鋼筋瀝青隔震結(jié)構(gòu)隔震效果的影響因素研究
尚守平，易春榮
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（湖南大學(xué)土木工程學(xué)院， 長沙 410082）
［摘要］介紹了鋼筋瀝青隔震層設(shè)計時應(yīng)滿足的條件，并利用時程分析法中的Newmark-β法分析了地震動峰值、隔震層阻尼以及隔震層剛度等因素對鋼筋瀝青隔震結(jié)構(gòu)隔震效果的影響。在實驗室進行了鋼框架模型振動臺試驗，研究上部鋼框架等效抗側(cè)剛度與隔震層抗側(cè)剛度之比對隔震效果的影響。結(jié)果表明，各種工況下的鋼框架等效抗側(cè)剛度與隔震層抗側(cè)剛度之比對隔震效果影響顯著；當(dāng)抗側(cè)剛度比達到一定值時鋼筋瀝青隔震結(jié)構(gòu)可以達到較好的隔震效果。這也證明鋼筋瀝青隔震技術(shù)是非常實用的隔震技術(shù)，所研究的結(jié)果可為編制有關(guān)規(guī)程提供參考。［關(guān)鍵詞］鋼筋瀝青隔震技術(shù); Newmark-β法; 剛度比; 振動臺試驗; 隔震效果中圖分類號：TU352.12 文獻標(biāo)識碼：A 文章編號：1002-848X(2016)11-0091-05
Study on influencing factors on isolation effect of steelasphalt isolated structureShang Shouping, Yi Chunrong（College of Civil Engineering, Hunan University, Changsha 410082, China）Abstract: The conditions to meet in steel-asphalt isolation layer design were introduced, and the Newmark-β method of time-history analysis method was used to analyze the influences of seismic vibration peak, isolation layer damping and isolation layer stiffness factors on isolation effect of steel-asphalt isolated structure. The shaking table test on steel frame model was carried out in the laboratory to study the effect of the ratio of equivalent lateral stiffness of the upper steel frame to the lateral stiffness of the isolation layer on the seismic isolation effect. Results show that under various working conditions, the ratio of equivalent lateral stiffness of the upper steel frame to the lateral stiffness of the isolation layer has significant effect on the seismic isolation; when the lateral stiffness ratio reaches a certain value, steel-asphalt isolation structure can achieve well seismic isolation effect. It also proves that steel-asphalt isolation technology is very practical. The results of the study can provide a reference for the preparation of the relevant specifications.Keywords: steel-asphalt isolation technology; Newmark-β method; stiffness ratio; shaking table test; isolating effect
作者簡介：尚守平，博士，教授，Email：sps@hnu.edu.cn。
