建筑高度对框架-核心筒结构性能与造价影响研究
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（1 中国建筑设计研究院, 北京 100044; 2 北京科技大学土木与环境工程学院, 北京 100083）
［摘要］为了考察建筑高度与设防烈度对钢筋混凝土框架-核心筒结构受力性能、材料用量以及工程造价的影响，对不同设防烈度、建筑高度150～300m的超高层办公楼进行了深入研究。分别对12个模型进行了非抗震工况组合与抗震工况组合计算，详细分析结构的自振周期、扭转平动周期比、单位面积质量、剪重比与底部倾覆力矩、最大层间位移角、顶点加速度以及结构整体稳定性等随建筑高度与设防烈度的变化情况。结果表明，设防烈度对结构自振周期影响较大，当建筑高度超过200m后，低烈度区结构基本自振周期大于现有研究的估算值，扭转效应随建筑高度的增加而减小；单位面积质量的增速高于建筑高度的增速，剪重比随建筑高度增加而逐渐减小；对于低烈度区，超高层建筑的整体稳定性成为结构安全性的主要控制因素；当建筑高度超过200m时，横风向作用产生的顶点加速度与层间位移角逐渐超过顺风向作用产生的；随着建筑高度增加，单位面积用钢量增长迅速，建筑高度与设防烈度对结构工程造价影响显著。［关键词］框架-核心筒结构; 动力特性; 层间位移角; 整体稳定性; 用钢量; 混凝土折算厚度; 工程造价中图分类号：TU375 文献标识码：A 文章编号：1002-848X(2016)12-0001-10
Research on the influence of building height on structural performance & cost of frame-corewall structureFan Zhong1, Ma Wanhang1,2, Wang Yihua1, Zhao Hong1（1 China Architecture Design & Research Group, Beijing 100044, China; 2 School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China）Abstract: In order to investigate the effects of building height and seismic precautionary intensity on the structural behavior, material consumption and engineering cost of frame-corewall structures, the super high-rise office buildings with 150m to 300m height under different seismic intensities were studied. Considering non-seismic and seismic load cases, twelve analytical models were calculated. According to building height and seismic intensity, the natural vibration period, torsion-translation period ratio, mass per unit area, shear-weight ratio, overturning moment, maximum inter-story drift angle, acceleration at top level, as well as the overall stability were analyzed. The results show that seismic intensity has great impact on the structure vibration period. When the building height is more than 200m, the natural vibration period of the structure in low seismic intensity area are greater than the estimation by existing research, and the torsion effect decreases with the increase of building height. Mass per unit area grows faster than the growth rate of building height, and the shear force-gravity ratio decreases gradually with increasing of building height. For low seismic intensity area, the overall stability of the super high-rise building has become a major factor of structural safety. For the building height of more than 200m, the acceleration at top and inter-story drift angle produced by cross-wind gradually exceeds those produced by longitudinal wind. Along with building height increase, the steel amount per unit area grows rapidly and the structural engineering cost is controlled significantly by building height and seismic intensity.Keywords: frame-corewall structure; dynamic characteristic; inter-story drift angle; overall stability; steel amount; equivalent thickness of concrete; engineering cost
作者简介：范重，博士，教授级高级工程师，Email: fanz@cadg.cn。
