Seismic Collapse Risk Assessment of Braced Frames under Near-Fault Earthquakes

Special concentrically braced frames (SCBFs) located in regions close to earthquake faults may be subjected near-fault ground motions, often characterized by pulses with long periods. These could impose additional seismic demands on structures and increase the risk for structural collapse. Currently, there is limited research collapse of SCBFs under earthquakes. This paper uses a general simulation-based framework assess To quantify large variability uncertainty associated hazard, stochastic motion (SGM) model used where pulse characteristics are explicitly incorporated. The uncertainties SGM parameters (including characteristics) addressed through appropriate selection probability distribution functions. accurately predict occurrence collapse, numerical models capable capturing nonlinear behavior established used. Efficient simulation approaches proposed estimate or without considering pulse. As an illustration, risks two investigated compared. Probabilistic sensitivity analysis also carried out investigate importance uncertain within towards risk.