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提出了针对纯钢结构加固的部分研究结论。在简支梁柱连接加固过程中,可通过悬链作用预防其逐步破坏。在对悬链作用的评估中,由于巨大的拉力作用对结构性能的影响,使得分析变得较为复杂。借助于计算机和强大的计算软件,有限元分析方法提供了理想模型可以解决如此复杂的问题。利用ABAQUS有限元程序,针对悬链作用的分析开发了一维、二维和三维模型,并对原始和加固后的结构进行了后期遭受爆炸攻击的模拟。一维梁单元模型在计算整体性能时与二维固体单元或者三维壳单元模型的分析结果比较接近,特别是对那些节点已加固的结构而言。为验证有限元预测模型的有效性,对研究与相关文献中的结论进行了比较。通过对比加固前和加固后的计算结果,证明了所提议方案的优点。
Some conclusions about the reinforcement of pure steel structure are put forward. In the process of strengthening and connecting simply supported beam columns, the gradual destruction can be prevented by catenary effect. In the assessment of catenary effects, the analysis becomes more complicated due to the effect of huge tensile forces on the structural performance. With the help of computers and powerful computational software, finite element analysis provides the ideal model to solve such complex problems. Using the ABAQUS finite element program, one-dimensional, two-dimensional and three-dimensional models were developed for the analysis of catenary effects. The original and reinforced structures were simulated with explosive attack in the late stage. The one-dimensional beam element model is similar to the two-dimensional solid element or three-dimensional shell element model when calculating the overall performance, especially for those structures where the nodes have been reinforced. To verify the effectiveness of the finite element prediction model, the conclusions of the research and related literature were compared. By comparing the results of pre-reinforcement and post-reinforcement calculations, the advantages of the proposed solution are demonstrated.