钢-混凝土组合梁的有限元参数分析

钢–混凝土组合梁比传统的组合梁更有优势。基于推出试验,建立三维非线性有限元模型,用于分析钢–混凝土组合梁的力学性能。通过数值分析结果和试验结果的对比,证实了该模型的有效性。特定参数影响分析包括:黏合剂的弹性模量,黏结层的厚度,混凝土强度,黏结强度及黏结面积。数值结果显示:当黏结层的厚度为3～15mm时,大多数分析的参数对钢-混凝土组合梁的影响非常显著。

Parametric Study of Bonded Steel-Concrete Composite Beams by Using Finite Element Analysis

The steel-concrete composite beam bonded by adhesive has particular advantages over the traditional composite beam.Based on the experimental push-out test,this paper proposes a three-dimensional nonlinear finite element model for the mechanical behaviour simulation of bonded steel-concrete composite beams.The proposed numerical model is validated through comparisons between numerical results and experimental data.The effects of certain parameters,including the elastic modulus of adhesive,the adhesive layer’s thickness,the concrete strength,the bonding strength and the bonding area,are investigated.Numerical results show that the influence of most investigated parameters on the response of the bonded composites is very notable,while that of the adhesive layer’s thickness(variation within 3-15mm)is relatively small.