Effect of hollow ratio on crashworthiness of stainless steel-concrete-steel double-skin tubular columns

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.