带混合暗支撑的钢筋混凝土双室筒体力学性能研究

发布时间：2018-07-01 11:26

  本文选题：钢筋混凝土核心筒 + 混合暗支撑　； 参考：《湖南大学》2015年硕士论文

【摘要】：钢筋混凝土核心筒因初始刚度大、承载力大、延性好、良好的空间和整体受力性能,是高层和超高层建筑的主要抗侧力构件,在实际工程中得到了非常广泛的应用。而带混合暗支撑的钢筋混凝土核心筒是在普通混凝土核心筒的一种新型改进形式,通过在普通核心筒墙内加入型钢暗支撑以大幅度的提高核心筒的初始刚度、承载力、延性和变形性能,但目前对其的研究和应用还不是很成熟,因此加强对带混合暗支撑核心筒力学性能的研究既是发展高层及超高层建筑的需要,也具有十分重大的工程意义。目前学术界对核心筒的理论和试验研究主要是针对于单室筒体,而在实际工程中应用非常普遍的长方形双室筒体的研究还比较少,针对于这一现状本文的主要的研究内容为带混合暗支撑双室筒体相关的力学性能。剪力滞后效应是钢筋混凝土核心筒的一个非常重要的受力特征,剪力滞后效应的存在使得核心筒的整体受力性能下降,材料的性能得不到充分的发挥,同时也使得截面的设计偏于不安全。因而加强对核心筒剪力滞后效应的研究是充分了解筒体受力性能,优化高层建筑结构设计的必然要求。基于计算机技术和有限元研究领域飞速发展的时代背景,本文运用ABAQUS有限元软件对不同条件下的双室筒体进行了大量的数值模拟和参数分析。本论文以带混合暗支撑双室筒体、X形钢筋暗支撑双室筒体以及普通双室筒体为主要的研究对象,着重研究了在不同构造和荷载加载条件下核心筒的剪力滞后效应、承载力、变形性能、刚度变化、抗震性能等力学性能,并对其结果进行了比较和理论分析。本文完成的以下的主要内容:(1)本文通过运用ABAQUS有限元软件模拟了有关文献的试验模型,分析和讨论了ABAQUS的建模方法、参数设置、材料本构、单元类型的选择和网格类型划分的方法。通过模拟结果和试验结果的对比及结果参数误差原因的分析,有效的证明了运用ABAQUS能够比较准确地模拟钢筋混凝土核心的力学性能,并在有关文献的基础上建立本文钢筋混凝土的双室筒体有限元模型。(2)对不同构造条件和加载条件的钢筋混凝土核心筒进行了数值模拟,通过提取各模型底部翼缘截面纵向应变计算结果来对核心筒的剪力滞后效应进行研究。为了能够使核心筒的建立滞后效应进行量化以对不同模型的剪力滞后效应进行比较,本文定义的“剪力滞值”为翼缘截面的最大纵向应变与平均纵向应变之差和平均纵向应变的比值,并通过“剪力滞值”的大小来衡量核心筒翼缘纵向应变的不均匀程度。本文主要研究了双室筒体在水平荷载作用下,其剪力滞后效应的表现形式及、分布特点以及变化规律,探讨了核心筒的暗支撑形式、轴压比、连梁跨高比、墙肢型钢暗支撑构造形式和数量以及连梁钢板等因素对双室筒体剪力滞后效应的影响。(3)对比了不同构造和加载条件下单室和双室钢筋混凝土核心筒的抗震性能。主要研究了带混合暗支撑双室筒体、X形钢筋暗支撑双室筒体以及普通双室筒体在不同情况下的力-位移曲线、延性、抗震参数特征点及刚度退化曲线,以进一步研究暗支撑形式、轴压比、连梁跨高比、墙肢型钢暗支撑构造形式和数量、水平荷载加载方向及连梁钢板等因素对核心筒抗震性能的影响,研究结果证明在双室筒体中加入暗支撑特别是型钢暗支撑能够大幅度提高核心筒的整体受力性能和抗震性能。(4)本文重点研究了钢筋混凝土单室筒体和双室筒体剪力滞后效应与抗震性能两者之间的关系,其研究结果表明降低核心筒的剪力滞后效应能够改善核心筒的力学性能,提高核心筒的整体性和抗震性能。
[Abstract]:Reinforced concrete core tube, with large initial stiffness, large bearing capacity, good ductility, good spatial and overall mechanical properties, is the main anti lateral component of high-rise and super high rise buildings. It has been widely used in practical engineering, and the reinforced concrete core tube with mixed dark support is a new type of concrete core tube. In order to improve the initial stiffness, bearing capacity, ductility and deformability of the core barrel, the research and application of the core tube are not very mature at present. Therefore, it is necessary to strengthen the research on the mechanical energy of the core tube with the mixed dark support, which is the need for the development of high rise and super high rise buildings. The theoretical and Experimental Research on the core tube in the academic circle is mainly aimed at the single chamber cylinder, and the research on the rectangular double chamber tube which is widely used in the actual engineering is still relatively few. The main research content in this paper is the correlation of the double chamber tube with mixed dark support. The shear lag effect is a very important stress characteristic of the reinforced concrete core tube. The existence of the shear lag effect reduces the overall stress performance of the core tube, the performance of the material can not be fully played, and the design of the cross section is unsafe. Therefore, the shear lag effect of the core tube is strengthened. The research is a necessary requirement to fully understand the force performance of the cylinder and optimize the design of the high-rise building structure. Based on the time background of the rapid development of the computer technology and the finite element research field, this paper uses the ABAQUS finite element software to carry out a large number of numerical simulation and parameter Analysis on the double chamber tube under different conditions. This paper is based on the mixed dark branch. The main research object is the double chamber barrel, the X shaped double chamber tube and the ordinary double chamber cylinder. The shear lag effect, the bearing capacity, the deformation performance, the stiffness change and the seismic performance of the core tube under different structure and load loading conditions are emphatically studied, and the results are compared and analyzed in theory. The following main contents are as follows: (1) this paper simulates the experimental model of relevant literature by using ABAQUS finite element software, analyzes and discusses ABAQUS modeling method, parameter setting, material constitutive, element type selection and grid type division method. It is proved that the mechanical properties of reinforced concrete core can be simulated accurately by using ABAQUS, and on the basis of relevant documents, the finite element model of double chamber tube in this paper is set up on the basis of relevant documents. (2) numerical simulation of the core tube of reinforced concrete with different structural conditions and loading conditions is carried out through the extraction of each model. The shear lag effect of the core barrel is studied by the longitudinal strain calculation results of the section of the bottom flange section. In order to quantify the lag effect of the establishment of the core tube to compare the shear lag effect of the different models, the "shear lag value" defined in this paper is the difference between the maximum longitudinal strain and the mean longitudinal strain of the flange section. The ratio of the average longitudinal strain and the size of the shear lag value are used to measure the uneven degree of the longitudinal strain of the flange of the core barrel. In this paper, the expressions of the shear lag effect, the distribution characteristics and the variation rules of the double chamber tube under horizontal load are mainly studied, and the dark support form and the axial compression ratio of the core barrel are discussed. The influence of the span height ratio of continuous beam, the form and quantity of the dark bracing structure of the wall limb steel and the continuous beam steel plate on the shear lag effect of the double chamber tube. (3) the seismic performance of the single chamber and double room reinforced concrete core barrel under different structures and loading conditions is compared. The main research is the double chamber tube with mixed dark support and a X shaped steel reinforced dark braced double chamber tube. The force displacement curve, the ductility, the seismic parameter characteristic point and the stiffness degradation curve of the ordinary double chamber tube under different conditions are used to further study the influence of the dark support form, the axial pressure ratio, the span height ratio of the continuous beam, the form and quantity of the dark bracing structure of the wall limb steel, the influence of the horizontal load loading square and the continuous beam steel plate on the seismic performance of the core tube. The results show that the addition of dark support to the double chamber tube, especially the steel dark support, can greatly improve the overall mechanical performance and seismic performance of the core tube. (4) this paper focuses on the relationship between the shear lag effect and the seismic performance of the reinforced concrete single chamber tube and the double chamber tube, and the results show that the core is reduced to the core. The shear lag effect of the tube can improve the mechanical properties of the core tube and improve the integrity and seismic performance of the core tube.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.17

