Research Of Wind Resistance And Fatigue On Large Statue Of Irregular Structure

For statue buildings, different from ordinary high-rise buildings, the appearance is more special, so that the structure arrangement is abnormal irregular, and structure force is very complicated. In this paper, the object of study is Macau heroes statue, which is 55m and located in Macau taipa island. Research the structure of such a large statue of irregular wind resistance and wind-induced fatigue problem. Find out the weak link, make local strengthening.Through the analysis, the following main conclusions:1. Through the modal analysis of structure, the torsion effect on structure is not obvious. The influence of the structure of the torsional ability is good. By the previous order modal can be seen that the weak parts of the structure.2. Due to the appearance of large statue of irregular structure is extremely irregular. This article adopts the refinement of SOLIDWORKS based outside the building model. The calculation results by the bar than before the establishment of the rough outer contour model is more precise. Then this article simulates and analyses the numerical wind tunnel by using FLUENT software. Through the analysis of like body overall wind pressure coefficient distribution, shape coefficients of the structure of the statue, case-by-case basis. In this paper the background of the engineering of shape coefficient in the rectangular shape coefficient on the basis of 10% increase in order to ensure safety.3. In view of the large statue of irregular structure, using the linear filter method, considering the vertical correlation of fluctuating wind, ignoring the interaction between structure and the wind, choose Kaimal pulsating wind spectrum, the wind vibration response the analysis of structure. Drawing a control effect to the displacement of structure is the first vibration mode of the structure. The wind vibration analysis used to get displacement is much larger than the load code for the calculation of displacement. Among them, with high ratio of lateral larger as the weak position of the structure. It is usually a long cantilever bar of large span for the weak link of the structure. It does not meet the specification for design of high-rise structure with highly than lateral limit of. It can do some processing on the weak position, change the material, light weight, high strength to replace the existing material, or open hole in the weak component. It can reduce the displacement.4. For a large statue of irregular structure, after the horizontal wind vibration analysis, if the structure resonance zone starting point height is greater than the peak elevation structure, structure of resonance will not occur on the transverse direction. The wind vibration response of the structure are mainly composed of wind. It can usually ignore the wind vibration response of the structure on the transverse direction.5.Through the modal analysis of large statue of irregular structure and the wind vibration response analysis concluded that the weak position of the structure. The weak link of them adopt finite element fatigue analysis by the software MSC on wind-induced fatigue analysis, then evaluate the fatigue life. It is concluded that in the long-term wind load under the action of repeatedly. This kind of structure is prone to fatigue damage. It must be taken to improve its ability to resist fatigue in a local reinforcement measures.6. By changing the stress amplitude, mean stress and structure parameters such as the material of fatigue analysis, the influence on the fatigue damage is the biggest stress amplitude, mean stress and material has certain influence to the fatigue damage, due consideration when fatigue analysis.