- 摘 要
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(1 東南大學(xué)土木工程學(xué)院， 南京 210096； 2 東南大學(xué)城市與建筑遺產(chǎn)保護(hù)教育部重點實驗室， 南京 210096)
［摘要］對六朵宋式斗栱及一攢清式斗栱足尺模型進(jìn)行了低周反復(fù)荷載試驗研究。由試驗結(jié)果可以看出，斗栱像球形鉸一樣具有較好的轉(zhuǎn)動能力，而且層間滑移現(xiàn)象并不明顯。大部分斗栱模型發(fā)生了斗底的脫榫或折榫破壞，而上部構(gòu)件的整體性較好，基本未發(fā)生破壞。試驗得出了斗栱的滯回曲線、骨架曲線，由于里跳和外跳不對稱，所以橫向加載時的滯回曲線不對稱。還探討了不同形制及鋪作數(shù)對斗栱抗震性能的影響，宋式斗栱橫向的抗側(cè)剛度和水平承載力略大于縱向的，且隨著出跳數(shù)增加而減??；清式斗栱由于尺寸較小，抗側(cè)剛度和承載力均較小。
［關(guān)鍵詞］斗栱; 低周反復(fù)荷載; 不同鋪作數(shù); 抗震性能
中圖分類號：TU366 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2014)09-0079-04
Experimental study of low-cycle loading test on Song-style and Qing-style dougong
Shao Yun1, Qiu Hongxing1, Yue Zhi2, Chun Qing2
(1 School of Civil Engineering, Southeast University, Nanjing 210096, China; 2 Key Lab of Urban & Architectural Heritage Conservation, Ministry of Education, Southeast University, Nanjing 210096, China)
Abstract: Experimental study was carried out on low-cycle loading test of seven full-scale dougong models, including six Song-style dougong models and one Qing-style dougong model. Results show that dougong has well rotation capacity as spherical hinges, which seldom slip interfacial. Most dougong models failed due to pulled out or broken of nethermost tenon, while the upper members worked as a whole and hardly got broken. The hysteretic curves and skeleton curves of these models were obtained. Due to asymmetry of inside and outside parts of dougong, hysteretic curves under horizontal loads were asymmetrical. The influence of different forms and layers of dougong on its seismic performance was also discussed. The lateral stiffness and load-bearing capacity of Song-style dougong, which decreased as the layers of dougong increased, were slightly larger when under horizontal loads than under vertical loads. Lateral stiffness and load-bearing capacity of Qing-style dougong were small due to its small size.
Keywords: dougong; low-cycle loading; different layer; seismic performance
*國家自然科學(xué)基金重點項目（51138002），國家十二五科技支撐項目（2012BAJ14B02）。
作者簡介：邵云，碩士研究生，Email: ggp8711@163.com。
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