Analyses of bending moment effect on the floors of modeled high rise buildings

Abstract

Computer modeling aims at transforming the design process of buildings worldwide from the use of 2D to 3D, 4D and 5D design and coordination technologies. To investigate realistic values of bending moment and normal forces, a full three-dimension (3D) analysis is needed in order to obtain correct values, therefore the state of stress within a floor is more complex, in addition to the normal stresses due to bending which is huge and in most cases must be considered if failure is to be avoided. The purpose of this research is to study and compare the effect of bending moment on floors of modeled high rise buildings on elastic ground and firm ground. The research design was exploratory which made use of Complex Program Lira to design and calculate 18-storey residential buildings. The results indicate that for both models the maximum bending stress occurred at the first floors whiles the minimum bending stress occurred at the top floors. The bending stresses from second floor to the top floor are the same for each model. The model with elastic base foundation has high bending stress as compared to the model with firm base foundation by 30% for first floors and 28% for the subsequent floors. It could therefore be concluded that bending moment effect on the floors was greater in the model with elastic base than the model with firm base. � Research India Publications.