冷弯薄壁型钢—重组竹组合柱偏心受压有限元分析

Finite element analysis of eccentric compression of cold-formed thin-walled steel-reconstituted bamboo composite columns

采用实用有限元分析软件ANSYS,对冷弯薄壁方钢管—重组竹组合柱进行偏心受压性能的有限元分析。通过选取材料本构关系,完成建立模型,设定边界条件,求解得到组合柱极限承载力。用此建模方法通过改变试件的长度、冷弯薄壁型钢的厚度、重组竹板厚度,可以计算实验室无法满足条件下柱的承载力,并对影响承载力的因素进行分析。结果表明:偏心距和长细比对于冷弯薄壁型钢—重组竹偏心受压构件具有重大影响,两种因素相比较而言,长细比的影响略小一些。

Using finite element analysis software ANSYS,the finite element analysis of the eccentric compression performance of cold-formed thinwalled square steel tube-reconstituted bamboo composite column was performed. By selecting the constitutive relation of the material,the model is established,the boundary conditions are set,and the ultimate bearing capacity of the combined column is obtained. By using this modeling method,by changing the length of the specimen,the thickness of the cold-formed thin-walled steel,and the thickness of the recombined bamboo slab,the bearing capacity of the column under the conditions that the laboratory cannot meet can be calculated,and the factors that affect the bearing capacity are analyzed. The results show that the eccentricity and slenderness ratio have a great influence on the cold-formed thin-walled steel-reconstituted bamboo eccentric compressive members. Compared with the two factors,the influence of the slenderness ratio is slightly smaller.