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（1 北京未來城市設(shè)計(jì)高精尖創(chuàng)新中心， 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 東南大學(xué)土木工程學(xué)院， 南京 210096； 4 北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045)

［摘要］合理控制隔震支座拉應(yīng)力是RC框架-核心筒高層隔震結(jié)構(gòu)設(shè)計(jì)的關(guān)鍵難點(diǎn)問題。采用4種拉應(yīng)力控制方法對(duì)一抗震設(shè)防烈度為8度（0.3g）、高度為98.1m的基本案例進(jìn)行了拉應(yīng)力控制，綜合考慮控制效果和上部結(jié)構(gòu)材料用量對(duì)比分析了各方法的優(yōu)劣。結(jié)果表明：增大結(jié)構(gòu)整體剛度可較好控制拉應(yīng)力，但會(huì)顯著提升材料用量和工程造價(jià)；調(diào)整支座方案可一定程度降低拉應(yīng)力，基本不會(huì)改變隔震設(shè)計(jì)關(guān)鍵指標(biāo)；優(yōu)化外框架與內(nèi)核心筒尺寸也可較好控制拉應(yīng)力且基本不會(huì)改變材料用量和工程造價(jià)；優(yōu)化外框架與內(nèi)核心筒尺寸，結(jié)合支座優(yōu)化可獲得與增大結(jié)構(gòu)整體剛度相近的控制效果。在此基礎(chǔ)上，提出了適用于該類結(jié)構(gòu)的拉應(yīng)力優(yōu)化控制流程體系，相比于傳統(tǒng)方法，可采用較少的額外經(jīng)濟(jì)投入獲得更好的拉應(yīng)力控制效果。相關(guān)研究成果可為RC框架-核心筒高層隔震結(jié)構(gòu)的設(shè)計(jì)提供參考。

［關(guān)鍵詞］高層隔震結(jié)構(gòu)； 框架核心筒； 拉應(yīng)力； 控制方法； 材料用量

中圖分類號(hào)：TU973+.17文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)01-0094-06

Research on the control methods for bearing tensile stress of seismically isolated RC framecore tube tall buildings

YIN Chuanyin1,2, XIE Linlin1,2, LI Aiqun1,2,3, ZENG Demin1,2, CHEN Xi4, GE Dongdong4, YANG Cantian3

(1 Beijing Advanced Innovation Center for Future Urban Design, Beijing 100044, China; 2 School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 3 School of Civil Engineering, Southeast University, Nanjing 210096, China; 4 Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:A key problem for the seismic design of seismically isolated RC frame-core tube tall buildings is to rationally control the tensile stress of isolators. Four control methods were adopted to control the tensile stress for a basic case, which was a RC frame-core tube tall buildings with a height of 98.1m and a seismic intensity of 8 degree（0.3g）. The advantages and disadvantages of four methods were compared with the considerations of control effect and material consumption of the superstructure. The results indicate that the tensile stress could be well controlled by increasing the overall structural stiffness, while the material consumption and engineering cost significantly increase. Through the adjustment of isolators, the tensile stress could reduce to a certain extent and other critical indexes will not change. The size optimizations of outer frame and inner core tube could also well control the tensile stress without changing the material consumption and engineering cost. Furthermore, in combination with the adjustment of isolators, the control effect achieved by increasing the overall structural stiffness can be obtained. Based on these, an optimization process for controlling the tensile stress is proposed for seismically isolated RC frame-core tube tall buildings. In comparison with the traditional method, a better control effect can be achieved with less economic investment. The research outcome will assist in providing a useful reference for the design of seismically isolated RC frame-core tube tall buildings.

Keywords:seismically isolated tall building; frame-core tube; tensile stress; control method; material consumption

*國家重點(diǎn)研發(fā)計(jì)劃課題(2017YFC0703602)，北京市教委科技一般項(xiàng)目(KM201910016014)，北京未來城市設(shè)計(jì)高精尖創(chuàng)新中心(UDC2016030200)，市屬高校基本科研業(yè)務(wù)費(fèi)項(xiàng)目(X18128)，北京建筑大學(xué)研究生創(chuàng)新項(xiàng)目（PG2018030，PG2018025），長江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃資助(IRT_17R06)。

作者簡介：尹傳印，博士研究生，Email: ycybucea@163.com;通信作者：解琳琳，博士，副教授，Email: xielinlin@bucea.edu.cn。