本文選題：高層建筑 + 基礎(chǔ)隔震　； 參考：《建筑結(jié)構(gòu)學報》2017年07期

【摘要】：西昌(9度區(qū))某高層基礎(chǔ)隔震結(jié)構(gòu),其上部為框架-核心筒結(jié)構(gòu),總高度為58.3 m(不計入隔震層),隔震層采用鉛芯橡膠隔震支座。為研究該隔震結(jié)構(gòu)的抗震性能及檢驗帶抗拉裝置隔震支座的有效性,進行了縮尺比為1/15模型的模擬地震振動臺試驗。結(jié)果表明,隔震層降低了上部結(jié)構(gòu)的加速度反應,隔震層上加速度放大系數(shù)小于0.5,可滿足抗震設(shè)防烈度降低一度的設(shè)計目標;隔震結(jié)構(gòu)的位移集中在隔震層,上部結(jié)構(gòu)的層間位移較小,層間位移角滿足規(guī)范層間位移角限值要求;隔震層力-位移滯回曲線較為飽滿,具有良好的耗能能力。罕遇地震作用下,支座出現(xiàn)拉應力,說明隔震結(jié)構(gòu)在高烈度地震作用下存在傾覆的可能性。對角部隔震支座加裝抗拉裝置后,再次進行振動臺試驗,結(jié)果表明,抗拉裝置不會對結(jié)構(gòu)水平向動力特性及支座在正常受壓狀態(tài)下的豎向運動和水平向運動產(chǎn)生顯著影響,通過對比證明了其在隔震支座受拉情況下提供的有效抗拉作用。
[Abstract]:The upper part of the structure is frame-core tube structure, the total height is 58.3 m (excluding the isolation layer, the isolation layer adopts lead-core rubber isolation support. In order to study the seismic performance of the isolated structure and to test the validity of the isolation bearing with tensile device, the shaking table test was carried out with the scale ratio of 1 / 15 model. The results show that the isolation layer reduces the acceleration response of the superstructure, and the acceleration magnification factor on the isolation layer is less than 0.5, which can meet the design goal of reducing the seismic fortification intensity by one degree, and the displacement of the isolated structure is concentrated in the isolation layer. The interstory displacement of the superstructure is small, the interstory displacement angle meets the limit requirement of the standard interstory displacement angle, and the hysteresis curve of seismic isolation layer is full and has good energy dissipation ability. Under the action of rare earthquake, tensile stress appears in the bearing, which indicates the possibility of overturning the isolated structure under the action of high intensity earthquake. After adding tensile device to the angle isolation support, the shaking table test is carried out again. The results show that the tensile device has no significant effect on the horizontal dynamic characteristics of the structure and the vertical and horizontal motion of the bearing under normal compression. It is proved by comparison that its effective tensile action is provided in the case of isolation bearing under tension.
【作者單位】： 同濟大學土木工程防災國家重點實驗室;中船第九設(shè)計研究院工程有限公司;
【基金】：國家自然科學基金項目(51322803)
【分類號】：TU973

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本文編號：1809279