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（中國(guó)建筑設(shè)計(jì)研究院，北京 100044）

[摘要]  伸臂桁架在框架-核心筒結(jié)構(gòu)的抗震設(shè)計(jì)中主要用于增加結(jié)構(gòu)的抗側(cè)剛度，但由于其豎向剛度的不規(guī)則容易成為結(jié)構(gòu)的薄弱環(huán)節(jié)。屈曲約束支撐結(jié)構(gòu)布置靈活，是一種優(yōu)良的耗能減震構(gòu)件。本文結(jié)合該類結(jié)構(gòu)在水平荷載下的變形特點(diǎn)將屈曲約束支撐設(shè)置于外柱和伸臂桁架之間，利用其滯回耗能及結(jié)構(gòu)體系的變形特點(diǎn)實(shí)現(xiàn)耗能減震控制，同時(shí)結(jié)合工程實(shí)例利用平面模型對(duì)該減震方案和原方案進(jìn)行IDA分析和PUSHOVER分析，研究結(jié)果表明，該減震方案改善了整體結(jié)構(gòu)抗震性能，利于損傷可控和多道設(shè)防目的的實(shí)現(xiàn)。

[關(guān)鍵字]  屈曲約束支撐;伸臂桁架;剛度突變;減震設(shè)計(jì);IDA分析;PUSHOVER分析

中圖分類號(hào)：TU973.3+1      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X（2013）S1-1176-07

作者簡(jiǎn)介：鄧仲良，碩士，工程師，Email: dengzl@cadg.cn。

Research on the seismic reduction design of frame-core structure with the outrigger

Deng Zhongliang, Fan Zhong, Hu Chunyang

(China Architectural Design & Research Group, Beijing, 100044, China)

Abstract: Outriggers were applied widely to increase the lateral stiffness for a seismic design of frame-core structures, however, incidental irregular vertical stiffness may induce vulnerable damage. Buckling-restrained braces(BRB) have flexible structural arrangement, while they’re also excellent energy dissipation structural components. The BRB is set as a link member between the exterior column and the outrigger in this paper, which incorporates the structural deformation pattern under the lateral load with hysteretic energy dissipation for seismic reduction control. Furthermore, combined with a practical project, IDA analysis and PUSHOVER analysis are applied to analyze the seismic reduction effect, study results show that the proposal improves overall structural aseismic properties, which is also beneficial for damage control and multi-defense realization of earthquake-resistant.

Keywords: buckling-restrained braces; outriggers; stiffness break; seismic reduction design; IDA; Pushover