中文摘要：

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.

英文摘要：

A newnumerical method based on vector form intrinsic finite element（VFIFE） is proposed to simulate the integral lifting process of steel structures. First, in order to verify the validity of the VFIFE method, taking the steel gallery between the integrated building and the attached building of Nanjing M obile Communication Buildings for example, the static analysis was carried out and the corresponding results were compared with the results achieved by the traditional finite element method. Then, according to the characteristics of dynamic construction of steel structure integral lifting, the tension cable element was employed to simulate the behavior of dynamic construction. The VFIFE method avoids the iterative solution of the stiffness matrix and the singularity problems. Therefore, it is simple to simulate the complete process of steel structure lifting construction.Finally, by using the VFIFE, the displacement and internal force time history curves of the steel structures under different lifting speeds are obtained. The results show that the lifting speed has influence on the lifting force, the internal force, and the displacement of the structure. In the case of normal lifting speed, the dynamic magnification factor of 1. 5 is safe and reasonable for practical application.