Wind tunnel test and equivalent static wind loads on large span station buildings

Taking Harbin west railway station as the researching object, the wind load distribution on a rigid model was measured simultaneously in a wind tunnel firstly. The fluctuating wind pressure field was reconstructed based on the synchronous multi-pressure scanning technique of wind tunnel tests and the proper orthogonal decomposition (POD) technique in order to eliminate the mismatch of the measurement points in wind tunnel tests and the structural nodes. Then the finite element models of the upper steel structure and the whole structure were constructed respectively and the influence of lower RC structure on wind-induced vibration was investigated. The study finds out that the stiffness degradation due to the neglection of the lower RC structure will result in an underestimation of the wind-induced response. At last, equivalent static wind loads (ESWL) for multi-objective were estimated for structural design. A new method was introduced to obtain ESWL that reproduce all largest load effects at the same time. The largest load effects obtained by the ESWL show good agreement with those directly estimated by time domain response analysis.