Nonlinear truss models for strain‐based seismic evaluation of planar RC walls

This paper introduces a new approach for the seismic performance evaluation of planar RC walls. Compared to existing assessment guidelines, such as those in ASCE/SEI 41-17, where limits are described by plastic rotation or lateral drift, proposed method uses local (strain) quantities, obtained from computational models. The analyses rely on user-friendly implementation nonlinear truss model structures, which eliminates need manually create line-element representation wall and includes material law steel accounting buckling rupture reinforcement. capability models capture common failure patterns walls is validated set six previously tested components experienced variety damage modes (bar rupture, boundary element failure, diagonal compression tension failures). analytical accurately predict strength, deformation capacity observed tests. A acceptance criteria, based analytically concrete strains, then established immediate occupancy, life safety collapse prevention levels, consistent with different levels types damage. An initial calibration limit values associated these criteria verified using results considered. methodology applied compared procedures 41-17. indicate that 41-17 may not describe deformability exhibiting mixed flexure-shear inelastic deformations.