SRC异形柱框架—剪力墙结构抗震性能研究
发布时间：2018-12-06 17:09
【摘要】：相比于框架结构,剪力墙结构的最大的特点是抗侧刚度较大,能够减小水平荷载作用下结构的侧向位移,并且能够承担60%以上的总体剪力,剪力墙结构已在高层建筑中日益得到应用。型钢混凝土(SRC)异形柱结构在建筑上具有得房率高,便于家具摆放等显著优点,而且极大程度地改善了普通钢筋混凝土(RC)异形柱结构抗剪承载力低、抗震性能不足等缺陷,在工程应用上具有很大的发展潜力。将SRC异形柱框架与钢筋混凝土剪力墙进行组合,形成一种新的结构—SRC异形柱框架-剪力墙结构,能兼有SRC异形柱抗震延性好和剪力墙抗侧刚度较大的优势,目前对此类结构的研究还处于探索阶段。本文以SRC异形柱框架剪力墙为研究对象,首先基于Opensees在构件层次上进行静力弹塑性分析(Pushover分析)和滞回性能分析,然后制作了相同尺寸及配筋的试件进行抗震性能试验,最后以20层整体结构为对象,进行多模态的Pushover分析(MPA),具体内容如下:(1)对SRC异形柱框架结构和RC异形柱框架剪力墙结构的国内外研究动态进行了阐述,对剪力墙结构的抗震性能进行了论述,并提出了一些可能需要进一步研究的问题。(2)以一榀带SRC异形边框柱剪力墙为研究对象,并以相同尺寸建立了一榀普通的钢筋混凝土剪力墙,使用Opensees有限元软件对两种剪力墙进行了Pushover分析和滞回性能分析,重点分析抗剪承载力、位移延性系数、耗能能力和刚度退化等抗震性能指标,进一步对带SRC异形边框柱剪力墙进行了变参数分析,研究了轴压比、混凝土强度、型钢屈服强度等因素对混合剪力墙抗震性能的影响规律。(3)制作一榀带SRC异形边框柱剪力墙试件,通过试验深入研究这种结构在水平荷载作用下的的破坏机理。对该试件进行单向推覆加载,观察混合剪力墙的裂缝发展和破坏情况,研究该混合剪力墙随着位移增大,试件承载力和刚度的变化情况,分析该混合剪力墙的延性和位移角是否符合抗震设计的要求。(4)对20层的SRC异形柱框架-剪力墙平面结构进行有限元分析,利用MPA方法,根据性能点对应的结构层间位移角大小验证结构的抗震性能满足要求,通过改变混凝土强度改变剪力墙的刚度比,研究对该类框剪结构抗震性能的影响规律。
[Abstract]:Compared with the frame structure, the biggest characteristic of the shear wall structure is that the lateral stiffness is larger, the lateral displacement of the structure can be reduced under horizontal load, and the overall shear force can be more than 60%. Shear wall structure has been increasingly used in high-rise buildings. The steel reinforced concrete (SRC) special-shaped column structure has the advantages of high building yield and convenient furniture arrangement, and greatly improves the low shear capacity of the ordinary reinforced concrete (RC) special-shaped column structure. Lack of seismic performance and other defects have great development potential in engineering applications. The SRC special-shaped column frame and reinforced concrete shear wall are combined to form a new kind of structure-SRC special-shaped column frame-shear wall structure, which has the advantages of good seismic ductility of SRC special-shaped column and great lateral stiffness of shear wall. At present, the study of this kind of structure is still in the exploratory stage. In this paper, SRC special-shaped column frame shear wall is taken as the research object. Static elastic-plastic analysis (Pushover) and hysteretic performance analysis are carried out on the basis of Opensees at the member level, and then the specimens of the same size and reinforcement are made for seismic performance test. Finally, taking the 20-story whole structure as the object, the concrete contents of the multi-modal Pushover analysis of (MPA), are as follows: (1) the domestic and foreign research trends of SRC special-shaped column frame structure and RC special-shaped column frame shear wall structure are expounded. The seismic behavior of shear wall structure is discussed, and some problems that may need further study are put forward. (2) taking a SRC special-shaped frame column shear wall as an object of study, A common reinforced concrete shear wall is established with the same size. The Pushover analysis and hysteretic performance analysis of two kinds of shear walls are carried out by using Opensees finite element software, and the shear bearing capacity and displacement ductility coefficient are analyzed emphatically. Based on the seismic performance indexes such as energy dissipation capacity and stiffness degradation, the variable parameter analysis of shear wall with SRC special-shaped frame column is carried out, and the axial compression ratio and concrete strength are studied. The influence of yield strength of steel on the seismic behavior of mixed shear wall. (3) A specimen of shear wall with SRC special-shaped frame column is made, and the failure mechanism of the structure under horizontal load is studied deeply through experiments. The specimen was subjected to unidirectional push-over loading to observe the crack development and failure of the mixed shear wall, and to study the variation of the bearing capacity and stiffness of the composite shear wall with the increase of displacement. The ductility and displacement angle of the hybrid shear wall are analyzed whether it meets the requirements of seismic design. (4) finite element analysis of 20-story SRC special-shaped column frame-shear wall plane structure is carried out, and the MPA method is used. According to the inter-story displacement angle corresponding to the performance point to verify the seismic performance of the structure meets the requirements, by changing the concrete strength to change the stiffness ratio of the shear wall, the influence law on the seismic performance of this kind of frame-shear structure is studied.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU398.2;TU352.11
