【摘要】：為了考察設(shè)防烈度對(duì)鋼筋混凝土框筒結(jié)構(gòu)受力性能、材料用量的影響,在充分調(diào)研了目前我國(guó)100 m以上已建或在建超高層建筑的基礎(chǔ)上,選擇150~300 m范圍內(nèi)鋼筋混凝土框架—核心筒辦公類超高層作為代表性研究對(duì)象,建立了12個(gè)不同烈度、不同高度下的計(jì)算模型,詳細(xì)分析了其結(jié)構(gòu)的周期比、剪重比、剛重比、地震作用和風(fēng)荷載影響等結(jié)構(gòu)受力性能以及結(jié)構(gòu)的用鋼量、混凝土用量隨設(shè)防烈度的變化情況.研究結(jié)果表明,對(duì)于濟(jì)南恒大國(guó)際金融中心工程,隨著設(shè)防烈度的提高,結(jié)構(gòu)自振周期減小,扭轉(zhuǎn)周期滯后于平動(dòng)周期,扭轉(zhuǎn)效應(yīng)減小,而結(jié)構(gòu)剪重比明顯增加;低烈度地區(qū)結(jié)構(gòu)受重力二階效應(yīng)的影響較大,整體穩(wěn)定性成主要安全控制因素;地震作用的影響隨設(shè)防烈度的增加而增大;6度區(qū)建筑超過200 m后,用鋼量明顯增加,而8度區(qū)用鋼量隨建筑高度呈線性增長(zhǎng);6度和7度區(qū)單位面積混凝土用量接近,而8度區(qū)混凝土用量增幅約為19%左右,所以設(shè)防烈度對(duì)結(jié)構(gòu)工程材料用量影響顯著.
[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.
【作者單位】： 北京科技大學(xué)土木與資源工程學(xué)院;中國(guó)建筑設(shè)計(jì)研究院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51578064) 北京市自然科學(xué)基金項(xiàng)目(8172031)
【分類號(hào)】：TU973.1

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