Faster uplift analysis using inverse of partial tangent stiffness matrix

This study proposes a novel method to accelerate the uplift analysis for NPP buildings. The proposed method does not require an inverse matrix operation of the whole tangent stiffness matrix. Instead, by using the inverse of the partial tangent stiffness matrix, the calculation time can be reduced. First, the outline and details of the method are described. Then, the results of the experiments that were performed to evaluate the proposed method are presented. The results indicate that the proposed method can reduce calculation time to less than half of that half of that required for the tangential stiffness method. (author)