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目的研究L形钢管混凝土芯柱的承载力变化规律以及影响因素,为钢管混凝土在工程中的应用提供参考依据.方法根据L形钢管混凝土芯柱的工作机理和有限元计算原理,编写MATLAB程序求其承载力,通过改变加载角、偏心距、钢管直径以及钢管厚度等参数研究其对L形钢管混凝土受力性能的影响,并与有限元模拟值进行对比.结果偏心距一定时,加载角在0～45°内变化,L形钢管混凝土芯柱的承载力随加载角的增大而逐渐减小;当钢管厚度不变直径增加,或者钢管直径不变厚度增加时,试件承载力随含钢率的增加而逐渐增大.结论数值模拟结果与有限元模拟结果吻合良好,验证了程序的可行性.可以利用本套程序对L形钢管混凝土芯柱进行进一步的研究,得出不同参数变化下试件承载力的变化规律.
Aim To study the variation law of bearing capacity of L-shaped concrete-filled steel tubular column and its influencing factors, and to provide reference for the application of CFST in engineering.Methods According to the working principle and finite element calculation principle of L-shaped concrete-filled steel tubular column, The bearing capacity of the L-shaped concrete-filled steel tube concrete is studied by changing the loading angle, eccentricity, the diameter of the steel pipe and the thickness of the steel pipe, and compared with the finite element simulation results.Results When the eccentricity is fixed, 0 ~ 45 °, the bearing capacity of L-shaped concrete-filled steel tubular column decreases with the increase of loading angle. When the diameter of steel pipe is constant or the thickness of steel pipe is unchanged, Steel rate increases gradually.Conclusion The numerical simulation results are in good agreement with the results of finite element simulation to verify the feasibility of the program.We can use this program to further study the L-shaped concrete-filled steel tubular column and obtain the different parameters Under the load-bearing capacity of the specimen changes.