CAJ | 학술논문

通过 LS - DYNA 软件对两种截面的钢管混凝土柱在爆炸荷载下爆炸冲击波的传播过程进行了三维数值模拟。混凝土采用 HJC 模型，钢管采用了考虑应变率的随动硬化塑形模型，炸药采用 TNT 炸药，使用 LS - DYNA 程序中的高能炸药爆轰产物压力-体积关系的 JWL 状态方程分析了爆炸冲击波的传播过程，得到了在不同比例距离下爆炸冲击波在通过两种截面柱子时超压峰值的衰减及增大规律。
통과 LS - DYNA 연건대량충절면적강관혼응토주재폭작하재하폭작충격파적전파과정진행료삼유수치모의。혼응토채용 HJC 모형，강관채용료고필응변솔적수동경화소형모형，작약채용 TNT 작약，사용 LS - DYNA 정서중적고능작약폭굉산물압력-체적관계적 JWL 상태방정분석료폭작충격파적전파과정，득도료재불동비례거리하폭작충격파재통과량충절면주자시초압봉치적쇠감급증대규률。
The LS - DYNA software was employed to make a three - dimensional simulation of the two types of cross - sectional concrete filled steel tubular(CFST)columns under blast load. The JHC model was used for concrete material and the MAT PLASTIC KINEMATIC model considering the strain rate was used for steel. The explosive is TNT,JWL state equation was used describing the high explosive detonation products pressure - volume relation in the LS - DYNA. The explosive shock wave propaga-tion process was analyzed to obtain the decreasing and increasing law of the blast shock wave overpres-sure peak in different distance when the wave passed through the two cross - sectional columns.