【摘要】：黏滯阻尼器耗能貢獻(xiàn)與速度響應(yīng)有關(guān),傳統(tǒng)靜力非線性分析方法(Pushover)由于無法反應(yīng)結(jié)構(gòu)瞬態(tài),故無法考慮黏滯阻尼器的貢獻(xiàn)。建議用性能點(diǎn)位移計(jì)算阻尼器貢獻(xiàn),并將其等效為結(jié)構(gòu)阻尼進(jìn)行結(jié)構(gòu)設(shè)計(jì)。通過反復(fù)迭代直至性能點(diǎn)處有效阻尼比數(shù)值穩(wěn)定,從而在Pushover中考慮黏滯阻尼器的貢獻(xiàn)。使用本方法可方便計(jì)算結(jié)構(gòu)在多遇地震下黏滯阻尼器的貢獻(xiàn),合理進(jìn)行設(shè)計(jì)反應(yīng)譜分析并評估結(jié)構(gòu)性態(tài),為復(fù)雜結(jié)構(gòu)方案設(shè)計(jì)定型和優(yōu)化提供一套有效方法。借鑒試驗(yàn)中常用的自由衰減振動測定結(jié)構(gòu)阻尼比的方法,使用數(shù)值加載方法進(jìn)行計(jì)算,所得的阻尼比與本文計(jì)算結(jié)果十分相近。按現(xiàn)行規(guī)范選取6條地震波,并按本文方法設(shè)定的黏滯阻尼器方案進(jìn)行的多遇地震下非線性動力時(shí)程分析表明,合理考慮黏滯阻尼器貢獻(xiàn),可能直接影響到結(jié)構(gòu)側(cè)移合格的結(jié)論。
[Abstract]:The energy dissipation contribution of viscous damper is related to the velocity response. The traditional static nonlinear analysis method (Pushover) can not consider the contribution of viscous damper because it can not respond to the transient of the structure. It is suggested that the damper contribution be calculated by the displacement of the performance point and be equivalent to the structural damping for structural design. The contribution of viscous dampers is considered in Pushover by iterating up to the numerical stability of effective damping ratio at the performance point. The method can be used to calculate the contribution of viscous dampers under frequent earthquakes, to analyze the design response spectrum and to evaluate the structural states, and to provide a set of effective methods for the design and optimization of complex structures. The damping ratio of the structure is calculated by using the method of free attenuation vibration, which is commonly used in the experiment, to calculate the damping ratio of the structure. The result is very close to the result of this paper. Six seismic waves are selected according to the current code, and the nonlinear dynamic history analysis under frequent earthquake is carried out according to the viscous damper scheme set by the method in this paper. The results show that the contribution of viscous damper is reasonably considered. It may directly affect the conclusion that the structure is qualified for lateral displacement.
【作者單位】： 北京工業(yè)大學(xué)城市與工程安全減災(zāi)省部共建教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：北京市自然科學(xué)基金資助項(xiàng)目(8141001)
【分類號】：TU352.1
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本文編號：2294786