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(湖南大學(xué)土木工程學(xué)院， 長沙 410082)
［摘要］從剛度的角度探討了建筑結(jié)構(gòu)能否采用隔震設(shè)計的問題，提出上部結(jié)構(gòu)抗側(cè)剛度與隔震層水平剛度的比值概念。進(jìn)行鋼框架模型激振試驗(yàn)，研究不同工況下的鋼框架模型的動力特征，對比分析不同剛度比和高寬比情況下的減震效果。結(jié)果表明：剛度比對結(jié)構(gòu)減震效果的影響比高寬比更為顯著，《建筑抗震設(shè)計規(guī)范》（GB 50011—2010）僅以高寬比作為結(jié)構(gòu)是否適合采用隔震技術(shù)的唯一判斷標(biāo)準(zhǔn)，其科學(xué)性值得進(jìn)一步研究；另外為達(dá)到隔震效果，結(jié)構(gòu)剛度比也存在最小限定值。
［關(guān)鍵詞］剛度比； 高寬比； 隔震墩； 振動臺試驗(yàn)； 減震效果； 隔震系數(shù)
中圖分類號：TU352文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)08-0106-04
Research on limit value of stiffness ratio for multi-level isolated structure
Shang Shouping， Xiao Cong
（College of Civil Engineering， Hunan University， Changsha 410082, China）
Abstract:From the point of view of stiffness, the isolation design of building structure was discussed and the concept of ratio for lateral resistant stiffness of the superstructure to the horizontal stiffness of the isolation layer was put forward. The dynamic characteristics of the steel frame model under different working conditions were studied based on the vibration test of steel frame model. Damping effects for structure with different stiffness ratios and aspect ratios were compared and analyzed. The results show that the influence of stiffness ratio on the structural damping effect is more significant than that of ratio. Code for seismic design of buildings (GB 50011—2010) only adopts height\|width ratio as the only criterion for whether the structure is suitable for using isolation technology, and its scientific worth needs further research. To achieve the effect of damping, structural stiffness ratio should be set the minimum limit value.
Keywords:stiffness ratio； height\|width ratio； isolated pier； shaking table test； damping effect； isolation coefficient
*國家十二五科技支撐項目（2011BAJ08800），湖南省重點(diǎn)項目（06sk4057）。
作者簡介：尚守平，教授,博士生導(dǎo)師，Email：sps@hnu.edu.cn。
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