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(1 中國建筑設(shè)計(jì)研究院， 北京 100044； 2 北京建筑大學(xué)土木與交通工程學(xué)院， 北京 100044；3 中國石化集團(tuán)北京設(shè)計(jì)院， 北京100011)

［摘要］針對(duì)框架-核心筒結(jié)構(gòu)聯(lián)肢剪力墻的特點(diǎn)，提出根據(jù)相鄰左、右墻肢變形確定連梁變形的計(jì)算方法。分別對(duì)高度為180m和300m的框架-核心筒結(jié)構(gòu)進(jìn)行在多遇地震和罕遇地震作用下的彈塑性動(dòng)力時(shí)程分析，考察連梁在整體結(jié)構(gòu)中的變形情況。在多遇地震作用下，連梁剛度較大，左、右墻肢在傾覆力矩作用下的拉、壓變形較大，大部分連梁的變形角明顯小于結(jié)構(gòu)的層間位移角。結(jié)構(gòu)加強(qiáng)層對(duì)附近樓層變形具有明顯的抑制作用，連梁變形很小。在罕遇地震作用下，連梁剛度退化顯著，左、右墻肢在傾覆力矩作用下的拉、壓變形減小，大部分連梁的變形角大于結(jié)構(gòu)的層間位移角。在不同地震波作用下連梁的變形差異顯著，在罕遇地震作用下的最大變形角可達(dá)1/40。在進(jìn)行結(jié)構(gòu)抗震設(shè)計(jì)時(shí)，應(yīng)保證連梁具有足夠的塑性變形能力。

［關(guān)鍵詞］框架-核心筒； 連梁； 彈塑性時(shí)程分析； 變形

中圖分類號(hào)：TU394文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)09-0001-08

Study on deformation characteristics of coupling beams in frame-core structures

Fan Zhong1, Wang Haibo1,2, Liu Yunbo3, Zhu Dan1, Pei Yuchen1,2, Liu Xuelin1， Wang Yihua1

(1 China Architecture Design & Research Group, Beijing 100044， China; 2 School of Civil Engineering and Transportation， Beijing University of Civil Engineering and Architecture， Beijing 100044， China; 3 Beijing Design Institute of SINOPEC, Beijing 100011， China)

Abstract:According to the characteristics of pier shear walls in frame-core structures, an evaluation method for the deformation of the coupling beams was proposed based on displacements of the adjacent wall segments. The elasto-plastic dynamic time-history analyses of the frame-core structures with the height of 180m and 300m were carried out in the case of frequent earthquakes and rare earthquakes, and the deformation of the coupling beams in the whole structure was investigated. Because the stiffness of coupling beams is relatively larger during frequent earthquake loading, the tension and compression deformations in the both wall segments are obvious caused by overturning moments, and the deformation rotations of the most coupling beams are smaller than the inter-story drift ratio of the building structure. Outrigger trusses have strong constrain effect on the adjacent region of the structure, and the deformation of the coupling beams nearby is quite small. Under rare earthquake actions, the stiffness degradation of coupling beams is significant, and the tension and compression deformations in the both wall segments are reduced under overturning moments, and the deformation rotations of the most coupling beams are larger than the inter-story drift ratio of the building structure. The magnitude of deformation response for the coupling beams during the different seismic waves is quite different, the maximum deformation rotation of them can reach 1/40 under rare earthquake actions. So, in earthquake resistant design of the frame-core structures, sufficient plastic deformation capacity should be ensured for the coupling beams.

Keywords:frame-core structure; coupling beam; elasto-plastic time history analysis; deformation

作者簡(jiǎn)介：范重，博士，教授級(jí)高級(jí)工程師，Email: fanz@cadg.cn。