Reliability assessment of a building complex with four long-span roof structures based on wind tunnel experiments

A building complex consisting of four identical long-span roof structures are tested in the wind tunnel to determine dynamic wind loads on structures. Based on the time-history data of spatially distributed wind pressure, wind-induced vibration analyses of the structures under varying incident wind attack angles have been carried out in time-domain. Then a novel framework for assessing dynamic wind resistance reliability has been proposed by integrating wind tunnel experiment, Monte Carlo simulation method, and the non-Gaussian wind pressure field simulation technique. The framework takes into account the uncertainties of design wind speed, wind directionality and structural damping ratio, as well as the randomness of Non-Gaussian wind pressure field. It has been demonstrated that the proposed framework is effective and efficient to comprehensively assess the wind-induced dynamic reliability of the long-span roof structure in the rectangular array. The annual failure probability of the long-span roof structure is obtained by considering the first passage reliability of displacement responses.