A Comparative Study On Wind-induced Response Analysis Methods For Large Complex Statue Structures

Large complex statue structure is characterized by:irregular layout of the structure,the structure of complex and diverse,large height to width ratio.This directly leads to large complex statue structures belonging to wind-sensitive structures.For large complex statue structure,the horizontal load plays a controlling role,in which the wind load is its most important control load.Based on the background of Huangshi City,Hubei Province pharmacist Buddha,this paper uses the static equivalent wind load method,the time history analysis method and the fluid-solid coupling method to calculate the wind load of the main steel frame,the three calculation methods are briefly introduced and compared.Through the analysis and research,the following main conclusions are obtained:First of all,the static equivalent wind load method,the time history analysis method and the fluid-solid coupling method are becoming more and more close to the real wind load.The static equivalent wind load method is the essence of the wind load from the random dynamic load into static load in the form of structural design,the static load acting on the structure caused by the structure and the wind load as a dynamic load on the structure The resulting displacement,stress,strain and other effects are exactly the same,static equivalent wind load method,also known as quasi-static method.The essence of the wind-induced response time-history analysis method is to obtain the dynamic equation of the structure by simulating or measuring the wind load time course.The direct integral method is used to solve the equation,and the displacement,velocity and acceleration response are obtained.The essence of the unidirectional fluid-solid coupling method is to transform the wind field into the wind pressure,and then apply the wind pressure to the structure to obtain the displacement,stress,strain and so on.The effect of the deformation of the image structure on the wind field needs to be considered in the two-way fluid-solid coupling,and then the above calculation process is carried out in the cycle.Secondly,in order to ensure that the statue structure is reasonable and stable,it is usually used frame-support system,reasonable layout of the frame beam and support,reasonable,in order to ensure that the structure of the statue is reasonable and stable,Layout of the floor level support and vertical support,while the local construction area to consider strengthening support.Using a uniform symmetry arrangement as much as possible to minimize the difference between the mass center and the stiffness center of each layer.Thirdly,statue structure under the action of wind load due to irregular facade modeling,the surface of the wind pressure distribution is very complex,follow the general law of the flow around the blunt body.In the usual design process,according to the results of the numerical simulation of the wind-induced response of the image structure,the body size of the conservative structure of the statue is chosen to be about 10%higher than that of the rectangular building.Fourthly,the corresponding wind speed time course programmed by the linear filter method is accurate and can be used for the time history analysis of the wind response of the structure.The result of the wind-induced time-history analysis of the statistic structure of the pulsating wind is basically twice as much as that of the static equivalent wind load method,the results of the time history analysis are more conservative and the dynamic response is significantly greater than the static response.Finally,in the wind field,the wind pressure of the windward structure in the wind field is generally symmetrical.The wind pressure increases with the increase of the height,and the high wind pressure zone of the windward side of the body moves toward the height,and the low speed area of the leeward side while the domain is getting smaller and smaller.The lateral wind pressure distribution is uneven.Considering the effect of wind-induced response,the facade of the statue structure is preferably a smooth convex surface,and the structural stability and safety of the convexity of the convex surface are higher and the anti-lateral stiffness should be increased under the same conditions.