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对原型双跨复合梁的结构行为给出了详细的有限元研究.由于基本上认为剪切连接件是非刚性的,在高等有限元模型中采用弹簧单元可以将它们的非线性荷载-滑移性质考虑在内.对各种原型双跨复合梁进行了参数研究,并提出了主要的研究结果.主要的结构参数包括剪切连接件在正弯矩和负弯矩区域内的变形韧性和变形程度.总共比较和讨论了9个具有不同类型和剪切件数目的复合梁的结构行为,对目前的设计缺陷进行了鉴定.由于提出的有限元模型对详细调查复合梁的结构行为非常有效,有效地利用所提出的模型将对更具有改善结构精度和效率的细化设计准则的发展有帮助.
A detailed finite element study of the structural behavior of a prototype double-span composite beam is given. Since the shear connection is basically considered to be non-rigid, spring elements can be used in the higher-order finite element models to relate their nonlinear load-slip properties Considering the parameters of various prototype double-span composite beams, and the main research results are presented.The main structural parameters include the deformation toughness and degree of deformation of the shear connections in the positive and negative moment regions A total of 9 structural behaviors of composite beams with different types and numbers of shear members were compared and discussed and the current design flaws were identified.Because the proposed finite element model is very effective and effective for detailed investigation of the structural behavior of composite beams Using the proposed model will be helpful for the development of thinning design guidelines that have improved structural accuracy and efficiency.