Study Of Wind Tunnel Test And Wind Load Of The Long-span Retractable Roof Structure

With the development of our domestic economy and scientific technologies, largespan spatial structures have been widely used in stadiums, coach and train stations,etc. Large span spatial structure has high wind sensitivity, and the wind load carriesisone of the main loads that controls its structure design to carry. At the same time withthe features of lightweight, high flexibility, and low damping, it is of greatsignificance to carry on research on the wind resistance of long-span roof structure.Retractable roof structure is an innovative architecture structure, it is a resultleaded by people’s increasing requirements on the functions of courts, stadiums andstations. This structure breaks the traditional boundary of indoor and outdoor, andcould allow a free switch between indoor environment and outdoor environment dueto different weather conditions. Currently, there are plenty of researches on the windresistance of large span structures, seldom researchers focus on the wind resistancestudy on long-span retractable roof structure. This thesis applied Wuhan GuangguTennis Stadium as engineering research sample, systematically carried out research onthe wind resistance of the structure.This thesis introduced relevant theories on rigid model and wind tunnel test indetail, and implemented pressure wind tunnel tests under the conditions of open andclose of the stadium. After the experiment, the author contrastively analyzed thedistribution characteristics of the wind pressure distribution of the stadium roof in theconditions of the open and close of the roof respectively. The author also studied therules of change of wind, distribution of head-on wind, and the change of windpressure along the height of the stadium roof. The study based on the finite elementmodel and the analysis of structure modality leaded to the result of acquirement of thestructure’s natural vibration feature. And using the data gained in wind tunnel tests ofthe stadium, and the wind vibration response and coefficient of multi-modality andforce method structure, the author researched the distribution of displacementresponse of the roof. And the research also contrastively analyzed the impact ondistribution of displacement response and wind-induced vibration coefficient underthe circumstance of different wind directions, different modality and the open andclose of the roof. Based on the original multi-modal force method calculation on windvibration coefficient, consider the probability of contribution to wind-induced response by various vibiration mode according to different modalities’ frenquency andrecombine multi-modal’s corresponding frequency to analyze the Wind vibrationcoefficient of the roof, and contrastive analysis with the original method, and haveproved the reliability and rationality of the new method.