水中近场爆炸作用下钢筋混凝土桩毁伤效应研究
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摘要
为了对高桩码头的抗爆性能及安全性进行评估,利用数值分析方法,对某高桩码头钢筋混凝土桩在近场水中爆炸荷载作用下的破坏模式进行研究.通过与经验公式的对比,对数值分析方法进行了验证;建立了钢筋混凝土桩在爆炸荷载作用下的三维分析模型,研究了半径数及爆源深度等参数对钢筋混凝土桩的动力响应和破坏模式影响;基于数值分析结果,给出了该型钢筋混凝土桩在给定爆炸深度情况下抗爆的安全范围,研究成果可以为该类型高桩码头抗爆设计及分析提供参考.
Reinforced concrete pile is the main load-bearing components of high pile wharf,the high pile wharf by near field water explosion load,the need for power reinforced concrete pile under explosion load response and failure mode were studied,and then the antiknock performance and safety of high pile wharf were evaluated. In this paper,the failure modes of a reinforced concrete pile near a high pile wharf under water explosion were studied by means of numerical analysis. By comparing with the empirical formula of the analysis,the numerical analysis method was validated. 3D analysis model of reinforced concrete pile under explosion load was established,and the effects of the number and radius of explosion source depth and other parameters on the reinforced concrete pile dynamic response and failure mode were researched.Based on the results of numerical analysis,the safety range of steel antiknock concrete pile was obtained,and the research results can provide reference for the design and analysis of high pile wharf explosion.
Reinforced concrete pile is the main load-bearing components of high pile wharf,the high pile wharf by near field water explosion load,the need for power reinforced concrete pile under explosion load response and failure mode were studied,and then the antiknock performance and safety of high pile wharf were evaluated. In this paper,the failure modes of a reinforced concrete pile near a high pile wharf under water explosion were studied by means of numerical analysis. By comparing with the empirical formula of the analysis,the numerical analysis method was validated. 3D analysis model of reinforced concrete pile under explosion load was established,and the effects of the number and radius of explosion source depth and other parameters on the reinforced concrete pile dynamic response and failure mode were researched.Based on the results of numerical analysis,the safety range of steel antiknock concrete pile was obtained,and the research results can provide reference for the design and analysis of high pile wharf explosion.
引文
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[9]徐强,曹阳,陈健云,等.混凝土重力坝接触爆炸的响应及破坏特性分析[J].湖南大学学报,2016,43(7):62-74.XU Q,CAO Y,CHEN J Y,et al. Study on the response and damage characteristic of concrete gravity dam subjected to contact explosion[J]. Journal of Hunan University,2016,43(7):62-74.(in Chinese)
[10] LU L,LI X,ZHOU J,et al. Numerical simulation of shock response and dynamic fracture of a concrete dam subjected to impact load[J]. Earth Sciences Research Journal,2016,20(1):1-5.
[11]于建华.水下爆炸荷载作用下桥墩的作用效应和防护研究[D].武汉:武汉理工大学,2014.YU J H. Research on action effect and protection for pier subjected to underwater explosion loads[D]. Wuhan:Wuhan University of Technology. 2014.(in Chinese)
[12]孔祥清,赵倩,曲艳东,等.空中和水下爆炸时钢筋混凝土板动态响应对比分析[J].科技导报,2016,34(18):279-286.KONG X Q, ZHAO Q, QU Y D, et al. Dynamic responses of a concrete slab subjected to air and underwater explosions[J]. Science&Technology Review,2016,34(18):279-286.(in Chinese)
[13]刘科种,徐更光,辛春亮,等. AUTODYN水下爆炸数值模拟研究[J].爆破,2009,26(3):18-21.LIU K Z,XU G G,XIN C L,et al. Research on numerical simulation in underwater explosion by AUTODYN[J]. Blasting,2009,26(3):18-21.(in Chinese)
[14] TU Z G,LU Y. Evaluation of typical concrete material models used in hydrocodes for high dynamic response simulations[J]. International Journal of Impact Engineering,2009,36(1):132-146.
[15] HU G, WU J, LI L. Advanced concrete model in hydrocode to simulate concrete structures under blast loading[J/OL]. Advances in Civil Engineering,2016[2017-11-03]. http:/dx. doi. org/10. 1155/2016/7540151.
