設(shè)防烈度對框架—核心筒結(jié)構(gòu)受力性能和材料用量的影響
[Abstract]:In order to investigate the effect of fortification intensity on the mechanical performance and material consumption of reinforced concrete frame-tube structure, the paper makes a full investigation of the super high-rise buildings built or under construction in China at present. In this paper, an office super high-rise of reinforced concrete frame-core tube is selected as the representative research object in the range of 150m, 12 calculation models with different intensity and height are established, and the periodic ratio, shear weight ratio, rigid-weight ratio of the structure are analyzed in detail. The variation of structural mechanical properties such as earthquake action and wind load, as well as the amount of steel used in the structure and the amount of concrete used in the structure with the intensity of fortification. The results show that for the Jinan Evergrande International Financial Center project, with the increase of fortification intensity, the natural vibration period of the structure decreases, the torsional cycle lags behind the translational period, the torsional effect decreases, and the shear weight ratio increases obviously. The structure in low intensity area is greatly affected by the second order effect of gravity, the whole stability is the main safety control factor, the influence of earthquake action increases with the increase of fortification intensity, and the steel quantity increases obviously after the building in 6 degree area exceeds 200 m. However, the amount of steel used in 8 degree area increases linearly with the building height, and the concrete content per unit area of 6 degree and 7 degree region is close to that of concrete in 8 degree zone, and the increase of concrete content in 8 degree area is about 19%, so the fortification intensity has a significant effect on the amount of structural engineering materials.
【作者單位】: 北京科技大學(xué)土木與資源工程學(xué)院;中國建筑設(shè)計研究院;
【基金】:國家自然科學(xué)基金資助項目(51578064) 北京市自然科學(xué)基金項目(8172031)
【分類號】:TU973.1
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