钢筋混凝土柱—钢梁混合框架抗震性能及设计方法研究

发布时间：2018-05-13 02:45

本文选题：RCS混合框架中节点 + RCS混合框架　；参考：《西安建筑科技大学》2014年博士论文

【摘要】：钢筋混凝土柱-钢梁混合框架结构是钢与混凝土混合结构形式之一,它是由钢筋混凝土柱和钢梁组成的,简称RCS(Reinforced Concrete Columns and SteelBeams)。RCS混合框架结构综合了钢筋混凝土结构和钢结构各自的优点,充分利用材料的性能,是一种具有良好的抗震性能高性价比的结构形式。目前,国内外已对RCS混合框架结构进行了一些研究工作,我国对于RCS混合框架结构研究相对滞后,需要开展此方面的研究工作。本文通过试验研究、数值模拟和理论分析等手段,对RCS混合框架结构的抗震性能和设计方法进行研究。主要包括以下方面内容:本文设计了6个RCS混合框架中节点并进行了低周往复荷载试验,对不同构造措施下的RCS混合节点的破坏形态、承载力、强度刚度退化、滞回性能、延性和耗能进行了研究。RCS混合框架中节点常见的有三种破坏模式,即局压破坏、剪切破坏和承压破坏。本文通过ABAQUS有限元软件,对以上三种破坏形式节点进行了模拟分析,,并对影响这三种破坏形式的RCS混合框架中节点进行了参数分析。RCS混合框架中节点抗剪机理较为复杂,本文对影响RCS混合节点抗剪承载力的参数进行了分析,主要参数分别为节点核心区混凝土强度、钢梁腹板强度、轴压比、翼缘切除程度及配箍率等。假设节点核心区内外混凝土变形一致,提出了以钢腹板和混凝土斜压杆共同抗剪的机理,并根据抗剪机理得出RCS混合节点抗剪承载力公式,并对公式进行了验证。本文设计了1榀RCS混合框架的并进行了低周往复试验。对RCS混合框架的承载力、层间位移角、延性、强度刚度退化和耗能等进行了研究。研究表明RCS混合框架具有较好良好的抗震性能。通过ABAQUS有限元软件对RCS混合框架进行了受力机理分析,得出了RCS混合框架在各特征点下应力发展状态,明确了RCS混合框架的工作机理。通过Open SEES有限元软件,对RCS混合框架进行参数分析,进一步得出了各参数对RCS混合框架受力性能影响规律。本文介绍了钢筋混凝土框架和钢框架“强柱弱梁”设计方法,并对RCS混合框架“强柱弱梁”设计方法提出了相应的建议。以基于位移抗震设计的思想对RCS混合框架进行设计方法进行了研究。将RCS混合框架结构在地震作用下的性能水准划分为五档,与三个地震作用水准相结合,提出了三组结构性能目标。参考RCS混合框架试验,确定了RCS混合框架不同性能水平的量化指标。以一规则结构为例,说明基于位移抗震设计方法在RCS混合框架中的具体实施过程。
[Abstract]:The composite frame structure of reinforced concrete column and steel beam is one of the composite structures of steel and concrete, which is composed of reinforced concrete column and steel beam. RCS(Reinforced Concrete Columns and SteelBeams).RCS hybrid frame structure combines the advantages of reinforced concrete structure and steel structure, and makes full use of the properties of materials. It is a kind of structure with good seismic performance and high cost performance. At present, some research work has been done on the RCS hybrid frame structure at home and abroad, but the research on the RCS hybrid frame structure in our country is lagging behind, so it is necessary to carry out the research work in this field. In this paper, the seismic behavior and design method of RCS hybrid frame structures are studied by means of experimental research, numerical simulation and theoretical analysis. The main contents are as follows: in this paper, the joints of six RCS hybrid frames are designed and the low cycle reciprocating load tests are carried out. The failure patterns, bearing capacity, strength and stiffness degradation, hysteretic performance of RCS hybrid joints under different construction measures are studied. The ductility and energy dissipation of RCS hybrid frame are studied. There are three common failure modes of the joints, namely, partial pressure failure, shear failure and compression failure. In this paper, the ABAQUS finite element software is used to simulate and analyze the joints of the above three kinds of failure forms, and the parameters of the joints in the RCS hybrid frame which affect these three failure forms are analyzed. The shear mechanism of the joints in the RCS hybrid frame is more complex. In this paper, the parameters affecting the shear capacity of RCS hybrid joints are analyzed. The main parameters are the concrete strength in the core zone of the joints, the steel beam web strength, the axial compression ratio, the flange removal degree and the hoop ratio, etc. On the assumption that the deformation of concrete in and out of the core zone of the joint is the same, the shear resistance mechanism of steel web plate and concrete oblique compression bar is put forward. According to the shear mechanism, the shear bearing capacity formula of RCS hybrid joint is obtained, and the formula is verified. In this paper, a RCS hybrid frame is designed and the low cycle reciprocating test is carried out. The bearing capacity, interstory displacement angle, ductility, strength and stiffness degradation and energy dissipation of RCS hybrid frame are studied. The results show that the RCS hybrid frame has good seismic performance. The stress mechanism of RCS hybrid frame is analyzed by ABAQUS finite element software, and the stress development state of RCS hybrid frame under each characteristic point is obtained, and the working mechanism of RCS hybrid frame is clarified. Through the Open SEES finite element software, the parameter analysis of the RCS hybrid frame is carried out, and the influence of each parameter on the mechanical behavior of the RCS hybrid frame is obtained. This paper introduces the design method of "strong column and weak beam" for reinforced concrete frame and steel frame, and puts forward corresponding suggestions for the design method of "strong column weak beam" of RCS hybrid frame. The design method of RCS hybrid frame based on displacement seismic design is studied. The performance level of RCS hybrid frame structure under seismic action is divided into five stages and combined with three seismic action levels.Three groups of structural performance targets are proposed. Referring to the RCS hybrid frame test, the quantitative indexes of different performance levels of RCS hybrid frame are determined. Taking a regular structure as an example, the concrete implementation process of displacement-based seismic design method in RCS hybrid frame is illustrated.
【学位授予单位】：西安建筑科技大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU375;TU352.11

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