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（1 中國(guó)航空國(guó)際建設(shè)投資有限公司， 北京 100120； 2 清華大學(xué)土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室， 北京 100084； 3 中國(guó)建筑標(biāo)準(zhǔn)設(shè)計(jì)研究院有限公司， 北京 100048)

［摘要］在PERFORM 3D軟件中，建立了基于纖維模型理論、適用于鋼筋混凝土(RC)框架-核心筒結(jié)構(gòu)抗震性能評(píng)估的彈塑性分析模型，并給出了非線性模擬中所需要的鋼筋及混凝土材料本構(gòu)、連梁剪切鉸變形性能等其他參數(shù)建議取值。完成了多個(gè)RC框架及剪力墻構(gòu)件模型試驗(yàn)的模擬分析，表明建議模型對(duì)于分析RC結(jié)構(gòu)基本構(gòu)件具有較高的準(zhǔn)確性，計(jì)算效率高。利用建立的分析方法，完成了根據(jù)中美抗震設(shè)計(jì)規(guī)范分別設(shè)計(jì)的兩座相似的RC框架-核心筒高層結(jié)構(gòu)的建模和系列抗震分析。結(jié)果表明：峰值荷載前兩個(gè)方案的基底剪力-頂點(diǎn)位移曲線比較接近，美方設(shè)計(jì)方案結(jié)構(gòu)的初始剛度略大，峰值荷載后二者有所差異；模型結(jié)構(gòu)的屈服次序依次為連梁、框架梁、墻肢、框架柱，屈服次序合理，符合預(yù)期目標(biāo)，美方設(shè)計(jì)方案連梁屈服較早；在罕遇地震作用下，美方設(shè)計(jì)方案結(jié)構(gòu)x向的最大層間位移角約1/220，為中方設(shè)計(jì)方案的最大層間位移角的0-9倍；美方設(shè)計(jì)方案的連梁變形狀態(tài)介于生命安全狀態(tài)(LS)與防止倒塌狀態(tài)(CP)之間，中方設(shè)計(jì)方案連梁沒(méi)有超過(guò)生命安全狀態(tài)(LS)；美方設(shè)計(jì)方案底部?jī)?nèi)筒外壁受拉側(cè)墻肢彎矩沿層高分布略大于中方設(shè)計(jì)方案，兩個(gè)方案底層墻肢邊緣構(gòu)件豎向鋼筋的最大拉應(yīng)變分布接近，均剛剛進(jìn)入屈服水平。

［關(guān)鍵詞］RC框架-核心筒結(jié)構(gòu)； 彈塑性分析； 抗震性能； 性能點(diǎn)

中圖分類號(hào)：TU375文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)07-0009-09

Elasto-plastic analysis model and typical example analysis of RC frame-corewall structure

HU Yu1, ZHAO Zuozhou2, QIAN Jiaru2, HAN Wenlong3

(1 China Aviation International Construction and Investment Co., Ltd., Beijing 100120, China;  2 Tsinghua University Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Beijing 100084, China; 3 China Institute of Building Standard Design & Research, Beijing 100048, China)

Abstract:In PERFORM 3D software, an elasto-plastic analysis model based on fiber model theory was established suitable for seismic performance evaluation of reinforced concrete (RC) frame-corewall structures. The recommended values of the constitutive properties of the reinforced and concrete materials, the shear hinge deformation parameters of the coupling beams and other parameters were given. The simulation analysis of multiple RC frame and shear wall component model tests was completed, indicating that the proposed model had high accuracy and high calculation efficiency for the analysis of basic components of RC structure. Using the established analysis method, the elasto-plastic analysis modeling and series seismic analysis were conducted on the two similar RC frame-corewall high-rise building structures designed according to the China-US seismic design codes. The results show that the base shear force-top displacement curves of the  two schemes before reaching peak load are relatively close, and the initial stiffness of the structure of the American design scheme is slightly larger. After the peak load, the two schemes are different. The yield sequence of the model structure is coupling beams, frame beams, wall limbs, and frame columns, which is reasonable and meets the expected goals. The coupling beam yields earlier in the American design scheme. Under the action of rare earthquakes, the maximum storey drift in the x direction of the American design scheme is about 1/220, which is 0-9 times that of the Chinese design scheme. The deformation state of the coupling beam in the American design scheme is between life safety state (LS) and the collapse prevention state (CP), and the coupling beam in the Chinese design scheme does not exceed the life safety state (LS). The bending moment distribution along the floor height of the lateral wall limbs of core tube of the American design scheme is slightly larger than that of the Chinese design scheme, and the maximum tensile strain distributions of the vertical reinforcement of the edge members of the bottom wall limbs of the two schemes are close, and the vertical reinforcements have just entered the yield level.

Keywords:RC frame-core wall structure; elasto-plastic analysis; seismic performance; performance point

作者簡(jiǎn)介：胡妤，碩士，工程師，Email:huyu@avic-aic.com。