本文選題：Z形截面異形柱 + 正截面承載力��； 參考：《天津大學(xué)》2013年博士論文

【摘要】：混凝土異形柱框架結(jié)構(gòu)由于其在建筑布置中的優(yōu)越性而被廣泛地應(yīng)用于建筑設(shè)計(jì)中。但作為異形柱構(gòu)件基本截面形式之一的Z形截面柱卻沒有在異形柱規(guī)程中體現(xiàn)。本研究利用自編程序及ANSYS大型有限元程序?qū)形截面柱的正截面承載力、截面延性進(jìn)行全面分析，研究包括材料特性、截面尺寸以及加載方式等多方面因素對柱截面承載力及延性的影響。 本文用ANSYS大型有限元程序，研究Z形截面鋼筋混凝土柱在雙向偏心受壓的情況下，彈性范圍內(nèi)的截面變形協(xié)調(diào)性。通過對不同截面尺寸的Z形截面鋼筋混凝土柱進(jìn)行理論分析，表明Z形截面柱符合平截面假定，其柱截面正應(yīng)變分布等值線近似為直線。 利用自編正截面承載力分析程序，研究了Z形截面鋼筋混凝土柱在雙向偏心受壓的情況下，正截面承載力的變化情況。研究表明，，荷載角、軸壓比以及肢端配筋形式等均對正截面承載力有明顯影響，縱筋配筋率、縱筋強(qiáng)度和混凝土強(qiáng)度等級的增加都可以在一定程度上提高正截面的承載能力。在對不等肢Z形截面的研究中，根據(jù)不同的截面高寬比及肢高厚比確定了截面的最不利荷載角，且研究發(fā)現(xiàn)截面的高度和寬度的差值不宜過大否則容易造成截面在不同荷載角情況下極限承載力數(shù)值相差過大，出現(xiàn)明顯薄弱的受荷角度。 通過自編柱截面曲率延性計(jì)算程序，分析得到了Z形截面柱截面曲率延性比與多組構(gòu)件參數(shù)之間的內(nèi)在關(guān)系。分析表明荷載角、縱筋的設(shè)置和箍筋的設(shè)置都能對Z形截面柱曲率延性產(chǎn)生較大影響。混凝土強(qiáng)度與Z形截面柱的截面高寬比兩個參數(shù)對截面曲率延性影響相對較小。箍筋與縱筋的設(shè)置有一定的聯(lián)動關(guān)系，即箍筋間距與縱筋直徑的比值越小，越能提高Z形截面柱的延性。 根據(jù)梁鉸破壞機(jī)制研究了框架結(jié)構(gòu)的位移延性與異形柱柱截面曲率延性比的關(guān)系，得出不同抗震等級下異形柱所需的曲率延性比值。利用自編程序?qū)?5920種工況下的Z形截面柱進(jìn)行非線性分析，得到了與配箍特征值相關(guān)的軸壓比限值。
[Abstract]:Concrete special-shaped column frame structure is widely used in architectural design because of its superiority in building layout. However, as one of the basic sections of special-shaped columns, Z-shaped columns are not reflected in special-shaped columns. In this study, the normal section bearing capacity and section ductility of Z section column are analyzed comprehensively by using self-compiled program and ANSYS large finite element program. The research includes material characteristics. The influence of many factors, such as section size and loading mode, on the bearing capacity and ductility of columns. In this paper, the deformation compatibility of Z section reinforced concrete columns under biaxial eccentricity is studied by ANSYS program. Through the theoretical analysis of the reinforced concrete columns with different section sizes, it is shown that the Z section columns conform to the assumption of plane section, and the isoline of the normal strain distribution of the columns is approximately straight line. The variation of normal section bearing capacity of Z section reinforced concrete columns under biaxial eccentric compression is studied by using self-compiled program for normal section bearing capacity analysis. The results show that the load angle, axial compression ratio and the reinforcement form at the end of the limb have obvious influence on the bearing capacity of the normal section. The reinforcement ratio of the longitudinal reinforcement, the strength of the longitudinal reinforcement and the strength grade of the concrete can all increase the bearing capacity of the normal section to a certain extent. In the study of Z section of unequal limb, the most unfavorable load angle of section is determined according to different aspect ratio and height to thickness ratio. It is found that the difference between the height and width of the section should not be too large or it is easy to cause the difference of the ultimate bearing capacity of the section under different load angles. The internal relations between the curvature ductility ratio of Z section columns and the parameters of multiple components are analyzed by using a self-compiled program for calculating the curvature ductility of columns. The analysis shows that the load angle, the setting of longitudinal reinforcement and the setting of stirrups can greatly affect the curvature ductility of Z section columns. The ratio of concrete strength to section height to width of Z section column has little effect on the ductility of section curvature. There is a certain linkage between stirrups and longitudinal bars, that is, the smaller the ratio of stirrups spacing to the diameter of longitudinal bars, the more the ductility of Z-section columns can be improved. According to the failure mechanism of beam hinge, the relation between displacement ductility of frame structure and curvature ductility ratio of special-shaped column section is studied, and the ratio of curvature ductility required by special-shaped column under different seismic grade is obtained. In this paper, the nonlinear analysis of Z section columns under 25920 working conditions is carried out by using a self-programmed program, and the limit values of axial compression ratio related to the eigenvalues of the hoop are obtained.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2013
【分類號】：TU375.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 高丹盈,黃承逵,趙國藩;T形截面構(gòu)件截面曲率延性的簡化計(jì)算[J];四川建筑科學(xué)研究;1988年02期

2 陳偉;張新培;;鋼筋混凝土不等肢異形柱截面延性最不利荷載方向的研究[J];四川建筑科學(xué)研究;2006年01期

3 焦俊婷;刁波;葉英華;李淑春;;鋼筋混凝土Z形柱正截面承載力與延性[J];北京航空航天大學(xué)學(xué)報;2007年01期

4 申冬建,孟保艷,杜喜凱;鋼筋砼Z形截面偏心受壓柱的理論研究[J];河北農(nóng)業(yè)大學(xué)學(xué)報;2000年04期

5 曹萬林,王光遠(yuǎn),歐進(jìn)萍,魏文湘,吳建有;周期反復(fù)荷載作用下鋼筋混凝土十字形柱的性能[J];地震工程與工程振動;1994年03期

6 曹萬林,王光遠(yuǎn),吳建有,魏文湘;不同方向周期反復(fù)荷載作用下L形柱的性能[J];地震工程與工程振動;1995年01期

7 曹萬林,王光遠(yuǎn),魏文湘,吳建有;不同方向周期反復(fù)荷載作用下T形柱的性能[J];地震工程與工程振動;1995年04期

8 黃承逵,王丹,崔博;鋼筋混凝土異形柱軸壓比限值研究[J];大連理工大學(xué)學(xué)報;2002年02期

9 王滋軍,劉偉慶,蔣永生;鋼筋混凝土雙向偏心受壓L形截面柱正截面承載力的簡化計(jì)算[J];東南大學(xué)學(xué)報;1999年S1期

10 盧偉煌;鋼筋混凝土雙向偏心受力異形柱的計(jì)算研究[J];福建建筑;1997年04期

本文編號：2056243