商用飞机撞击全钢衬混凝土板的有限元分析
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摘要
钢板具有强度高、延性好以及耗能性佳等特点,它与混凝土板组成的钢衬混凝土板结构是一种非常好的抗冲击防护结构,被广泛使用在防护工程中,例如核电站的防护壳,能够有效的抵御商用飞机的撞击。当钢衬混凝土板结构遭受商用飞机的撞击时,钢衬板能够有效的限制结构的横向整体变形,而且后置钢衬板还能有效阻止混凝土板的破碎以及碎片的飞溅。为研究钢衬混凝土板结构的抗冲击能力,文中根据钢衬板布置方式的不同建立了3个全钢衬混凝土板的数值模型,并且通过软件模拟了这些模型在波音707-320型商用飞机的撞击下的性能,所采用的方法是荷载时程分析法。研究结果表明:相比混凝土板的正面,板的背面更需要注意加强防护,因此适当的增加后置钢衬板的厚度可以有效地提高钢衬混凝土板结构的防护性能。
The steel plate has the characteristics of high strength, good ductility and good energy dissipation. The steel lined concrete slab structure is a good anti-shock protection structure when the steel plates add to the concrete slab. So it is widely used in protective engineering such as the protective shell of nuclear power station, this structure can resist the impact of commercial aircraft. When the steel-lined concrete slabs are impacted by commercial aircraft, the steel-lined slabs can limit the transverse integral deformation of the structure effectively. And the post-steel-lined slabs can also prevent the concrete slabs from breaking and splashing. For studying the impact resistances of steel-lined concrete slab structure, in this paper, three numerical models of steellined concrete slabs are established according to the different arrangement of steel linings, and the performance of these models under the impact of Boying 707-320 commercial aircraft is simulated by software. the research technique is load time history analysis. The results show that compared with the front side of concrete slabs, more attention should be paid to strengthening the protection on the back side of the slabs. Therefore, proper increase of the thickness of the steel lining slabs can effectively improve the protective performance of the steel-lined concrete slab structures.
The steel plate has the characteristics of high strength, good ductility and good energy dissipation. The steel lined concrete slab structure is a good anti-shock protection structure when the steel plates add to the concrete slab. So it is widely used in protective engineering such as the protective shell of nuclear power station, this structure can resist the impact of commercial aircraft. When the steel-lined concrete slabs are impacted by commercial aircraft, the steel-lined slabs can limit the transverse integral deformation of the structure effectively. And the post-steel-lined slabs can also prevent the concrete slabs from breaking and splashing. For studying the impact resistances of steel-lined concrete slab structure, in this paper, three numerical models of steellined concrete slabs are established according to the different arrangement of steel linings, and the performance of these models under the impact of Boying 707-320 commercial aircraft is simulated by software. the research technique is load time history analysis. The results show that compared with the front side of concrete slabs, more attention should be paid to strengthening the protection on the back side of the slabs. Therefore, proper increase of the thickness of the steel lining slabs can effectively improve the protective performance of the steel-lined concrete slab structures.
引文
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[2]NEI07-13. Methodology for performing aircraft assessments for new plant design[S]. 2011.
[3]Heck?tter C,Sievers J,Tarallo F,et al. Comparative analyses of impact tests with reinforced concrete slab[C]//Towards Convergence of Technical Nuclear Safety Practices in Europe,2010.
[4]Abu-Odeh A. Modeling and simulation of bogie impacts on concrete bridge rails using LS-DYNA[C]//10th International LS_DYNA Users Conference,2008.
[5]Kong S Y,Remennikov A M. Numerical simulation of response of non-composite steel-concrete-steel sandwich panels to impact loading[J]. Australian Journal of Structural Engineering,2012,12(3):211–223.
[6]Jiang H,Chorzepa M G. Aircraft impact analysis of nuclear safety-related concrete structures:A review[J]. Engineering Failure Analysis,2014,46:118–133.
[7]中国国家核安全局. HAD101/04核电厂厂址选择的外部人为事件[S]. 1989.
[8]朱秀云,潘蓉,林皋,等.基于荷载时程分析法的商用飞机撞击钢板混凝土结构安全壳的有限元分析[J].振动与冲击,2015,34(1):1–5.
[9]Xu H,Wen H M. Semi-empirical equations for the dynamic strength enhancement of concrete-like materials[J]. International Journal of Impact Engineering,2013,60:76–81.
[10]Xu H,Wen H M. A computational constitutive model for concrete subjected to dynamic loadings[J]. International Journal of Impact Engineering,2016,91:116–125.
[11]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,2009,36:132–146.
[12]郭晓钧.脆性材料钻孔爆炸致裂机理研究[D].合肥:中国科学技术大学,2013.
[13]LS-DYNA. Keyword user’s manual,revision 971[S]. Livermore Software Technology Corporation,2007.
[14]Li Q M,Reid S R,Wen H M,et al. Local impact effects of hard missiles on concrete targets[J]. International Journal of Impact Engineering,2005,32:224–284.
[15]Jun M,Norihide K,Eiichi T,et al. Investigation on impact resistance of steel plate reinforced concrete barrier against aircraft impact[C]//18th International Conference on Structural Mechanics in Reactor Technology,2005.