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采用ABAQUS有限元分析软件对9根H型钢-木组合梁试件的受弯性能进行非线性数值分析,并对组合梁数值模拟中木材和H型钢材料模型定义、有限元建模、弹簧单元生成及后处理等关键技术进行系统研究。采用ABAQUS中的弹簧单元Spring2组成三维连接单元模拟木材与H型钢的相互作用,并提出了生成弹簧单元的实用方法。分析结果表明,钢-木组合梁的ABAQUS数值模拟结果与试验结果吻合良好,从而表明所建立的ABAQUS数值模拟技术合理、可行。同时对钢-木组合梁抗弯性能进行参数分析,考虑钢材屈服强度、H型钢腹板厚度及高度、H型钢翼缘厚度、木材厚度和组合梁宽度对抗弯刚度和抗弯承载力的影响。分析结果表明,H型钢腹板高度影响最为显著,而腹板厚度的影响作用最小。
The ABAQUS finite element analysis software was used to conduct nonlinear numerical analysis of the bending behavior of nine H-section steel-wood composite beam specimens. The numerical simulation of composite beam and wood H-beam model, finite element modeling, spring element generation And post-processing and other key technologies for system research. The spring element Spring2 in ABAQUS is used to simulate the interaction between wood and H-beam through a three-dimensional connection element, and a practical method for generating spring elements is proposed. The analysis results show that the ABAQUS numerical simulation results of steel-wood composite beams are in good agreement with the experimental results, which shows that the numerical simulation technique of ABAQUS established is reasonable and feasible. At the same time, the parameters of steel-wood composite beams were analyzed. The influence of steel yield strength, H-section web thickness and height, H-section flange thickness, timber thickness and composite beam width on flexural rigidity and flexural capacity were analyzed. The analysis results show that the height of H-beam web is the most significant, while the effect of web thickness is the least.