本文選題：基礎(chǔ)隔震　切入點(diǎn)：位移相關(guān)摩擦阻尼器　出處：《武漢理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：目前基礎(chǔ)隔震在建筑抗震技術(shù)中已經(jīng)發(fā)展的較為成熟了,并且相應(yīng)標(biāo)準(zhǔn)和規(guī)范的出臺(tái)都標(biāo)志著隔震技術(shù)進(jìn)入了實(shí)用性的階段,但是,當(dāng)前大多數(shù)的基礎(chǔ)隔震研究都是針對(duì)常規(guī)地震記錄的,對(duì)近斷層地震記錄下基礎(chǔ)隔震的研究較少,考慮到位移相關(guān)摩擦阻尼器在橡膠隔震結(jié)構(gòu)應(yīng)用的空白,提出一種新型的摩擦阻尼器,通過(guò)理論分析與數(shù)值計(jì)算,研究了安裝該摩擦阻尼器的隔震結(jié)構(gòu)在不同類型地震作用下的抗震性能。本文的研究?jī)?nèi)容主要有以下三個(gè)方面:(1)本文首先提出了一種新型的位移相關(guān)摩擦阻尼器,并建立該阻尼器的力學(xué)模型,而橡膠隔震支座則采用了經(jīng)典的Bouc-Wen微分滯回模型,根據(jù)橡膠隔震支座與摩擦阻尼器的力學(xué)模型,建立了一個(gè)兩自由度體系的動(dòng)力方程,接著用諧波平衡法求出該方程在正弦波荷載作用下的解析解,再用經(jīng)典的Runge-Kutta法求出該方程的數(shù)值解,通過(guò)數(shù)值解來(lái)驗(yàn)證解析解的正確性。另外還研究摩擦阻尼器的三個(gè)參數(shù)(初始?jí)嚎s量、彈簧剛度、坡面夾角)變化時(shí),對(duì)方程解析解與數(shù)值解吻合效果的影響。最后用Runge-Kutta法計(jì)算出安裝了摩擦阻尼器的隔震結(jié)構(gòu)在常規(guī)強(qiáng)震記錄下的結(jié)構(gòu)響應(yīng)。(2)以一個(gè)安裝了隔震層的剪切型五層框架為例,建立安裝了摩擦阻尼器的隔震結(jié)構(gòu)的動(dòng)力方程,然后選取合適的地震波記錄(常規(guī)地震波、人工合成的近斷層脈沖型地震波、實(shí)際的近斷層脈沖型地震波),人工合成的地震波模擬方法是以常規(guī)地震波為底波,再用Dicleili的等效脈沖運(yùn)動(dòng)與底波進(jìn)行疊加。最后研究了有、無(wú)安裝了摩擦阻尼器的隔震結(jié)構(gòu)在各類地震作用下的地震響應(yīng),分析安裝了摩擦阻尼器之后結(jié)構(gòu)地震響應(yīng)的控制效果,數(shù)值計(jì)算結(jié)果表示安裝了摩擦阻尼器的隔震結(jié)構(gòu)對(duì)地震位移響應(yīng)的控制良好。(3)依舊以一個(gè)安裝了隔震層的五層框架為例,建立框架結(jié)構(gòu)的動(dòng)力方程。研究常規(guī)地震波與近斷層地震波分別作用時(shí)結(jié)構(gòu)地震能量時(shí)程曲線的區(qū)別,還研究了在常規(guī)地震波與真實(shí)的近斷層地震波作用下,有、無(wú)安裝摩擦阻尼器的隔震結(jié)構(gòu)在各類地震作用下的能量時(shí)程曲線,結(jié)果顯示,沒(méi)有安裝摩擦阻尼器時(shí),地震輸入的能量幾乎都是由橡膠隔震支座消耗掉的,而安裝了摩擦阻尼器之后,地震輸入的能量是由隔震支座與摩擦阻尼器共同消耗掉的,并且從側(cè)面證明了摩擦阻尼器對(duì)隔震結(jié)構(gòu)的位移響應(yīng)的控制良好。
[Abstract]:At present, the foundation isolation technology has been developed more mature in the building seismic technology, and the corresponding standards and specifications have indicated that the isolation technology has entered a practical stage, but, At present, most of the research on foundation isolation is aimed at conventional seismic records, but the research on foundation isolation under near-fault seismic records is less, considering the blank of the application of displacement-related friction dampers in rubber isolated structures. A new type of friction damper is proposed, which is theoretically analyzed and numerically calculated. In this paper, the seismic performance of the isolated structures with the friction dampers under different types of earthquakes is studied. The main contents of this paper are as follows: (1) in this paper, a new type of displacement-dependent friction dampers is proposed. The mechanical model of the damper is established, while the classical Bouc-Wen differential hysteresis model is used in the rubber isolation support. According to the mechanical model of the rubber isolation support and the friction damper, the dynamic equation of a two-degree-of-freedom system is established. Then the analytical solution of the equation under sine wave load is obtained by harmonic balance method, and the numerical solution of the equation is obtained by the classical Runge-Kutta method. The correctness of the analytical solution is verified by numerical solution. In addition, the variation of three parameters (initial compression, spring stiffness, angle between slope surface) of friction damper is also studied. Finally, using Runge-Kutta method to calculate the structural response of the isolated structure with friction dampers under the conventional strong earthquake record, taking a shear five-story frame with a isolation layer as an example, the effect on the agreement between the analytical solution of the equation and the numerical solution is obtained. The dynamic equations of isolated structures with friction dampers are established, and the appropriate seismic wave records (conventional seismic wave, synthetic near-fault pulse seismic wave) are selected. In the actual near-fault pulse type seismic wave, the synthetic seismic wave simulation method is to use conventional seismic wave as the base wave, and then use the equivalent pulse motion of Dicleili to stack with the bottom wave. The seismic response of isolated structures without friction dampers under various kinds of earthquake action is analyzed, and the control effect of seismic responses of structures with friction dampers is analyzed. The numerical results show that the seismic displacement response of the isolated structure with friction dampers is well controlled. The dynamic equation of frame structure is established. The difference of seismic energy time-history curve between conventional seismic wave and near-fault seismic wave is studied. In addition, under the action of conventional seismic wave and real near-fault seismic wave, there are, The energy time-history curves of the isolated structures without friction dampers under various kinds of earthquake action show that the energy input from the earthquake is almost consumed by the rubber isolation bearings when the friction dampers are not installed. After the friction damper is installed, the energy input from the earthquake is consumed by the isolation support and the friction damper, and it is proved from the side that the friction damper can control the displacement response of the isolated structure well.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU352.12

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