Seismic Response of Slab Column Connection with Pyramid Shaped Drop Panel

Both experimental and finite element analysis (FEA) was used to study the seismic response of reinforced concrete (RC) interior slab-column connection made with pyramid-shaped drop panel subjected vertical horizontal loads. The dimensions models at “¼ ” linear scale for laboratory testing FE Analysis are derived from rules column drops, given a prototype “9.60m” grid slab thickness “320mm”. Lab specimens were tested drops (flat slab, rectangular pyramid-shaped) facing up, loadings (vertical down in direction) applied by jacks towards top central projecting “150mm” square column. One flat (“80mm” thick no drop), failure under load (80kN), provided values setting variables FEA. remaining 5 lab (1 1 each 40mm 30mm thicknesses), fixed (40kN), increasing moment junction “500mm” above slab. FEA results same conditions compared closely results. models, equal faces (drops “40mm” “30mm”), exhibit similar maximum force resistances models. However, these achieved pyramid higher deflections – being measured downwards centerline one half away face. A parametric conducted FEA, constant load, steps (10kN; 25kN 55kN), calculating load. Calculations on following definitions: Energy absorption is represented area deflection vs curves; Ductility ratio yield, Stiffness Overstrength factors slopes diagrams elastic plastic zones respectively. type significantly improved performance without drops. exhibited energy absorption, ductility, stiffness overstrength face thickness.