本文编号：2366367
[Abstract]:Compared with the frame structure, the biggest characteristic of the shear wall structure is that the lateral stiffness is larger, the lateral displacement of the structure can be reduced under horizontal load, and the overall shear force can be more than 60%. Shear wall structure has been increasingly used in high-rise buildings. The steel reinforced concrete (SRC) special-shaped column structure has the advantages of high building yield and convenient furniture arrangement, and greatly improves the low shear capacity of the ordinary reinforced concrete (RC) special-shaped column structure. Lack of seismic performance and other defects have great development potential in engineering applications. The SRC special-shaped column frame and reinforced concrete shear wall are combined to form a new kind of structure-SRC special-shaped column frame-shear wall structure, which has the advantages of good seismic ductility of SRC special-shaped column and great lateral stiffness of shear wall. At present, the study of this kind of structure is still in the exploratory stage. In this paper, SRC special-shaped column frame shear wall is taken as the research object. Static elastic-plastic analysis (Pushover) and hysteretic performance analysis are carried out on the basis of Opensees at the member level, and then the specimens of the same size and reinforcement are made for seismic performance test. Finally, taking the 20-story whole structure as the object, the concrete contents of the multi-modal Pushover analysis of (MPA), are as follows: (1) the domestic and foreign research trends of SRC special-shaped column frame structure and RC special-shaped column frame shear wall structure are expounded. The seismic behavior of shear wall structure is discussed, and some problems that may need further study are put forward. (2) taking a SRC special-shaped frame column shear wall as an object of study, A common reinforced concrete shear wall is established with the same size. The Pushover analysis and hysteretic performance analysis of two kinds of shear walls are carried out by using Opensees finite element software, and the shear bearing capacity and displacement ductility coefficient are analyzed emphatically. Based on the seismic performance indexes such as energy dissipation capacity and stiffness degradation, the variable parameter analysis of shear wall with SRC special-shaped frame column is carried out, and the axial compression ratio and concrete strength are studied. The influence of yield strength of steel on the seismic behavior of mixed shear wall. (3) A specimen of shear wall with SRC special-shaped frame column is made, and the failure mechanism of the structure under horizontal load is studied deeply through experiments. The specimen was subjected to unidirectional push-over loading to observe the crack development and failure of the mixed shear wall, and to study the variation of the bearing capacity and stiffness of the composite shear wall with the increase of displacement. The ductility and displacement angle of the hybrid shear wall are analyzed whether it meets the requirements of seismic design. (4) finite element analysis of 20-story SRC special-shaped column frame-shear wall plane structure is carried out, and the MPA method is used. According to the inter-story displacement angle corresponding to the performance point to verify the seismic performance of the structure meets the requirements, by changing the concrete strength to change the stiffness ratio of the shear wall, the influence law on the seismic performance of this kind of frame-shear structure is studied.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU398.2;TU352.11
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