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大悬挑变截面梁折线形斜柱钢刚架,结构型式不规则、受力复杂。为考察其受力性能,评价其安全性,对该结构进行了设计验证和极限承载力的缩尺模型试验研究和有限元分析。试验研究表明:变截面梁折线形斜柱钢刚架在设计荷载作用下均处于弹性状态,在极限承载力试验中,变截面梁与折线形斜柱连接部位最先屈服,2.56倍设计荷载时结构达到极限状态。结合试验结果与有限元计算结果,分析了结构的受力变形特征和内力分布规律,分析表明,有限元计算结果与试验结果吻合良好,试验结果验证了理论分析与原型结构设计的正确性;研究表明,折线形斜柱大悬挑钢刚架结构在保证顶部水平约束的情况下,具有较高的承载能力和足够的安全性。
Large cantilevered variable cross-section beam oblique linear steel column frame, the structure of irregular, complex force. In order to investigate the mechanical properties of the structure, the safety of the structure was evaluated. The design of the structure was verified and the ultimate bearing capacity of the scale model experimental research and finite element analysis. The experimental results show that the inclined-column steel frame with variable cross-section is in elastic state under the design load. In the ultimate bearing capacity test, the connection between the variable-section beam and the broken-line inclined column is the first to yield, 2.56 times the designed load Structure reached the limit state. Combined with the test results and the finite element calculation results, the force and deformation characteristics and internal force distribution of the structure are analyzed. The results show that the calculated results are in good agreement with the experimental results. The experimental results verify the correctness of the theoretical analysis and prototype structure design. The results show that the large suspended cantilevered steel frame structure with a sloping column has a high carrying capacity and sufficient safety under the condition that the top horizontal constraint is ensured.