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（1 山東省環(huán)科院環(huán)境工程有限公司， 濟(jì)南 250000； 2 大連大學(xué)材料破壞力學(xué)數(shù)值試驗(yàn)研究中心， 大連 116600； 3 鄭州大學(xué)土木工程學(xué)院， 鄭州 450001）
［摘要］鋼筋混凝土核心筒作為高層建筑結(jié)構(gòu)中的一種重要抗側(cè)力構(gòu)件，對其進(jìn)行彎剪扭組合作用下力學(xué)性能研究非常具有必要性?；谝延械脑囼?yàn)基礎(chǔ)，對所選取試驗(yàn)?zāi)Ｐ瓦M(jìn)行合理的有限元建模與分析，所得到的分析結(jié)果與原有試驗(yàn)結(jié)果吻合良好。在此基礎(chǔ)上對鋼筋混凝土核心筒有限元模型進(jìn)行偏心推覆加載分析，并考慮了高寬比、連梁配筋率、軸壓比、偏心率對核心筒承載力的影響。結(jié)果表明：在偏心荷載作用下，隨高寬比增加，核心筒承載力降低，破壞模式向彎扭破壞轉(zhuǎn)變；連梁配筋率提高有利于提高筒體承載力；筒體承載力隨軸壓比的增加呈現(xiàn)先增加后減小的趨勢，過大的軸壓比將導(dǎo)致筒體的脆性破壞；隨偏心率增加，筒體承載力下降，但偏心率的增加在一定程度上對于筒體的延性發(fā)揮有利。
［關(guān)鍵詞］鋼筋混凝土核心筒； 偏心加載； 承載力； 非線性有限元分析
中圖分類號：TU375-4文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)24-0083-06
Nonlinear finite element analysis of reinforced concrete core walls
Chen Dong1, Fan Cheng2, Sun Shaoli1, Xu Tao2, Li Yaoliang3
(1 Environmental Engineering Co., Ltd., of Shandong Academy of Environmental Science, Jinan 250000, China; 2 Research Center for Numerical Tests on Material Failure, Dalian University, Dalian 116600, China; 3 School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)
Abstract:It was very necessary to study the mechanical properties of reinforced concrete core walls under the comprehensive load which including bending, shear and torsion, because the reinforced concrete core walls work as an important anti-lateral force component in high-rise building structures. The finite element models were established and analyzed reasonably based on the test and the results fit the test well. Based on the abave results, the eccentric loading analysis was applied on the finite element models to analyze the copacity of concrete core walls, and the height-width ratio, reinforcement ratio of coupling beam, the axial compression ratio and eccentricity was considered in this simulation process. The results show that:under the eccentric load, the load-carrying capacity decreases with the increase of height-width ratio and the failure mode turns to bending torsion failure; the load-carrying capacity increases with the increase of the coupling beam reinforcement ratio; the load-carrying capacity increases at the beginning and then decreases with the increase of axial compression ratio and the excessive axial compression ratio will lead to a brittle failure mode; the increase of eccentricity ratio will result in the decrease of load-carrying capacity, but the increase of eccentricity ratio will contribute to the development of ductility for reinforced concrete core walls.
Keywords:reinforced concrete core wall; eccentric loading; load-carrying capacity; nonlinear finite element analysis
作者簡介：陳棟，碩士，Email：chendong200704005@163.com。
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