本文選題：輕質(zhì)人字支撐抗震墻　切入點：抗震性能　出處：《鄭州大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：鋼筋混凝土抗震墻結(jié)構(gòu)具有較高的承載能力及抗側(cè)移剛度,被廣泛用于高層和超高層建筑,為了減少施工現(xiàn)場的環(huán)境及噪聲污染,近年來裝配式剪力墻結(jié)構(gòu)成為國內(nèi)外學(xué)者的研究重點。但是傳統(tǒng)裝配式剪力墻由于自重較大,給施工時吊裝及安裝帶來極大不便。因此,本課題組提出一種新型輕質(zhì)人字支撐抗震墻,即將實體RC剪力墻的墻體受力最小的部分用較小的截面斜撐代替,可以在一定程度上減輕構(gòu)件自重,減小地震作用。本文采用有限元程序OpenSees對其進(jìn)行數(shù)值模擬,研究其抗震性能,主要內(nèi)容為:首先,針對已有文獻(xiàn)中某實體鋼筋混凝土剪力墻試驗試件W-1,采用OpenSees軟件進(jìn)行水平低周反復(fù)荷載的數(shù)值模擬分析,和試驗結(jié)果比較表明,滯回曲線、骨架曲線及相關(guān)特征值均與試驗結(jié)果吻合良好,說明本文選取的有限元軟件OpenSees模型及其相關(guān)參數(shù)的準(zhǔn)確性。在此基礎(chǔ)上,進(jìn)一步選取某工程實例中的一片實體RC剪力墻進(jìn)行豎向荷載及水平低周反復(fù)荷載的數(shù)值模擬分析。分析工程實例中實體RC剪力墻的鋼筋應(yīng)力曲線,提出新型裝配式輕質(zhì)人字支撐抗震墻洞口的基本尺寸,然后進(jìn)一步研究不同洞口尺寸和RC支撐對其抗震性能的影響,在滿足與實體剪力墻相同的抗震性能基礎(chǔ)上,給出了洞口尺寸的取值范圍和合理的RC支撐。最后,研究考慮空間作用下高層裝配式輕質(zhì)人字支撐抗震墻的抗震性能,針對某實際高層框架剪力墻結(jié)構(gòu)的一個單元,利用有限元分析程序OpenSees建立整體結(jié)構(gòu)模型,將其中的實體剪力墻替換為本課題組所提出的新型輕質(zhì)人字支撐抗震墻,采用時程分析法,分別研究整體結(jié)構(gòu)為8和12層時,在不同地震設(shè)防水準(zhǔn)下結(jié)構(gòu)的動力響應(yīng),結(jié)果表明:采用本文提出的輕質(zhì)支撐抗震墻的結(jié)構(gòu)滿足同樣結(jié)構(gòu)采用實體剪力墻的性能目標(biāo)3,且輕質(zhì)支撐抗震墻在地震作用下,支撐首先屈服、然后才是抗震墻體屈服,因此,形成了多道抗震防線的結(jié)構(gòu)體系。
[Abstract]:Reinforced concrete anti-seismic wall structure has high bearing capacity and anti-lateral stiffness, so it is widely used in high-rise and super-high-rise buildings, in order to reduce the environment and noise pollution of the construction site. In recent years, assembly shear wall structure has become the research focus of scholars at home and abroad. However, the traditional assembly shear wall has brought great inconvenience to hoisting and installation during construction because of its heavy weight. Our group proposed a new type of lightweight herringbone braced seismic wall, that is, the part of the wall with the smallest force of solid RC shear wall can be replaced by small cross-section oblique braces, which can reduce the weight of the member to a certain extent. In order to reduce seismic action, the finite element program OpenSees is used to simulate the seismic behavior. The main contents are as follows: first of all, According to W-1 test specimen of a solid reinforced concrete shear wall, numerical simulation analysis of horizontal low cycle repeated load is carried out by using OpenSees software. Compared with the experimental results, the hysteretic curve is obtained. The skeleton curve and the related eigenvalues are in good agreement with the experimental results, which shows the accuracy of the finite element software OpenSees model and its related parameters. A solid RC shear wall in an engineering example is further selected for numerical simulation analysis of vertical load and horizontal low cycle repeated load, and the stress curve of steel bar of solid RC shear wall is analyzed. This paper presents the basic dimensions of the new fabricated lightweight herringbone bracing wall openings, and further studies the effects of different orifice sizes and RC braces on its seismic performance, on the basis of satisfying the same seismic performance as the solid shear walls. Finally, the aseismic performance of high-rise fabricated lightweight herringbone bracing wall under space is studied, and a unit of a practical high-rise frame shear wall structure is presented. The integral structure model is established by using finite element analysis program OpenSees, and the solid shear wall is replaced by the new lightweight herringbone braced seismic wall proposed by our team. The time history analysis method is used to study the whole structure with 8 and 12 stories, respectively. The dynamic response of the structure under different seismic fortification levels is obtained. The results show that the structure with lightweight braced seismic wall proposed in this paper meets the performance goal of the same structure with solid shear wall 3, and the lightweight braced seismic wall is subjected to seismic action. The braces yield first and then the seismic walls, so the structure system with multiple seismic lines is formed.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TU352.11

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本文編號：1643673