下的桥墩的动力响应和损伤机理进行分析和讨论。通过水下爆炸试验验证有限元模型的正确性
建立水下爆炸荷载作用下的桥墩有限元模型;以桥墩剩余竖向承载力为性能指标
提出桥墩在爆炸荷载作用下的损伤评估方法
讨论了TNT质量、起爆位置等因素对桥墩损伤程度的影响。研究结果表明:近场水下爆炸产生的气泡脉动对桥墩造成的损伤不容忽视
桥墩外侧起爆时
TNT质量与桥墩剩余承载力呈指数关系;TNT当量相同时
桥墩内部爆炸造成的损伤最严重。
The dynamic response and damage mechanism of piers under underwater explosion loading are analyzed to investigate the damage to a pier caused by underwater explosion by using the arbitrary Lagrangian-Euler method. The accuracy of the finite element model is verified through an underwater explosion test
and then a finite element model of a pier under underwater explosion loading is established. Taking the residual vertical bearing capacity of the pier as the performance index
the damage evaluation method of pier under explosion loading is put forward. The influences of explosive weight and initiation point on the damage degree of pier are discussed. The investigation results indicate that the damage to the pier caused by bubble pulsation generated by a near-field underwater explosion cannot be ignored. When the outer side of pier is detonated
the TNT weight is exponentially related to the residual bearing capacity of pier. When the weight of TNT is the same
the damage caused by the explosion inside the pier is the most serious.
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张轶凡 , 刘亮涛 , 王金相 , 等 . 水下爆炸冲击波和气泡载荷对典型圆柱壳结构的毁伤特性 [J ] . 兵工学报 , 2023 , 44 ( 2 ): 345 - 359 . DOI: 10.12382/bgxb.2021.0598 http://doi.org/10.12382/bgxb.2021.0598 为研究近场爆炸冲击波及气泡载荷对缩比后的鱼雷典型圆柱壳结构的毁伤特性,并探讨装药距离、装药方位等相关参数对圆柱壳结构变形特征及毁伤特性的影响规律,采用任意拉格朗日-欧拉算法对近场爆炸冲击波及气泡载荷对圆柱壳结构的毁伤特性进行了数值模拟分析。将壁面附近爆炸气泡演化过程的仿真结果和试验结果进行了对比,验证了数值模拟方法的有效性。利用该数值分析方法对多组不同装药距离和装药方位下的爆炸过程进行了研究,深入分析了冲击波、气泡脉动载荷及射流载荷等不同形式载荷对圆柱壳结构的毁伤作用机理。研究结果表明:冲击波对圆柱壳结构的毁伤效果受装药距离的影响较为明显,装药距离的增大会急剧削弱冲击波在圆柱壳上造成的破坏,而圆柱壳的方位改变对冲击波的毁伤作用影响较小;水射流载荷对圆柱壳结构产生的毁伤受方位因素的影响较为明显,当药包位于圆柱壳下方时圆柱壳迎爆面在气泡脉动及射流载荷联合作用下产生的塑性应变最大。
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ZHUANG T S , WANG M Y , WU J , et al. Experimental investigation on dynamic response and damage models of circular RC columns subjected to underwater explosions [J ] . Defence Technology , 2020 , 16 ( 4 ): 856 - 875 . DOI: 10.1016/j.dt.2019.10.015 http://doi.org/10.1016/j.dt.2019.10.015 Reinforced concrete (RC) columns are widely used as supporting structures for high-piled wharfs. The study of damage model of a RC column due to underwater explosion is a critical issue to assess the wharf's antiknock security. In this study, the dynamic response and damage model of circular RC columns subjected to underwater explosions were investigated by means of scaled-down experiment models. Experiments were carried out in a 10.0 m diameter tank with the water depth of 2.25 m, under different explosive quantities (0.025 kg–1.6 kg), stand-off distances (0.0 m–7.0 m), and detonation depths (0.25 m–2.0 m). The shock wave load and dynamic response of experiment models were measured by configuring sensors of pressure, acceleration, strain, and displacement. Then, the load distribution characteristics, time history of test data, and damage models related to present conditions were obtained and discussed. Three damage models, including bending failure, bending-shear failure and punching failure, were identified. In addition, the experience model of shock wave loads on the surface of a RC column was proposed for engineering application. © 2019 The Authors
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China Academy of Building Research . Design code for concrete structure: GB50010—2010 [S ] . Beijing : China Architecture & Building Press , 2016 . (in Chinese)
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