【参考文献】

中国期刊全文数据库 前10条

1 曹启坤;关健;刘书贤;麻凤海;;矿井井塔剪力滞后效应影响因素分析[J];广西大学学报(自然科学版);2013年03期

2 聂建国;王宇航;;ABAQUS中混凝土本构模型用于模拟结构静力行为的比较研究[J];工程力学;2013年04期

3 郭明;;混凝土塑性损伤模型损伤因子研究及其应用[J];土木工程与管理学报;2011年03期

4 张战廷;刘宇锋;;ABAQUS中的混凝土塑性损伤模型[J];建筑结构;2011年S2期

5 周忠发;赵均;;混凝土核心筒的有限元模拟及若干参数的影响分析[J];防灾减灾工程学报;2010年06期

6 王强;冯帆;张帆;安立刚;;基于通用有限元软件ABAQUS的子结构拟动力试验研究[J];土木工程学报;2010年S1期

7 彭小婕;于安林;方有珍;;混凝土损伤塑性模型的参数分析[J];苏州科技学院学报(工程技术版);2010年03期

8 刘劲松;刘红军;;ABAQUS钢筋混凝土有限元分析[J];装备制造技术;2009年06期

9 林旭川;陆新征;缪志伟;叶列平;郁银泉;申林;;基于分层壳单元的RC核心筒结构有限元分析和工程应用[J];土木工程学报;2009年03期

10 贾鹏;杜修力;赵均;;不同轴压比钢筋混凝土核心筒抗震性能[J];北京工业大学学报;2009年01期

中国博士学位论文全文数据库 前2条

1 李祚华;高层钢筋混凝土结构损伤模型及地震损伤描述[D];哈尔滨工业大学;2010年

2 黄选明;带暗支撑短肢剪力墙及筒体结构抗震性能试验及理论研究[D];北京工业大学;2005年

中国硕士学位论文全文数据库 前5条

1 王会涛;带混合暗支撑的钢筋混凝土核心筒剪力滞后效应分析[D];湖南大学;2013年

2 信瑛佩;考虑剪力滞后的复杂截面剪力墙配筋研究[D];哈尔滨工业大学;2011年

3 李江波;高层钢筋混凝土结构ABAQUS参数化建模方法[D];哈尔滨工业大学;2011年

4 高雁;筒体结构剪力滞后效应研究及其简化分析[D];重庆大学;2006年

5 马心俐;框筒结构剪力滞后效应分析的样条函数方法[D];广西大学;2005年

，

本文编号：2087633