【摘要】：由于建筑結(jié)構(gòu)形式的不斷多樣化,高強度鋼材和高強度(高性能)混凝土出現(xiàn),使預(yù)應(yīng)力混凝土的應(yīng)用日益廣泛。預(yù)應(yīng)力混凝土量能夠滿足現(xiàn)代建筑不斷向大跨度、輕型、高性能方向發(fā)展的要求。本文采用midas civil軟件建立了預(yù)應(yīng)力混凝土結(jié)構(gòu)模型,進(jìn)行了理論和數(shù)值模擬分析,主要完成了以下幾個方面工作：首先,介紹預(yù)應(yīng)力混凝土梁理論知識,主要內(nèi)容包括：預(yù)應(yīng)力混凝土梁受力特點；預(yù)應(yīng)力混凝土梁預(yù)應(yīng)力損失；預(yù)應(yīng)力混凝土梁正截面承載力計算；預(yù)應(yīng)力混凝土梁反拱度計算。然后,建立后張法有粘結(jié)預(yù)應(yīng)力混凝土框架結(jié)構(gòu)有限元模型,在其施加預(yù)應(yīng)力荷載過程中,對其預(yù)應(yīng)力混凝土梁的變形、豎向支撐體系變形進(jìn)行了詳細(xì)分析,得出該結(jié)構(gòu)在施加預(yù)應(yīng)力過程中,預(yù)應(yīng)力混凝土梁的起拱值達(dá)到了設(shè)計要求,有效的控制了大跨度預(yù)應(yīng)力梁的裂縫開展；另外對豎向支撐體系選取結(jié)構(gòu)二層部分柱頂點進(jìn)行分析,得出了柱頂節(jié)點按照施工過程張拉預(yù)應(yīng)力梁時的變形規(guī)律。接著對后張法有粘結(jié)預(yù)應(yīng)力混凝土框架結(jié)構(gòu)進(jìn)行抗震分析,先選取預(yù)應(yīng)力梁所在層的梁柱節(jié)點,觀察其節(jié)點位移變化。得出在地震作用下,含預(yù)應(yīng)力梁的相關(guān)節(jié)點處都較容易發(fā)生破壞；又改變預(yù)應(yīng)力梁中預(yù)應(yīng)力值,分析了預(yù)應(yīng)力度對結(jié)構(gòu)整體層位移變化以及含預(yù)應(yīng)力梁的局部一榀框架的影響；最后,建立了有粘結(jié)、無粘結(jié)預(yù)應(yīng)力混個凝土框架結(jié)構(gòu)有限元模型,對兩種結(jié)構(gòu)的整體以及含預(yù)應(yīng)力梁的局部一榀框架進(jìn)行抗震性能對比分析。得出有粘結(jié)預(yù)應(yīng)力混凝土結(jié)構(gòu)的抗震性能比無粘結(jié)的好。
[Abstract]:The application of prestressed concrete is becoming more and more extensive due to the diversification of building structure and the appearance of high strength steel and high strength (high performance) concrete. The quantity of prestressed concrete can meet the requirements of the development of modern buildings in the direction of long span, light weight and high performance. In this paper, the model of prestressed concrete structure is established by using midas civil software, and the theoretical and numerical simulation analysis is carried out. The main work is as follows: firstly, the theoretical knowledge of prestressed concrete beam is introduced. The main contents include: prestressing characteristics of prestressed concrete beam, prestressing loss of prestressed concrete beam, calculation of bearing capacity of normal section of prestressed concrete beam and calculation of inverse arch degree of prestressed concrete beam. Then, the finite element model of post-Zhang Fa bonded prestressed concrete frame structure is established, and the deformation of prestressed concrete beam and vertical bracing system are analyzed in detail during the process of prestressing load. It is concluded that the arched value of prestressed concrete beam meets the design requirements in the process of applying prestressing force and effectively controls the crack development of long-span prestressed beam. In addition, the vertical support system is analyzed to select the roof point of the two-story column, and the deformation law of the column top joint is obtained when the prestressed beam is tensioned according to the construction process. Then seismic analysis of post-Zhang Fa prestressed concrete frame structure is carried out. It is concluded that the relative joints of prestressed beams are liable to damage under earthquake, and the prestressing value of prestressed beams is changed, and the influence of prestress degree on the displacement of the whole story of the structure and a local frame with prestressed beams is analyzed. Finally, the finite element model of bonded and unbonded prestressed concrete frame structure is established, and the seismic behavior of the two structures and a local frame with prestressed beam are compared and analyzed. It is concluded that the seismic behavior of bonded prestressed concrete structure is better than that of unbonded prestressed concrete structure.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU378.4

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本文編號：2215028