建筑高度對框架-核心筒結(jié)構(gòu)性能與造價影響研究
范重1，馬萬航1,2，王義華1，趙紅1
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（1 中國建筑設(shè)計研究院, 北京 100044; 2 北京科技大學(xué)土木與環(huán)境工程學(xué)院, 北京 100083）
［摘要］為了考察建筑高度與設(shè)防烈度對鋼筋混凝土框架-核心筒結(jié)構(gòu)受力性能、材料用量以及工程造價的影響，對不同設(shè)防烈度、建筑高度150～300m的超高層辦公樓進(jìn)行了深入研究。分別對12個模型進(jìn)行了非抗震工況組合與抗震工況組合計算，詳細(xì)分析結(jié)構(gòu)的自振周期、扭轉(zhuǎn)平動周期比、單位面積質(zhì)量、剪重比與底部傾覆力矩、最大層間位移角、頂點(diǎn)加速度以及結(jié)構(gòu)整體穩(wěn)定性等隨建筑高度與設(shè)防烈度的變化情況。結(jié)果表明，設(shè)防烈度對結(jié)構(gòu)自振周期影響較大，當(dāng)建筑高度超過200m后，低烈度區(qū)結(jié)構(gòu)基本自振周期大于現(xiàn)有研究的估算值，扭轉(zhuǎn)效應(yīng)隨建筑高度的增加而減??；單位面積質(zhì)量的增速高于建筑高度的增速，剪重比隨建筑高度增加而逐漸減?。粚τ诘土叶葏^(qū)，超高層建筑的整體穩(wěn)定性成為結(jié)構(gòu)安全性的主要控制因素；當(dāng)建筑高度超過200m時，橫風(fēng)向作用產(chǎn)生的頂點(diǎn)加速度與層間位移角逐漸超過順風(fēng)向作用產(chǎn)生的；隨著建筑高度增加，單位面積用鋼量增長迅速，建筑高度與設(shè)防烈度對結(jié)構(gòu)工程造價影響顯著。［關(guān)鍵詞］框架-核心筒結(jié)構(gòu); 動力特性; 層間位移角; 整體穩(wěn)定性; 用鋼量; 混凝土折算厚度; 工程造價中圖分類號：TU375 文獻(xiàn)標(biāo)識碼：A 文章編號：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
作者簡介：范重，博士，教授級高級工程師，Email: fanz@cadg.cn。
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