本文選題：土 + 高層建筑群　； 參考：《地震工程與工程振動》2017年05期

【摘要】：城市建筑越高越密集的發(fā)展趨勢,對土-高層建筑群的相互作用分析提出了新的理論課題。本文以Davidenkov地基模型作為本構(gòu)模型,并運用振動臺實驗實測數(shù)據(jù)驗證該本構(gòu)模型模擬黏性土動力響應(yīng)的準(zhǔn)確性。在此基礎(chǔ)上,運用ANSYS建立土與建筑群動力相互作用的有限元模型,上部結(jié)構(gòu)設(shè)計為框架結(jié)構(gòu),分析土與高層建筑群的動力相互作用對上部結(jié)構(gòu)動力響應(yīng)的影響,并與單體建筑進行對比。然后改變模型參數(shù),分析上部結(jié)構(gòu)間距和上部結(jié)構(gòu)數(shù)量對建筑群動力響應(yīng)的影響。計算表明,在土-建筑群相互作用體系中,群效應(yīng)對上部結(jié)構(gòu)的動力響應(yīng)有影響,群效應(yīng)使得群內(nèi)建筑三層以上樓層的絕對加速度峰值、速度峰值都減小,并且平行于震動方向以及中間建筑受群效應(yīng)影響更為明顯;同時,在三層以上時,隨著間距的增大,群效應(yīng)越來越小,隨著上部結(jié)構(gòu)的增多,群效應(yīng)越來越大,但上部建筑不同的布置方位也可能導(dǎo)致不同的結(jié)果。
[Abstract]:The higher the urban buildings, the denser the urban buildings are, a new theoretical subject is put forward for the analysis of the interaction between soil and high-rise buildings. In this paper, the Davidenkov foundation model is used as the constitutive model, and the accuracy of the constitutive model in simulating the dynamic response of clay is verified by the measured data of shaking table experiment. On this basis, the finite element model of the dynamic interaction between soil and buildings is established by using ANSYS. The superstructure is designed as a frame structure, and the influence of the dynamic interaction between soil and high-rise buildings on the dynamic response of the superstructure is analyzed. And compared with the single building. Then the influence of superstructure spacing and superstructure quantity on the dynamic response of the building group is analyzed by changing the model parameters. The results show that in the soil-building interaction system, the group effect has an effect on the dynamic response of the superstructure, and the group effect causes the peak absolute acceleration and the peak velocity of the building above the three floors in the group to decrease. At the same time, when the space increases, the group effect becomes smaller and smaller, and the group effect increases with the increase of the superstructure. However, different location of upper buildings may also lead to different results.
【作者單位】： 能源工程安全與災(zāi)害力學(xué)教育部重點實驗室四川大學(xué)建筑與環(huán)境學(xué)院;
【基金】：土木工程防災(zāi)國家重點實驗室開放課題基金項目(SLDRCE10-MB-05)~~
【分類號】：TU435;TU973.15

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