Web girders of ship hull structures are often damaged due to in-plane impact load during ships collision and grounding accidents.Here,the specimens were scaled down and simplified from a typical web girder structure in ships.A set of unstiffened web girders and a set of longitudinally stiffened ones were designed.The quasi-static impact tests and finite element simulations for the two sets of web girders subjected to in-plane impact loads were conducted.Their deformation mechanisms were analyzed from two sides of impact loads and damage deformation.The results showed that the longitudinally stiffened web girders can improve greatly their structural resistance forces;two types of web girders have different wrinkle deformation modes in middle section of ribbed plates;the results can provide a basis for the determination of web girders' deformation modes in subsequent analytical methods.%在遭遇碰撞搁浅事故时,船体强桁材结构常常会受到面内载荷的作用发生变形.对船体典型强桁材结构进行缩尺简化,设计了一组不加筋(US-WG)和一组垂直加筋(LS-WG)强桁材试件,通过开展准静态冲压试验及相应的数值仿真,从冲压载荷、损伤变形方面分析研究两种形式强桁材在面内载荷作用下的变形机理.结果表明:垂直加强筋能大幅提高强桁材在面内载荷作用下的结构抗力;两种形式强桁材在肋板中间截面具有不同的褶皱变形模式,可为后续解析方法中变形模式的确定提供依据.
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