【摘要】：將三維隔震層從地面標高上移至巨-子結(jié)構(gòu)(巨型框架-子框架結(jié)構(gòu)體系)的各子結(jié)構(gòu)底部,可以解決高層三維隔震結(jié)構(gòu)搖擺反應(yīng)明顯的問題,且整體隔震結(jié)構(gòu)不再受高寬比限值的制約。設(shè)計加工了一個3層巨型框架結(jié)構(gòu)模型,底層大空間,上部含有2個次框架。在2個次框架底部與主框架樓板相連部位安裝4個三維隔震支座;進行了近斷層及遠場罕遇水平地震激勵下,巨-子抗震結(jié)構(gòu)和巨-子三維隔震結(jié)構(gòu)的地震模擬振動臺對比試驗和數(shù)值分析。結(jié)果表明:巨-子三維隔震結(jié)構(gòu)將隔震層上移至次框架底部并未延長結(jié)構(gòu)的基本周期。次框架和主框架的動力響應(yīng)減震效果顯著,近、遠場及場地類型對隔震率沒有明顯影響。由于近斷層地震動的脈沖效應(yīng)及其長周期成分與結(jié)構(gòu)周期更接近,近斷層激勵下次框架和主框架的動力響應(yīng)比相同場地的遠場地震動大10%~20%,Ⅲ類場地近斷層地震激勵下的結(jié)構(gòu)響應(yīng)比Ⅱ類場地大10%~25%。
[Abstract]:Moving the three dimensional isolation layer from the ground elevation to the bottom of each substructure of the mega-substructure (giant frame-sub-frame structure system) can solve the problem of the obvious rocking response of the high-rise three-dimensional isolated structure. And the whole isolated structure is no longer restricted by the limit value of aspect ratio. A three-story mega-frame structure model is designed and fabricated, with a large space at the bottom and two sub-frames in the upper part. Four three dimensional isolation supports are installed at the bottom of two subframes connected to the main frame floor. The seismic simulation shaking table tests and numerical analysis of the mega-sub-seismic structure and the mega-sub-3-D isolated structure under the excitation of near-fault and far-field rare horizontal earthquakes are carried out. The results show that moving the isolation layer up to the bottom of the secondary frame does not extend the basic period of the structure. The seismic response of the secondary frame and the main frame is remarkable, but the near, far field and site type have no obvious influence on the isolation rate. Because the pulse effect of near-fault earthquake and its long-period components are closer to the structural period, the dynamic response of the next frame and the main frame excited by the near fault is 10% and 20% larger than that of the far-field ground motion in the same site. The structural response of type 鈪，

本文編號：2415842