【摘要】：基礎(chǔ)隔震技術(shù)是應(yīng)用較成熟的減震控制技術(shù)，國內(nèi)外對基礎(chǔ)隔震有廣泛的研究，但是對基礎(chǔ)隔震結(jié)構(gòu)扭轉(zhuǎn)減震系數(shù)和扭轉(zhuǎn)控制指標(biāo)方面的研究并不充分。論文通過在ETABS環(huán)境中建立典型工程三維模型對上述問題進(jìn)行了研究。 論文探討了基礎(chǔ)隔震結(jié)構(gòu)扭轉(zhuǎn)產(chǎn)生原因及研究現(xiàn)狀，指出了基礎(chǔ)隔震結(jié)構(gòu)扭轉(zhuǎn)研究的不足。第二章給出了論文研究所用隔震模型及分析軟件，并詳細(xì)闡述了論文研究采用的數(shù)值試驗(yàn)方案和全面試驗(yàn)設(shè)計(jì)方法。第三章以位移比作為結(jié)構(gòu)扭轉(zhuǎn)的指標(biāo)，對多遇及罕遇地震下基礎(chǔ)隔震結(jié)構(gòu)的扭轉(zhuǎn)效應(yīng)進(jìn)行對比分析，研究了地震烈度、上部結(jié)構(gòu)偏心率、隔震層偏心率以及其交互作用對結(jié)構(gòu)扭轉(zhuǎn)的影響。第四章通過對隔震與抗震模型結(jié)構(gòu)對比分析，，研究了基礎(chǔ)隔震結(jié)構(gòu)的平動減震率與扭轉(zhuǎn)減震率之間的關(guān)系，探討了不同隔震層偏心率的情況下宏觀減震效果可采用的反應(yīng)指標(biāo)。 研究表明：上部結(jié)構(gòu)偏心、隔震層偏心及兩者的交互作用對結(jié)構(gòu)的扭轉(zhuǎn)位移比有明顯的影響；隔震結(jié)構(gòu)上部偏心率小于0.06隔震層偏心率不大于0.04，則結(jié)構(gòu)位移比小于1.2；隔震層偏心率小于0.08，結(jié)構(gòu)位移比小于1.3。對結(jié)構(gòu)減震率的研究表明，當(dāng)隔震層的偏心率大于5%時(shí)，水平減震系數(shù)小于扭轉(zhuǎn)減震系數(shù)，此時(shí)基礎(chǔ)隔震結(jié)構(gòu)減震率應(yīng)考慮扭轉(zhuǎn)的影響，否則水平減震系數(shù)大于扭轉(zhuǎn)減震系數(shù)，宏觀減震效果評價(jià)可直接采用水平減震系數(shù)。
[Abstract]:Foundation isolation technology is a mature damping control technology. There is extensive research on foundation isolation at home and abroad, but the research on torsional damping coefficient and torsional control index of base-isolated structure is not sufficient. In this paper, three-dimensional model of typical engineering in ETABS environment is established to study the above problems. This paper discusses the cause of foundation isolated structure torsion and its research status, and points out the deficiency of foundation isolation structure torsion research. In the second chapter, the isolation model and analysis software are given, and the numerical test scheme and the overall test design method are described in detail. In chapter 3, taking the displacement ratio as the index of structural torsion, the torsional effect of base-isolated structure under rare and rare earthquakes is compared and analyzed, and the seismic intensity and eccentricity of superstructure are studied. The influence of eccentricity of isolation layer and its interaction on structural torsion. In chapter 4, by comparing and analyzing the isolation and seismic model structures, the relationship between the seismic damping rate and the torsional damping rate of the base-isolated structure is studied, and the response indexes of the macroscopic damping effect under the condition of different eccentricity ratio of the isolation layer are discussed. The results show that the eccentricity of the superstructure, the eccentricity of the isolation layer and the interaction of the two have obvious effects on the torsional displacement ratio of the structure. If the upper eccentricity ratio of isolated structure is less than 0.06, the displacement ratio of isolated structure is less than 1.2, and the eccentricity ratio of isolated layer is less than 0.08 and the displacement ratio of structure is less than 1.3. The results show that when the eccentricity of the isolation layer is greater than 5, the horizontal damping coefficient is smaller than the torsional damping coefficient, and the effect of torsion should be taken into account. Otherwise, the horizontal damping coefficient is larger than the torsional damping coefficient.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU352.12

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