摘要
为了求解爆炸作用下钢柱的动力响应,研究钢柱的抗爆性能,以钢柱变形后单元的弧线长度和截面转角为未知量,得到钢柱在爆炸作用下受力性能的差分计算方法,此方法可考虑钢柱大挠度和轴向变形对其截面曲率的影响;通过算例与有限元的计算结果进行对比,验证差分计算方法的可靠性,同时给出该方法的应用条件。结果表明,考虑钢柱大挠度和轴向变形的差分计算方法可有效用于钢框架单柱的抗爆计算,计算精度满足工程需要。
To study the characteristic of steel column under blast loading, taking arc length and section angle as variables, the differential calculation method was proposed, which was capable of considering the effect of large deflection and axial deformation on the sectional curvature. The reliability of the differential calculation method was verified through the comparison of calculation and finite element results, and the application conditions of this method were given. The results show that the differential calculation method taking large deflection and axial deformation into account can be used for blast resistance calculationof column effectively, and the computational precision meets engineering needs.
作者
杨涛春
李国强
陈素文
YANG Taochun;LI Guoqiang;CHEN Suwen(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,Shandong,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《济南大学学报（自然科学版）》
CAS
北大核心
2020年第3期247-253,共7页
Journal of University of Jinan(Science and Technology)
基金
国家自然科学基金项目(51608229)
山东省高等学校科研发展计划项目(J18KA206)。
关键词
钢框架
钢柱
差分计算
爆炸荷载
steel frame
steel column
differential calculation
blast loading
