本文選題：橋墩 + 抗震延性　； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：橋墩在抗震工程應(yīng)用中允許在強烈地震作用下橋墩的特定部位出現(xiàn)塑性鉸，通過塑性鉸的耗能來抵抗地震作用。普通鋼筋混凝土橋墩塑性鉸通常難于提供所需的位移延性，本文探討鋼筋混凝土高架橋橋墩采用在潛在塑性鉸區(qū)域內(nèi)設(shè)置鋼骨提高抗震延性從而提高其安全性能，本文的工作如下： 1.依據(jù)箍筋約束混凝土和鋼骨內(nèi)核心混凝土的本構(gòu)模型和條件，以常見的墩柱截面形式為例，計算了矩形、圓形和矩形帶圓端形鋼骨混凝土截面的軸力和彎矩，編程繪制了常見截面的彎矩-曲率關(guān)系曲線，并證明了在塑性鉸區(qū)配置鋼骨可以有效提高截面的延性。 2.對影響延性的各參數(shù)進行分析，通過算例說明了各種參數(shù)對配圓鋼管的鋼骨混凝土曲線形式的影響，即各參數(shù)的的改變可以使配圓鋼管的鋼骨混凝土曲線表現(xiàn)出不同的形式；分析了各延性系數(shù)隨參數(shù)的變化規(guī)律，，給出了鋼骨混凝土設(shè)計中各種影響參數(shù)的范圍。 3.對橋墩實例進行了矩形橋墩塑性鉸區(qū)進行抗震性能分析。采用ANSYS有限元軟件建立描述材料特性的有限元模型，模擬墩柱在大震作用下的抗震性能；采用工業(yè)工程的分析方法得到塑性鉸區(qū)有鋼骨模型的位移延性系數(shù)和極限位移大于無鋼骨模型的，說明配置鋼骨可以提高塑性鉸抗震延性性能。
[Abstract]:In the application of seismic engineering, the piers are allowed to appear plastic hinge in the specific part of the pier under the strong earthquake, and the energy dissipation of the plastic hinge is used to resist the earthquake action. The plastic hinge of common reinforced concrete pier is usually difficult to provide the required displacement ductility. This paper discusses how to improve the seismic ductility of reinforced concrete viaduct pier by setting steel frame in the region of potential plastic hinge to improve its safety performance. The work of this paper is as follows: 1. Based on the constitutive model and conditions of confined concrete with stirrups and core concrete in steel bone, the axial forces and bending moments of rectangular, circular and rectangular circular end reinforced concrete sections are calculated by taking common section form of pier column as an example. The bending moment curvature curve of the common section is programmed and it is proved that the ductility of the section can be improved effectively by the placement of steel in the plastic hinge region. 2. The influence of the parameters on ductility is analyzed, and the influence of various parameters on the form of steel reinforced concrete curve of circular steel pipe is illustrated by an example, that is, the change of each parameter can make the steel reinforced concrete curve of circular steel pipe show different forms. The variation law of ductility coefficient with parameters is analyzed, and the range of influence parameters in steel reinforced concrete design is given. 3. The seismic behavior of plastic hinge region of rectangular pier is analyzed. ANSYS finite element software is used to establish the finite element model to describe the material characteristics and to simulate the seismic behavior of the pier column under the action of large earthquake. The ductility coefficient and limit displacement of the plastic hinged steel model are obtained by using the analysis method of industrial engineering. It is shown that the ductility of the plastic hinge can be improved by the placement of steel bone.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U442.55;U443.22

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