Kazaz, Ilker2026-03-262026-03-2620249783031576614978303157659197830315765842366-25572366-256510.1007/978-3-031-57659-1_42-s2.0-85204358798https://doi.org/10.1007/978-3-031-57659-1_4https://hdl.handle.net/20.500.14901/3625Kazaz, İlker/0000-0002-3885-1885After the Kahramanmaras-centered M(w)7.8 and M(w)7.6 earthquakes that hit 11 provinces of Turkiye severely on February 6, 2023, it was observed that there are serious problems in the seismic performance of residential buildings and especially the ones with reinforced concrete structural walls. The most important problems observed are the low wall index (the ratio of the total wall area to the floor plan area), i.e. insufficient amount of shear walls placed in the building to resist the earthquake loads in both directions, non-seismic detailing of the rebar lap splices and wall web reinforcement ends, which are only covered with concrete, the inadequacy of wall boundary element confinement reinforcement, unavailable crossties within boundaries and web of structural walls. A parametric study investigated the seismic deformation demands on rectangular wall members in frame-wall systems. The wall index was kept as a variable in frame-wall models, and its relation with the seismic demand at the base of the wall was investigated. 4, 8, and 12-story frame-wall models with wall indexes in the 0.2-2% range were analyzed using nonlinear time-history analysis and design spectrum-matched ground motion set. It was seen that wall boundary concrete compressive strains were much higher than the limits allowed in codes in frame-wall systems with low wall index in the range of 0.2-0.6% indicating to severe damage. It is proposed that in the design of dual systems where beams transfers moments and axial load on walls, the minimum value of the wall index should be greater than 0.6% to prevent excessive damage to wall members.eninfo:eu-repo/semantics/closedAccessStructural WallWall IndexWall PerformanceCompressive StrainShear Wall DesignTBDY-2018Conference Object