以外层为不锈钢的中空夹层钢管混凝土柱为研究对象,采用有限元分析软件,模拟该类构件在低速横向冲击下的动力响应,讨论空心率对其耐撞性能的影响,并提出稳固性因数来评估结构的耐撞性能,同时展开3组实验对有限元模拟典型算例进行校正.试件的耐撞性能主要从抗冲击能力与冲击过程中结构的稳固性方面讨论.研究结果表明:空心率在0～0.73范围内,其对冲击力平台值影响不明显,试件抗冲击能力没有明显变化;空心率大于0.73,冲击力平台值明显下降,试件抗冲击能力明显减弱.空心率在0～0.6范围内,试件冲击过程中的结构稳固性因数保持在一个较高水平;空心率0.6～1.0范围内,试件冲击过程的结构稳固性因数明显降低,且呈单调下降趋势.%In this paper we simulated the dynamic response of stainless steel-concrete-steel double-skin tubular columns under low speed lateral impact loading using a software of finite element analysis,examined the effect of the hollow rate on the impacting characteristics,and proposed to evaluate the crashworthiness of a structure by using the robust coefficient,by conducting three sets of tests to adjust the typical cases of finite element simulation.The specimen's crashworthiness was analyzed mainly on the basis of its robustness structural stability in the impacting process.The results show that at a hollow rate of 0-0.6,the hollow rate's influence on the value of the impact platform was not obvious and little change in the specimen's crashworthiness was observed;at a hollow rate above 0.73,the value showed an obvious decrease and the crashworthiness was greatly reduced;at a hollow rate of 0-0.6,the specimen's structural robust coefficient was kept relatively high;and at a hollow rate of 0.6-1.0,the specimen's structural robust coefficient was obviously reduced,exhibiting an tendency of decrease in the impacting process.
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