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周青¹，王偉^1,2，陳以一^1,2，童樂(lè)為^1,2，余亞超³，楊建行³，劉大偉⁴，古海賢二⁴

（1 同濟(jì)大學(xué)建筑工程系，上海 200092；2 同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室, 上海 200092；3 寶業(yè)集團(tuán)浙江建設(shè)產(chǎn)業(yè)研究院有限公司，紹興 312030；4 日本大和房屋工業(yè)株式會(huì)社，奈良 631-0801）

 

[摘要] 對(duì)2層4跨足尺結(jié)構(gòu)進(jìn)行了擬靜力加載試驗(yàn)，考察了分層裝配式支撐鋼結(jié)構(gòu)在水平地震作用下的抗側(cè)力機(jī)制、破壞模式與滯回特性，以及剛度和承載力的變化規(guī)律。試驗(yàn)結(jié)果表明，支撐是主要抗側(cè)力構(gòu)件，結(jié)構(gòu)彈性階段的抗側(cè)剛度幾乎完全由支撐提供，研制的新型支撐具有良好的延性工作性能。結(jié)構(gòu)體系在往復(fù)荷載下失效演進(jìn)過(guò)程表現(xiàn)為支撐受壓失穩(wěn)、支撐受拉屈服、柱腳截面部分屈服、節(jié)點(diǎn)處梁翼緣循環(huán)拉壓變形、柱腳端板連接焊縫開(kāi)裂和柱腳全截面屈服形成塑性鉸。改進(jìn)后的梁貫通式節(jié)點(diǎn)可以保證框架在塑性大變形階段分擔(dān)相當(dāng)比例的水平地震力，因而可作為該結(jié)構(gòu)的第2道防線。鑒于結(jié)構(gòu)體系耗能能力一般，抗震設(shè)計(jì)時(shí)可以考慮一定的地震作用放大系數(shù)。

[關(guān)鍵詞] 分層裝配；鋼結(jié)構(gòu)；工業(yè)化建筑；抗震性能；擬靜力試驗(yàn)

中圖分類(lèi)號(hào)：TU391文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2012)10-0061-04

 

Zhou Qing¹, Wang Wei^{1, 2}, Chen Yiyi ^{1, 2}, Tong Lewei^{1, 2}, Yu Yachao³, Yang Jianxing³, Liu Dawei⁴, Furumi Kenji⁴

(1 Department of Building Engineering, Tongji University, Shanghai 200092, China; 2 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; 3 Zhejiang Construction Industry Research Institute,Baoye Group, Shaoxing 312030, China; 4 Daiwa House Industry Co., Ltd., Nara City 631-0801, Japan)

 

Abstract: A quasi-static experiment was carried out on a full scale two-story by four-span structural system. Lateral force resisting mechanism, failure modes and hysteretic properties of the improved floor-by-floor assembled steel braced structure were investigated, as well as the evolution of the structural stiffness and strength under horizontal earthquake. Test results show that the braces are the primary members to resist the lateral load, the elastic lateral stiffness is exclusively provided by the braces. The developed new braces demonstrate good ductile behavior. The structural damage evolution under cyclic loading includes compression buckling and tension yielding of braces, partial yielding of column base, cyclic deformation of beam flange, weld cracking and plastic hinge formation at the column bases. The beam-column frame can participate in resisting horizontal seismic force under the conditions of large story drift due to the improved beam through connections. Thus, it can be viewed as the second defense of the structural system. It is recommended that a certain magnification factor for seismic action should be considered in the seismic design to compensate the low energy dissipation capacity.

Keywords: floor-by-floor assembling; steel structure; prefabricated building; seismic behavior; quasi-static test

*中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金。

通訊作者：王偉，博士，副教授，Email：weiwang@#edu.cn。

 

［1］王偉，陳以一，余亞超，等. 分層裝配式支撐鋼結(jié)構(gòu)工業(yè)化建筑體系［J］. 建筑結(jié)構(gòu)，2012，42(10)：48-52.

［2］劉大偉，王偉，馬場(chǎng)峰雄，等. 分層裝配式鋼結(jié)構(gòu)體系新型支撐研制與性能試驗(yàn)［J］. 建筑結(jié)構(gòu)，2012，42(10)：57-60,86.

［3］劉浩晉，王偉，陳以一，等. 分層裝配式支撐鋼結(jié)構(gòu)梁貫通式節(jié)點(diǎn)研制與性能試驗(yàn)研究［J］. 建筑結(jié)構(gòu)，2012，42(10)：53-56,101.

［4］ANSI/AISC 341-10. Seismic provisions for structural steel buildings［S］. Chicago(IL): American Institute of Steel Construction，2010.

［5］GB 50011—2010 建筑抗震設(shè)計(jì)規(guī)范［S］. 北京：中國(guó)建筑工業(yè)出版社，2010.