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论文类型： 期刊论文

发表时间： 2021-07-21

发表刊物： Tumu Gongcheng Xuebao/China Civil Engineering Journal

卷号： 43

期号： SUPPL. 1

页面范围： 484-489

ISSN号： 1000131X

摘要： Numerical analysis is performed to study the dynamic responses and the failure mode of the light steel structural column caused by fire and blast loading. The influences of the different temperatures, the different peak of blast impact load, and the same of the peak of blast loading with different peak time are considered in the paper. The dynamic finite element software ANSYS/LS-DYNA is used for the numerical simulation and establishment for the solid model of the light steel column. According to the European standard 3 under the fire with the rise of temperatures, steel elastic modulus, shear modulus, yield strength are reduced. Some specific temperatures are selected to numerically analyze for the steel column under blast loading, considering strain rate effect during the simulation. The numerical results indicate: the deformation of the mid-span of the steel column under the same blast loading is increased and the damage is obvious as the temperature is rising. The deformation of the mid-span of the steel column under the same blast loading is also increased as the peak blast occurs early. The deformation of the steel column is more obvious at the elevated temperature than at the normal temperature, the failure modes of the steel column under the blast loading at elevated temperature are obviously different to that at low temperature.