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(北京市建筑設(shè)計研究院有限公司， 北京 100045)
［摘要］結(jié)合工程實例，分析了墻肢拉應(yīng)力的影響因素，給出了核心筒墻肢型鋼的設(shè)計流程。結(jié)果表明：墻肢平均名義拉應(yīng)力與鋼材牌號、混凝土強(qiáng)度等級及含鋼率有關(guān)；對于采用Q235鋼材的墻肢，不存在無效含鋼區(qū)，采用其他鋼材的墻肢均存在無效含鋼區(qū)；建議Q345，Q390，Q420的界限含鋼率分別為2-3%，2-1%，1-9%；根據(jù)受拉墻肢型鋼設(shè)計流程可準(zhǔn)確判斷滿足設(shè)計要求的墻肢含鋼率，避免由于無效含鋼區(qū)的存在而造成的試算、迭代，顯著提高設(shè)計效率。
［關(guān)鍵詞］超高層結(jié)構(gòu)； 中震； 拉應(yīng)力； 無效含鋼區(qū)
中圖分類號：TU973文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2016)17-0084-04
Analysis and design on tension stress of corewall in super high-rise structures under fortification earthquake
Ma Kai
(Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract:Influencing factors on corewall tension stress were analyzed combined with practical engineering, and the design procedure of section steel in the corewall was given. The results show that the average nominal tension stress of the wall is related to steel type, concrete type and steel ratio. There is no region of ineffective steel ratio in the wall using Q235 steel but region of ineffective steel ratio is found in the wall using other types of steel. The limit steel ratio of Q345, Q390 and Q420 steel is suggested to be 2-3%, 2-1% and 1-9% respectively. The wall steel ratio meeting the design requirements is judged accurately according to the section steel design procedure of the corewall with tension forces, which can avoid trial calculation and iteration due to the existence of the region of ineffective steel ratio to improve design efficiency obviously.
Keywords:super high-rise structure； fortification earthquake； tension stress； region of ineffective steel ratio
作者簡介：馬凱，碩士，工程師，Email：mk-14132008@163.com。
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