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对冷成型钢柱板体系承载力性能进行数值模拟研究。建立三维有限元模型,考虑材料非线性和接触非线性,对柱板体系的极限承载力和破坏模式进行了细致研究,并与试验和AISI(美国钢铁协会)规范计算结果进行了对比,验证了数值模拟的可靠性。在此基础上,针对课题组提出的一种改进柱板体系,即用方钢管代替背靠背C型钢作为边柱,分析其承载力性能,验证了改进体系的优越性,并考察了螺钉间距、覆盖材料厚度等参数对改进体系承载力性能的影响。结果表明:壁厚较薄的构件组成的柱板体系性价比更高;减小螺钉间距可在一定程度上提高柱板体系的极限承载力,但对体系的变形基本无影响;墙板厚度对柱板体系的承载力和变形的帮助都非常有限。
The numerical simulation research on the bearing capacity of cold-formed steel column system. The three-dimensional finite element model was established, considering the material nonlinearity and contact nonlinearity, the ultimate bearing capacity and failure modes of the column system were studied in detail and compared with the experimental and AISI (American Iron and Steel Institute) Reliability of numerical simulation. On this basis, aiming at the improvement of column system proposed by the research group, the square steel tube is used instead of the back-to-back C-shaped steel as the side column to analyze its bearing capacity, which verifies the superiority of the improved system. Material thickness and other parameters to improve the bearing capacity of the system performance. The results show that: the wall thickness is thinner component column system cost performance higher; to reduce the screw spacing can to some extent increase the ultimate bearing capacity of the column system, but the system has little effect on the deformation; wall thickness of the column The capacity of the plate system and the deformation of the help are very limited.