混凝土中柱形装药的爆炸破坏分区 及应力波衰减规律

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中图分类号：0382 国标学科代码：13035 文献标志码：A

Study on failure zones and attenuation law of stress waves in concrete induced by cylindrical charge explosion

ZHOU Xin，FENG Bin，CHENLi （Engineering Research Center ofSafety and Protection of Explosion & Impact of Ministry of Education， Southeast University，Nanjing211189，Jiangsu，China）

Abstract：Inblast-resistantstructraldesignforconventional weapos，previoussudiesonblas-iducedstresswaves nsolid media have predominantly focusedonsoilandrockmedia（i.e.，groundshock isues），whereas researchonthe propagationand atenuation lawsof stresswaves inconcrete remains relativelylimited.Based onthe Karagozian and Case concrete（KCC） constitutive model in conjunction with the multi-material ALE（MMALE）algorithm， the propagation laws of stress waves in concrete induced bycylindrical chargeexplosion were numericallyinvestigated.Firstly，the applicabilityofthecostitutive modelparameters andnumerical algorithm were validatedbycomparing theresults with theexisting experiments. Subsequently，thepeak stresswas employed asacriterion todelineate theexplosive damage zones in theconcrete surrounding thecharge.Aditionally，theatenuationlawsofexplosionstress waves ineachdamagezone were disussed.Finallyteefect ofburialdepthwastakenintofurtherconsidered，andaformulaforcalculatingthepeak stressinconcreteinduced by cylindrical chargeexplosion was established.It was foundthattheattenuation patesof blast-induced stresswaves differ significantlyineach explosion failure zone.Thestress wavesin the near-field zone（quasi-fluid and crushing zones） demonstrates amorerapid atenuationrate compared tothat inthe mid-field zone （transition and fracture zones）.Furthermore， an increase intheaspectratioof thecylindricalchargeleads toanaccelerationintheatenuationof thenormal peak stre. Moreover，theestablished formula forcalculating the peak stressof blast-induced stresswaves enablesaccurateandrapid determinationofthe normal peak stressgenerated bycylindricalcharges withvaryinggeometries andburialdepths，whichcan be served as a valuable reference for blast-resistant design of concrete structures.

Keywords： concrete; cylindrical charges; failure zones; explosion stress waves; peak stress

钢筋混凝土结构是抗爆结构中最主要的结构类型，混凝土材料广泛应用于各类民用建筑、防护工事及遮弹层等防护屏障。（剩余23108字）