设防烈度对框架—核心筒结构受力性能和材料用量的影响
发布时间：2018-10-12 07:41
【摘要】：为了考察设防烈度对钢筋混凝土框筒结构受力性能、材料用量的影响,在充分调研了目前我国100 m以上已建或在建超高层建筑的基础上,选择150~300 m范围内钢筋混凝土框架—核心筒办公类超高层作为代表性研究对象,建立了12个不同烈度、不同高度下的计算模型,详细分析了其结构的周期比、剪重比、刚重比、地震作用和风荷载影响等结构受力性能以及结构的用钢量、混凝土用量随设防烈度的变化情况.研究结果表明,对于济南恒大国际金融中心工程,随着设防烈度的提高,结构自振周期减小,扭转周期滞后于平动周期,扭转效应减小,而结构剪重比明显增加;低烈度地区结构受重力二阶效应的影响较大,整体稳定性成主要安全控制因素;地震作用的影响随设防烈度的增加而增大;6度区建筑超过200 m后,用钢量明显增加,而8度区用钢量随建筑高度呈线性增长;6度和7度区单位面积混凝土用量接近,而8度区混凝土用量增幅约为19%左右,所以设防烈度对结构工程材料用量影响显著.
[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.
【作者单位】： 北京科技大学土木与资源工程学院;中国建筑设计研究院;
【基金】：国家自然科学基金资助项目(51578064) 北京市自然科学基金项目(8172031)
【分类号】：TU973.1
[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.
【作者单位】： 北京科技大学土木与资源工程学院;中国建筑设计研究院;
【基金】：国家自然科学基金资助项目(51578064) 北京市自然科学基金项目(8172031)
【分类号】：TU973.1
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