發(fā)布時(shí)間：2018-01-10 05:03

  本文關(guān)鍵詞：預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁非線(xiàn)性有限元分析　出處：《東北石油大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： ABAQUS 本構(gòu)模型 滯回分析 高強(qiáng)混凝土 恢復(fù)力模型

【摘要】：鋼-混凝土組合梁通過(guò)混凝土與鋼材這兩種材料的有機(jī)組合，使組合結(jié)構(gòu)充分發(fā)揮混凝土的抗壓性能以及鋼材的抗拉性能，從而達(dá)到節(jié)約材料、提升經(jīng)濟(jì)效益的目的。預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁是在將高強(qiáng)混凝土應(yīng)用于鋼骨混凝土梁的基礎(chǔ)上，結(jié)合預(yù)應(yīng)力技術(shù)而形成的一種新型結(jié)構(gòu)。預(yù)應(yīng)力技術(shù)的使用可以降低梁的截面高度，節(jié)約了鋼材，同時(shí)也使造價(jià)降低；預(yù)應(yīng)力施加后可以調(diào)整結(jié)構(gòu)的內(nèi)力分布，增加組合梁彈性工作的范圍，延遲了組合梁屈服的時(shí)間，并且延緩了混凝土開(kāi)裂的時(shí)間，使組合梁的正常使用性能得到提升。在鋼骨高強(qiáng)混凝土梁的基礎(chǔ)上各方面的性能將更加優(yōu)越。 如今，鋼-混凝土組合結(jié)構(gòu)以其優(yōu)良性能得到廣泛應(yīng)用。國(guó)內(nèi)外在普通預(yù)應(yīng)力鋼骨混凝土構(gòu)件受力性能方面的研究較多，且對(duì)預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁研究則主要集中在單調(diào)靜力荷載作用下構(gòu)件的抗剪受力性能及抗彎受力性能分析方面，而在低周反復(fù)荷載作用下預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁的受力性能方面研究極少，且缺乏相關(guān)設(shè)計(jì)規(guī)范，使得預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁設(shè)計(jì)、施工缺乏強(qiáng)有力的理論支持。因此，進(jìn)行預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁的非線(xiàn)性分析是非常必要的。本文結(jié)合存在的問(wèn)題，開(kāi)展以下4方面的研究： 1.基于高強(qiáng)混凝土本構(gòu)模型，，利用ABAQUS軟件建立型鋼混凝土組合梁有限元模型，完成靜力加載分析，提出正確的有限元建模方法； 2.將靜力加載分析獲得的荷載-位移曲線(xiàn)與已有試驗(yàn)數(shù)據(jù)進(jìn)行對(duì)比，驗(yàn)證選取的本構(gòu)模型和建模方法的正確性。 3.改變預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁的部分參數(shù)，如梁的跨高比、混凝土的強(qiáng)度等級(jí)、H型鋼布置形式、體積配箍率、縱向鋼筋配筋率、預(yù)應(yīng)力大小等來(lái)研究各個(gè)因素對(duì)預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁在往復(fù)荷載作用下的性能影響，獲得上述參數(shù)對(duì)梁力學(xué)性能的影響規(guī)律。 4.基于滯回分析所獲得的荷載-位移曲線(xiàn)，引入截面型鋼剛度與截面總剛度之比系數(shù)，利用IstOpt軟件回歸得到預(yù)應(yīng)力鋼骨高強(qiáng)混凝土梁荷載-位移恢復(fù)力模型，為預(yù)應(yīng)力鋼骨高強(qiáng)混凝土框架結(jié)構(gòu)的彈塑性動(dòng)力分析提供參考依據(jù)。
[Abstract]:Through the organic combination of concrete and steel, steel-concrete composite beam can make the composite structure give full play to the compressive performance of concrete and the tensile property of steel, so that the material can be saved. The purpose of improving economic benefit is to apply high strength concrete to steel reinforced concrete beam. The application of prestress technology can reduce the cross section height of beam, save steel, and reduce the cost at the same time. The internal force distribution of the composite beam can be adjusted after the prestress is applied, the elastic working range of the composite beam can be increased, the yield time of the composite beam is delayed, and the time of concrete cracking is delayed. The normal service performance of composite beam is improved, and the performance of steel reinforced high strength concrete beam will be better than that of steel reinforced high strength concrete beam. Nowadays, steel-concrete composite structures are widely used for their excellent performance. There are many researches on the mechanical behavior of prestressed steel reinforced concrete members at home and abroad. The research on prestressed steel high strength concrete beams is mainly focused on the shear behavior and bending behavior analysis of the members under monotone static load. However, there is little research on the mechanical behavior of prestressed steel reinforced high-strength concrete beams under low cyclic cyclic loading, and the lack of relevant design specifications makes the design of prestressed high-strength steel reinforced concrete beams. Therefore, it is very necessary to carry out nonlinear analysis of prestressed steel reinforced high-strength concrete beam. In this paper, combining with the existing problems, the following four aspects of research are carried out: 1. Based on the constitutive model of high strength concrete, the finite element model of steel reinforced concrete composite beam is established by using ABAQUS software, the static loading analysis is completed, and the correct finite element modeling method is put forward. 2.Compared the load-displacement curve obtained by static load analysis with the existing experimental data, and verified the correctness of the selected constitutive model and modeling method. 3. Changing some parameters of prestressed steel high strength concrete beam, such as span height ratio of beam, strength grade of concrete and H-section steel layout, volume hoop ratio and longitudinal reinforcement ratio. The influence of various factors on the behavior of prestressed steel reinforced high-strength concrete beams under reciprocating load is studied, and the effects of the above parameters on the mechanical properties of the beams are obtained. 4. Based on the load-displacement curve obtained by hysteretic analysis, the ratio coefficient of section section stiffness to section total stiffness is introduced. The load-displacement restoring force model of prestressed steel reinforced high-strength concrete beam is obtained by IstOpt software regression, which provides a reference for elastic-plastic dynamic analysis of prestressed steel high strength concrete frame structure.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU398.9

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 計(jì)靜;套建增層預(yù)應(yīng)力鋼骨混凝土框架抗震性能與設(shè)計(jì)方法研究[D];哈爾濱工業(yè)大學(xué);2008年

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