高强混凝土内置钢板剪力墙的抗震性能研究

发布时间：2018-08-01 16:47

【摘要】：超高层建筑在我国的应用越来越多，超高层建筑通常利用剪力墙或剪力墙组成的筒体来抵抗侧向力。为保证混凝土剪力墙的延性要求，若混凝土等级采用C60以下普通混凝土，墙厚会过厚，还需要采用较高的配钢率来满足轴压比的要求，，给设计、施工带来较大难度。因此需要利用高强混凝土组合结构来满足现在超高层建筑的需求。本文利用钢结构和钢筋混凝土结构的优点，设计并试验了一种C80高强混凝土内置钢板组合剪力墙，通过试验研究结合有限元模拟进行了探讨，本文的研究工作主要包括：（1）设计制作了试验参数为：内置钢板配钢率、剪力墙墙身厚度、端柱钢板配钢率、剪力墙墙身配筋率的11个C80高强混凝土内置钢板组合剪力墙试件，通过低周往复荷载加载，研究该组合剪力墙在低周往复荷载作用下的抗震性能。（2）对试验结果进行详尽的分析，从试件的破坏形态、滞回曲线、骨架曲线、钢板和钢筋的应变、延性系数、刚度和强度退化、能量耗散能力等方面对试验结果进行分析。结果表明：各个试件最终破坏形态均是底部墙体的钢板受压发生屈曲，混凝土被压碎，呈现出压弯破坏的特征。随着内置钢板配钢率的增大，C80高强混凝土内置钢板组合剪力墙的承载力提高明显、但延性以及变形能力提高缓慢。墙身厚度以及边缘构件对组合剪力墙的性能影响较大，能够明显的提高C80高强混凝土内置钢板组合剪力墙的承载力、耗能能力、延性以及使得刚度退化缓慢。墙身配筋率的大小对试件的延性、耗能能力和承载力等性能的影响不明显。指出了C80高强混凝土内置钢板组合剪力墙是一种具有良好抗震性能的组合剪力墙。（3）利用有限元分析软件ABAQUS对试验试件进行了有限元分析，分析结果和试验结果吻合良好。在此基础上利用有限元软件进一步分析了内置钢板配钢率、剪力墙墙身厚度、端柱钢板配钢率、剪力墙墙身配筋率等各个参数对组合剪力墙的性能的影响。（4）在参数分析基础上，对C80高强混凝土内置钢板组合剪力墙的设计中若干问题进行了分析研究，分析了该组合剪力墙的几种限制条件，同时给出了实际工程中对该类型组合剪力墙的设计建议。
[Abstract]:Super high-rise buildings are more and more widely used in our country. Shear walls or shear walls are usually used to resist lateral forces in super high-rise buildings. In order to ensure the ductility requirement of concrete shear wall, if the concrete grade is ordinary concrete below C60, the wall thickness will be too thick, and the high steel ratio should be adopted to meet the requirement of axial compression ratio, which will bring great difficulty to design and construction. Therefore, it is necessary to use high-strength concrete composite structure to meet the needs of high-rise buildings. Based on the advantages of steel structure and reinforced concrete structure, a kind of C80 high strength concrete composite shear wall with steel plate is designed and tested. The main research work of this paper is as follows: (1) the test parameters are as follows: the ratio of steel distribution of built-in steel plate, the thickness of shear wall, the steel distribution ratio of end column steel plate, The shear wall specimens with the reinforcement ratio of 11 C80 high strength concrete embedded steel composite shear wall specimens are loaded under low cycle reciprocating loads. The seismic behavior of the composite shear wall under low cyclic reciprocating load is studied. (2) the test results are analyzed in detail, including the failure form, hysteretic curve, skeleton curve, strain and ductility coefficient of steel plate and steel bar. The experimental results are analyzed from the aspects of stiffness and strength degradation, energy dissipation ability and so on. The results show that the ultimate failure pattern of each specimen is the buckling of the steel plate at the bottom of the wall and the crushing of concrete, showing the characteristics of compression and bending failure. The bearing capacity of C80 high strength concrete composite shear wall increases obviously, but the ductility and deformability increase slowly with the increase of steel plate ratio. The thickness of the wall body and the edge member have great influence on the performance of the composite shear wall, which can obviously improve the bearing capacity, energy dissipation capacity, ductility and stiffness degradation of the C80 high strength concrete composite shear wall. The effect of reinforcement ratio on ductility, energy dissipation and bearing capacity is not obvious. It is pointed out that C80 high strength concrete composite shear wall with steel plate is a kind of composite shear wall with good seismic performance. (3) finite element analysis of test specimens is carried out by using finite element analysis software ABAQUS. The analytical results are in good agreement with the experimental results. On the basis of this, the steel distribution ratio of built-in steel plate, the thickness of shear wall body and the steel distribution ratio of end column steel plate are further analyzed by using finite element software. The influence of various parameters, such as reinforcement ratio of shear wall body, on the performance of composite shear wall. (4) on the basis of parameter analysis, some problems in the design of C80 high strength concrete inner steel composite shear wall are analyzed and studied. Several limiting conditions of the composite shear wall are analyzed, and the design suggestions for this type of composite shear wall in practical engineering are given.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398;TU352.11

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