The Irregular Response of Flat Plate Structures to Horizontal Deformation for Engineering Decisions

This study examines the structural response of a seven-story reinforced concrete building with a dual system, focusing on shear forces, stiffness, and inter-story variations. Designed in accordance with SNI 1726-2019 for Jakarta, the study considers dead loads, live loads, wind loads, rain loads, and earthquake loads. Analysis on the second floor (6.2 m above the foundation) indicates that the inter-story deflections meet the permissible limits, with a maximum deviation of 64.615 kN at the roof and 49.23 kN from floors 2 to 6. Static shear forces reached 41,826.62 kN (X) and 4,182.62 kN (Y), while dynamic shear forces reached 4,697.28 kN (X) and 5,057.97 kN (Y), meeting the static force requirement of 100%. Overall, the shear forces, stiffness, and inter-story deviations of Building B demonstrate an effective structural response to earthquake activity. Engineers are expected to master the behavior of irregularities in structural elements due to earthquake loads so that they can make informed decisions in construction planning and its implementation in the field.