杨涛春，李国强，陈素文
    (同济大学，上海200092)

[摘要] 采用有限元模型并利用LS-DYNA软件对三种不同接触爆炸荷载位置情况下钢-混凝土组合梁的动力响应进行了研究，并对梁的变形过程、钢梁最大竖向位移及各主要截面内力进行了详细分析对比，结果表明，局部接触爆炸作用下钢-混凝土组合梁以荷载区局部变形为主，爆炸荷载中心处钢梁竖向位移最大，爆炸荷载位置对荷载作用区内钢-混凝土组合梁的内力影响较小。
[关键词] 钢-混凝土组合梁；接触爆炸荷载；荷载位置；动力响应

Research on the dynamic response of steel-concrete composite beam under different contact blast loading position
Yang Taochun,  Li Guoqiang,  Chen Suwen
 (Tongji University, Shanghai 200092, China)

Abstract: To understand the behavior of steel-concrete composite beam under different contact blast loading position, proper finite element modes are constructed and investigated under three kinds of blast loading position. The process of deformation and displacement of the beam, internal force on the main sections are described in detail. It is demonstrated that local deformation is a main deformation form in the loading area. The largest vertical deformation of the steel beam is in the center of the loading area. Loading position has little effect on internal force of the beam in the loading region.
Keywords: steel-concrete composite beam;  contact blastloading;  loading position;  dynamic responses