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基于向量式有限元提出一种新型数值计算方法对钢结构整体提升进行模拟分析.首先,以南京移动通信综合楼和附楼之间的钢连廊为例,对其进行静力分析,并与传统有限元求解结果比较,验证向量式有限元方法的有效性.针对钢结构整体提升动态施工的特点,引入张拉索单元,该向量式有限元方法避免了刚度矩阵的迭代求解以及奇异等问题,实现了钢结构的整体提升施工全过程跟踪模拟分析.通过使用向量式有限元方法得到了不同提升速度下钢结构节点的位移和单元内力时程曲线.结果表明,提升速度对提升力、结构内力和位移有一定影响,在正常提升速度情况下,动力放大系数取为1.5是安全合理的.
Based on vector finite element method, a new numerical method is proposed to simulate the overall lifting of steel structure.Firstly, taking the steel corridor between the Nanjing mobile communication building and the annex building as an example, In order to verify the validity of the vector finite element method, the tension element is introduced to enhance the dynamic performance of the steel structure as a whole. The vector finite element method avoids the iterative solution of the stiffness matrix and singularities , The tracking simulation analysis of the whole process of steel structure construction was realized.The displacement and unit internal force time history curve of steel structure under different lifting speeds were obtained by using vector finite element method.The results showed that the effect of lifting speed on lifting force, Internal force and displacement have a certain impact, under normal lifting speed, the power amplification factor of 1.5 is safe and reasonable.