Reliability-Based Design of Non-Linear Timber Structures subject to Seismic Loading

摘要

A reliability approach applied to timber structures under seismic excitation isrnproposed on the basis of first order reliability method. The mechanical behaviour ofrntimber joints made of punched metal plate fasteners is described by a newrnbidimensional anisotropic hysteresis law. The finite element model is validatedrnthrough comparison of the relevant mechanical response, such as dissipated energyrnand maximal force, to experimental results. The uncertainties are taken into accountrnin the numerical model through random variables representing the parameters of thernhysteresis law. A sensitivity analysis, based on stochastic collocation method, hasrnrevealed the importance of the input parameters. This analysis allows us to reducernthe dimension of the random space when performing the reliability analysis. Thernproposed reliability approach is low time consuming, since the convergence is wellrnachieved using a limited number of finite element analyses.