Nonlinear Behavior of Reinforced Concrete Frames Equipped with and without Steel Plate Shear Wall under Sequence of Real and Artificial Earthquakes

There is a possibility of increasing structural damage in the sequential earthquake compared to main according past earthquakes. This study investigates effects seismic sequence on behavior and increased response reinforced concrete frames (RCF) with/without steel plate shear walls (SPSW). Four systems 4, 8, 12, 24 story, which represent low-, mid-, high-rise structures, are designed subjected nonlinear time history analysis under critical single consecutive records with real, repetitive, randomized methods. The scenarios used include recorded showed that predominant period after-shock significantly influences post main-shock response. In RCF without SPSW, real increases ratio peak maximum interstory drift by an average 2, 2 times similar demand shock, ductility 1.52 1.65 structure, respectively. artificial sequence, increase 100%, 150%, 200% after-shocks, iteration method, it equal 1.2, 2.0, 2.6 shock SPSW 1.9, 3.2, 4.8 SPSW. After-shocks may change direction magnitude residual displacement sequences. Continuation equation calculate for was extracted.