具有可变形剪切连接件的连续复合梁的结构行为

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一滑移性质考虑在内．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．

Structural Behaviour of Continuous Composite Beams with Deformable Shear Connectors

This paper presents a detailed finite element study on the structural behaviour of double span composite beams of practical configurations. As it is essential to acknowledge that shear connectors are not rigid, their non-linear load-slippage characteristics are incorporated into advanced finite element models through the use of spring elements. A parametric study on various double span composite beams of practical configurations is carried out, and key findings of the study are presented in this paper. The key structural parameters include the deformation ductility of shear connectors as well as the degrees of shear connection provided at both the sagging and the hogging moment regions. The structural behaviour of a total of 9 composite beams with different types and numbers of shear connectors is compared and discussed while current design deficiency is identified for possible development. As the proposed finite element models are reckoned to be highly effective for detailed investigation into the structural behaviour of composite beams, the effective use of the models will be instrumental to the design development of more refined design rules for improved structural accuracy and efficiency.