[2]崔杰.近场水下爆炸气泡载荷及对结构毁伤试验研究[D].哈尔滨:哈尔滨工程大学,2013.CUI J. Experimental study on underwater explosion bubble loads and damage on the structure nearby[D]. Harbin:Harbin Engineering University,2013.(in Chinese)
[3]师燕超.爆炸荷载作用下钢筋混凝土结构的动态响应行为与损伤破坏机理[D].天津:天津大学,2009.SHI Y C. Dynamic response and damage mechanism of reinforced concrete structures under blast loading[D].Tianjin:Tianjin University,2009.(in Chinese)
[4]闫秋实,杜修力.典型地铁车站柱在爆炸荷载作用下损伤评估方法研究[J].振动与冲击,2017,36(1):1-7.YAN Q S,DU X L. Damage evaluation for a column of a typical subway station subjectedto internal blast loading[J]. Journal of vibration engineering,2017,36(1):1-7.(in Chinese)
[5] CONRAD K, ABASS B. Effects of transverse reinforcement spacing on the response of reinforced concrete columns subjected to blast loading[J].Engineering Structures,2017,142:148-164.
[6]朱升波.近爆作用下钢筋混凝土结构的抗爆性能研究[D].杭州:浙江大学,2010.ZHU S B. Investigation on anti-explosion performance of reinforced concrete structure under the close-in explosion[D]. Hangzhou:Zhejiang University, 2010.(in Chinese)
[7]郑健.钢筋混凝土框架结构在爆炸荷载作用下的损伤研究[D].长沙:湖南大学,2012.ZHENG J. Damage analysis of reinforced concrete frame structure under blast loading[D]. Changsha:Hunan University,2012.(in Chinese)
[8]张社荣,王高辉.浅水爆炸冲击荷载下高拱坝抗爆性能分析[J].天津大学学报,2013,46(4):315-321.ZHANG S R,WANG G H. Antiknock performance of high arch dam subjected to shallow water explosion[J].Journal of Tianjin University,2013,46(4):315-321.(in Chinese)
[9]徐强,曹阳,陈健云,等.混凝土重力坝接触爆炸的响应及破坏特性分析[J].湖南大学学报,2016,43(7):62-74.XU Q,CAO Y,CHEN J Y,et al. Study on the response and damage characteristic of concrete gravity dam subjected to contact explosion[J]. Journal of Hunan University,2016,43(7):62-74.(in Chinese)
[10] LU L,LI X,ZHOU J,et al. Numerical simulation of shock response and dynamic fracture of a concrete dam subjected to impact load[J]. Earth Sciences Research Journal,2016,20(1):1-5.
[11]于建华.水下爆炸荷载作用下桥墩的作用效应和防护研究[D].武汉:武汉理工大学,2014.YU J H. Research on action effect and protection for pier subjected to underwater explosion loads[D]. Wuhan:Wuhan University of Technology. 2014.(in Chinese)
[12]孔祥清,赵倩,曲艳东,等.空中和水下爆炸时钢筋混凝土板动态响应对比分析[J].科技导报,2016,34(18):279-286.KONG X Q, ZHAO Q, QU Y D, et al. Dynamic responses of a concrete slab subjected to air and underwater explosions[J]. Science&Technology Review,2016,34(18):279-286.(in Chinese)
[13]刘科种,徐更光,辛春亮,等. AUTODYN水下爆炸数值模拟研究[J].爆破,2009,26(3):18-21.LIU K Z,XU G G,XIN C L,et al. Research on numerical simulation in underwater explosion by AUTODYN[J]. Blasting,2009,26(3):18-21.(in Chinese)
[14] TU Z G,LU Y. Evaluation of typical concrete material models used in hydrocodes for high dynamic response simulations[J]. International Journal of Impact Engineering,2009,36(1):132-146.
[15] HU G, WU J, LI L. Advanced concrete model in hydrocode to simulate concrete structures under blast loading[J/OL]. Advances in Civil Engineering,2016[2017-11-03]. http:/dx. doi. org/10. 1155/2016/7540151.