【摘要】：自復(fù)位結(jié)構(gòu)是一種利用后張預(yù)應(yīng)力筋和節(jié)點耗能裝置來組裝預(yù)制構(gòu)件的一種新型結(jié)構(gòu)形式,作為一種特別處理的裝配式結(jié)構(gòu),鋼筋混凝土自復(fù)位結(jié)構(gòu)具有施工簡單、抗震性能好、殘余變形小、震后易修復(fù)等特點。雖然在國內(nèi)尚處于理論研究階段,但在美國和新西蘭等國家已經(jīng)有相關(guān)規(guī)范出臺,并有了工程應(yīng)用。研究對象是鋼筋混凝土自復(fù)位混凝土框架結(jié)構(gòu),研究內(nèi)容主要分為三個方面。首先,通過對鋼筋混凝土自復(fù)位梁進行試驗研究,研究自復(fù)位梁的內(nèi)力重分布及其豎向荷載作用下的承載力;利用ABAQUS有限元軟件對鋼筋混凝土自復(fù)位梁進行有限元分析,研究影響自復(fù)位梁內(nèi)力重分布和承載力的因素。其次,對鋼筋混凝土自復(fù)位節(jié)點在水平往復(fù)荷載作用下進行有限元研究,分析節(jié)點耗能能力及水平承載力。最后,通過對一榀框架在地震作用下的時程分析,研究自復(fù)位框架在不同軸壓比、不同地震強度下的破壞形態(tài),比較結(jié)構(gòu)破壞時的層間位移角。研究表明,在梁柱結(jié)合面配筋適當(dāng)?shù)那闆r下,鋼筋混凝土自復(fù)梁與傳統(tǒng)現(xiàn)澆連續(xù)梁具有相同水平的豎向承載力,自復(fù)位梁節(jié)點具有良好的延性。自復(fù)位梁節(jié)點塑性的發(fā)展主要受特設(shè)鋼筋影響;提高特設(shè)鋼筋彎矩貢獻比能夠有效地改善節(jié)點耗能能力;自復(fù)位結(jié)構(gòu)具有良好的變形恢復(fù)能力。在地震作用下,自復(fù)位結(jié)構(gòu)的彈性及彈塑性層間位移限值均比傳統(tǒng)現(xiàn)澆結(jié)構(gòu)要大。
[Abstract]:Self-reset structure is a new type of structure which uses post-tensioned tendons and joint energy dissipation devices to assemble prefabricated members. As a specially treated prefabricated structure, reinforced concrete self-reset structure has simple construction. Good seismic performance, small residual deformation, easy to repair after the earthquake and so on. Although it is still in the stage of theoretical research in our country, it has been issued in some countries such as the United States and New Zealand, and has been applied in engineering. The research object is reinforced concrete self-reset concrete frame structure, which is mainly divided into three aspects. First of all, the internal force redistribution and the bearing capacity under vertical load of the self-reset RC beam are studied through the experimental research on the self-reset RC beam, and the finite element analysis of the self-reset RC beam is carried out by using Abaqus finite element software. The factors influencing the internal force redistribution and bearing capacity of the self-reset beam are studied. Secondly, the finite element analysis of reinforced concrete self-reset joints under horizontal reciprocating load is carried out to analyze the energy dissipation capacity and horizontal bearing capacity of the joints. Finally, through the time-history analysis of a frame subjected to earthquake, the failure patterns of self-reset frame under different axial compression ratios and different earthquake intensities are studied, and the interstory displacement angles are compared. The results show that the reinforced concrete self-composite beam has the same vertical bearing capacity as the traditional cast-in-place continuous beam, and the self-reset joint has good ductility. The plastic development of self-reset beam joints is mainly affected by special reinforcement; improving the contribution ratio of special reinforcement moment can effectively improve the energy dissipation capacity of the joints; and the self-reset structure has good deformation recovery ability. The elastic and elastic-plastic displacements of the self-reset structures are larger than those of the traditional cast-in-place structures under earthquake.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU352.11;TU375.4

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