防落梁油阻尼器參數(shù)優(yōu)化設(shè)計(jì)及工程應(yīng)用研究
[Abstract]:Under the action of strong earthquake, the displacement and falling beam of simply supported and continuous bridge superstructures are the main damage forms. If the displacement of beam can be reduced by mechanical limiting and increasing damping, both the collision between the beam and the block can be prevented, and the beam fall can be prevented, the damage of the bridge will be significantly reduced. Therefore, a new oil damper with mechanical limit and damping is developed. The authors have reviewed the relevant literatures of oil dampers in recent years, and have understood the research progress and engineering applications in this field. Under the guidance of the principle of "energy consumption through the small mouth", two types of oil dampers (FZ1 and FZ2) are designed. By means of a special device for damper parameter testing, the influence of the through oil hole mode and the area of the through oil hole on the relationship between the force and velocity of the oil damper is discussed. The main achievements are as follows. 1. Summarized and combed the domestic and foreign literature about the research and application of oil damper, deeply understood the working principle, design method and manufacturing technology of oil damper; 2. Two kinds of oil dampers are designed. The first type is a bypass through oil type (FZ1). By manually adjusting the throttle valve to change the net cross section of the oil orifice, the influence of the pore section on the relationship between the force and velocity of the oil damper is explored. The second is piston perforation (FZ2). Through the combination of different cross sections and different number of piston holes, the influence of the net cross section of the oil hole on the relationship between the force and velocity of the oil damper is discussed. 3. Using domestic actuators and American MTS actuators, pseudo-static tests of the two kinds of oil dampers were carried out under various possible working conditions on a special testing device for horizontal dampers, and the force-velocity relationship curves of each condition were obtained. According to the experimental results, the optimal combination of the dampers through the oil holes is discussed, and the train of thought for the optimal design is pointed out. 4. Based on the measured parameters of oil dampers, the seismic responses of bridges with oil dampers are discussed. The results show that the seismic capacity of simply supported or continuous beam bridges can be significantly improved by setting oil dampers.
【學(xué)位授予單位】:防災(zāi)科技學(xué)院
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類(lèi)號(hào)】:TU352.1
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