基于有限元模拟的钢-竹组合梁柱节点胶层力学性能研究

利用ABAQUS有限元软件建立了钢-竹组合梁柱节点的三维模型,并采用双线性内聚力模型建立了胶层单元,与试验进行了对比,分析了组合节点胶层界面的应力变化和刚度退化.结果表明:建立的有限元模型能很好地模拟钢-竹组合梁柱节点的加载过程,验证了双线性内聚力模型模拟胶层的有效性,加载过程中胶层应力呈现出两端大、中间小的特点,胶层...

Mechanical properties of steel-bamboo composite beam-column joint adhesive layer based on finite element simulation

This paper uses ABAQUS finite element software to establish a three-dimensional model of the steel-bamboo composite beam-column joint, and uses a bilinear cohesive force model to establish a glue layer element. The comparison with the experiment is carried out, and the stress change and stiffness degeneration of the glue layer interface of the combined joint are analyzed. The results show that the established finite element model can simulate the loading process of the steel-bamboo composite beam-column joints, and verify the effectiveness of the bilinear cohesive force model in simulating the adhesive layer. During the loading process, the adhesive layer stress appears large at both ends. The characteristic of the middle is small. The adhesive layer starts to fail at both ends and gradually extends to the middle. The failure of the adhesive layer is very small and occurs only locally, which is in good agreement with the experimental results. Before the adhesive layer fails completely, the load-displacement curve of the adhesive layer model is basically the same as the overall modeled load-displacement curve, and the difference in ultimate bearing capacity between the two is only 0.63%. Therefore, the model is simplified. Before the glue layer fails, the steel and the bamboo plywood can be bound together and regarded as a whole one body. The analysis on the steel-bamboo composite component by overall modeling can provide a reference for future simulation of the steel-bamboo composite structure.