预制剪力墙结构强水平缝弱竖缝结构性能研究

发布时间：2018-04-21 23:23

本文选题：预制剪力墙 + 强水平缝弱竖缝　；参考：《华北理工大学》2017年硕士论文

【摘要】：随着我国城市化进程的不断发展,城市住宅的需求数量和质量与日俱增,与当前我国广泛应用的现浇混凝土结构相比,装配式剪力墙结构具有诸多显著优点。预制剪力墙结构中存有各种形式的接缝,接缝的连接方式和特点关系到结构的抗震性能和整体性。为解决预制剪力墙结构中接缝的连接问题,使预制剪力墙结构得到更多的推广应用,满足剪力墙结构设计的理念,提高结构延性,提出“强水平缝弱竖缝”的设计理念,并利用新型预制-现浇组合钢筋混凝土楼板的设计实现强水平缝,利用金属阻尼器等耗能装置实现弱竖向缝。采用一幢20层装配式混凝土结构模型,应用有限元软件SAP2000,分别建立现浇混凝土剪力墙结构模型,设置竖向接缝的剪力墙模型,以及安装不同参数的金属阻尼器剪力墙模型。选取了五条地震波(El centro波,唐山-北京饭店南北向地震波,迁安波,兰州波1,上海人工波5),分别对上述模型在八度设防烈度时多遇地震和罕遇地震情况下进行时程分析,比较不同模型结构的最大层间位移角。通过研究五组地震波的反应分析可知,当剪力墙竖向接缝宽度为300 mm~500 mm范围时,在多遇地震和罕遇地震条件下,设置金属阻尼器的预制剪力墙结构能够取得显著的减震效果。多遇地震与罕遇地震情况下,通过比较各楼层的最大层间位移角,发现减震效率一般在20%~70%左右,这时减震效果较好。当阻尼器初始刚度及屈服点取适当较高的值时,有明显的减震效果。位移型阻尼器在小震时基本处于弹性状态,为结构提供刚度;在大震时则处于屈服状态,具备较好的耗能能力。在预制墙的竖向接缝内设置金属(软钢)阻尼器,可以减小在地震作用下结构的层间位移角及具有耗能作用。因此,在预制墙的竖向接缝内设置金属阻尼器是可行的。
[Abstract]:With the development of urbanization in our country, the quantity and quality of urban housing are increasing day by day. Compared with the cast-in-place concrete structure widely used in our country, the prefabricated shear wall structure has many remarkable advantages. There are various kinds of joints in prefabricated shear wall structures. The connection mode and characteristics of the joints are related to the seismic performance and integrity of the structure. In order to solve the joint connection problem in precast shear wall structure, make the precast shear wall structure get more popularization and application, satisfy the design idea of shear wall structure, improve the ductility of the structure, put forward the design idea of "strong horizontal joint weak vertical joint". A new type of precast and cast-in-situ composite reinforced concrete floor slab is designed to realize the strong horizontal joint and the weak vertical joint is realized by the energy dissipation device such as metal damper. Using a 20-story assembled concrete structure model and finite element software SAP2000, the structural model of cast-in-place concrete shear wall, the shear wall model with vertical joint and the shear wall model of metal damper with different parameters are established respectively. Five seismic waves, El centro wave, Tangshan-Beijing Hotel seismic wave, Qian'an wave, Lanzhou wave 1 and Shanghai artificial wave 5, are selected. The time-history analysis of the above model is carried out under octave intensity frequent earthquakes and rare earthquakes, respectively. The maximum interstory displacement angle of different model structures is compared. The response analysis of five sets of seismic waves shows that when the width of vertical joint of shear wall is 300 mm~500 / mm, the prefabricated shear wall structure with metal damper can achieve remarkable seismic absorption effect under the condition of frequent earthquake and rare earthquake. In the case of frequent earthquakes and rare earthquakes, by comparing the maximum interstory displacement angles of each floor, it is found that the damping efficiency is generally about 20% or 70%, and the damping effect is better. When the initial stiffness and yield point of the damper are properly high, the damping effect is obvious. The displacement-type dampers are basically in the elastic state during small earthquakes, which provide stiffness for the structure, and are in the yield state for large earthquakes, so they have better energy dissipation capacity. A metal (mild steel) damper is installed in the vertical joint of the precast wall, which can reduce the interstory displacement angle and the energy dissipation of the structure under earthquake. Therefore, it is feasible to install a metal damper in the vertical joint of the precast wall.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.16

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