Numerical investigation of the effect of beam slab openings in RC structures on seismic behavior

Earthquake negatively affects the behavior of reinforced concrete frame systems that have slab discontinuities. As a result of differences in diaphragm behavior according to slab void ratio and position, lateral loads cannot be distributed to vertical bearing elements in proportion to their rigidity. In this study, the topic of differences in the behavior of reinforced concrete frame system under lateral load if void ratio and position of the slab change have been examined numerically. For this purpose, five single-story three-dimensional carrier frame models with different void ratios and positions were created in the ANSYS program analyzing according to the finite element method. As a result of the study, an increase in slab void ratio of reinforced concrete frame type carrier systems resulted in displacement in more significant amounts. Along with 25% being a safe void ratio in terms of rigid diaphragm behavior when the void ratio is 50%, whether the void is symmetrical or not becomes extremely important in terms of behavior.