Study On Wind-Tunnel Experiment Of The Main Station House For Qingdao New Railway Station

In recent years, large-span roof structures are widely used in public buildings, and such structures are very sensitive to wind loads, Thus the wind load become one of the main load in designing the span roof structures. Because such a large span structures with various shapes, when the structural design, existing norms and existing datas can’t meet the demand of structural design for getting the security parameters related to wind loads, the current mainly solution is through wind tunnel experiments for the proposed building model, to determining the parameters of wind load on the surface, such these measures can ensure the design safety.In this paper, through carrying on the rigid model wind tunnel experiment of the proposed Qingdao Railway Station Master house according to similarity theory, by simulating the atmospheric boundary layer and the building site under the conditions of the surrounding terrain, there is a wind tunnel experiment under the full range of wind direction has been done in the wind tunnel. After processing the pressure data collected, obtaining the wind pressure distribution of roof surface under varieties of wind conditions, mapping average wind pressure coefficient distribution contour map and shape factor distributionshape factor of Qingdao Railway Station Master house under varieties of wind conditions, using average wind pressure coefficient distribution contour map and shape factor distributionshape factor of the roof under varieties of wind conditions, analyzing the wind-induced response of Railway Station Master house throung ANSYS finite element software, obtaining three directions of wind-induced displacement coefficient of the Structure pulse response, analyzing the characteristics of surface pressure distribution nd the wind-induced vibration response.The main conclusion of the article:The average wind pressure of the master house roof is mainly negative, the distribution of pulse pressure is similar to that of the average wind pressure, the shape coefficient of the cantilevered portion of the roof is variational by the angle of the wind,the shape coefficient extreme value is larger than that of the specification, the cantilevered portion of the roof need to consider the positive and negative pressure under the most unfavorable load conditions; Dynamic response of the main station house is considered of the impact of higher modes, the displacement wind vibration coefficient of roof in three directions is approximately the same under the same wind direction, and little change in wind direction angle, the displacement wind vibration coefficient of the entire roof districts are thinkde to take the value of1.62considered uniform wind-induced response.