EVALUASI KEKAKUAN LATERAL TINGKAT MENGGUNAKAN METODE DEFORMASI – GAYA LATERAL

Abstract

The current development of software for structural analysis has greatly facilitated in performing static analysis to calculate lateral displacement and dynamic properties (frequency and mode shape) in dynamic analysis. However, the level lateral stiffness value is still estimated using the column stiffness value of 12EI/H³. This study aims to evaluate the value of column stiffness to the lateral stiffness of storeys in a frame building structure using the deformation - lateral force method, and analyze the effect of variations in the number of spans and the number of storeys on the value of lateral stiffness. The results show that the deformation - lateral force method yields lower stiffness than Σ12EI/H³ and provides a more realistic representation of stiffness than the traditional method using column stiffness. This indicates that the standard value of column stiffness of 12EI/H³ cannot be directly used in estimating lateral stiffness of storeys. This finding indicates that as the building height increases, the column stiffness coefficient decreases, while an increase in the number of spans leads to an increase in the column stiffness coefficient. In addition, there are different stiffness distribution patterns between the top level, intermediate level and base level, where the stiffness of the top level tends to be larger than that of the intermediate level but smaller than that of the base level. These findings provide important insights for the planning and design of earthquake-resistant buildings, with an emphasis on the importance of selecting an appropriate method for estimating lateral stiffness of levels.