This paper focuses on the finite element (FE) response sensitivity and reliability analyses considering smooth constitutive\r\nmaterial models. A reinforced concrete frame is modeled for FE sensitivity analysis followed by direct differentiation\r\nmethod under both static and dynamic load cases. Later, the reliability analysis is performed to predict the seismic behavior of the\r\nframe. Displacement sensitivity discontinuities are observed along the pseudo-time axis using non-smooth concrete and reinforcing\r\nsteel model under quasi-static loading. However, the smooth materials show continuity in response sensitivity at elastic to\r\nplastic transition points. The normalized sensitivity results are also used to measure the relative importance of the material\r\nparameters on the structural responses. In FE reliability analysis, the influence of smoothness behavior of reinforcing steel is\r\ncarefully noticed. More efficient and reasonable reliability estimation can be achieved by using smooth material model compare\r\nwith bilinear material constitutive model.
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