摇摆填充墙—框架结构抗震性能研究

发布时间：2018-07-17 05:50

【摘要】：钢筋混凝土框架结构在地震作用下容易出现层间屈服破坏现象,现行抗震设计要求“强柱弱梁”,在工程实践中往往难以实现,针对这种情况,国内外学者提出了摇摆墙-框架结构体系,能够协调框架的各楼层变形,避免形成变形集中。同时,填充墙作为一种非结构构件,其均匀布置时对主体结构的整体刚度、承载能力等均产生有利影响,但对结构的延性有所降低。本文在对摇摆墙-框架结构研究的基础上,结合填充墙框架结构体系,提出一种新型结构形式,即摇摆填充墙-框架结构体系。通过SAP2000和ABAQUS有限元软件进行数值模拟研究,以一个六层框架结构为算例,采用Pushover分析方法,对比纯框架、普通填充墙-框架和摇摆填充墙-框架结构的抗震性能,验证了摇摆填充墙实现的可行性,分析了摇摆填充墙的“摇摆”特点。采用动力时程分析方法,着重研究了摇摆填充墙-框架结构在动力状况下墙体的“摇摆”特点,并对比分析了摇摆填充墙-框架和纯框架的自振周期、位移响应、滞回特性以及耗能能力。研究结果表明:在水平地震作用较小时,摇摆填充墙与普通填充墙发挥作用相同,当地震作用达到一定强度时,该部分填充墙起到摇摆墙的作用;摇摆填充墙的加入,对于框架结构的自振周期影响并不大;摇摆填充墙能够改变并均匀结构层间变形分布,使框架的破坏机制变为整体型破坏,有效提高了结构的延性性能;摇摆后的填充墙墙体内力小于普通填充墙,破坏时间晚于普通填充墙,墙体的摇摆增大了结构的刚体位移,相应的减小了弹塑性位移;摇摆填充墙-框架结构在静力和动力模拟分析中均具备良好的抗震性能。
[Abstract]:Reinforced concrete frame structure is prone to the phenomenon of interstory yield failure under earthquake action. The current seismic design requires "strong column and weak beam", which is often difficult to realize in engineering practice. Domestic and foreign scholars put forward rocking wall-frame structure system, which can coordinate the deformation of each floor of the frame and avoid forming deformation concentration. At the same time, as a kind of non-structural member, the infilled wall has a favorable effect on the overall stiffness and bearing capacity of the main structure when it is uniformly arranged, but it reduces the ductility of the structure. Based on the research of rocking wall-frame structure and combined with the infilled wall frame structure system, a new type of structure form is proposed in this paper, that is, rock-filled wall-frame structure system. Through the numerical simulation of SAP2000 and Abaqus finite element software, taking a six-story frame structure as an example, using pushover analysis method, the seismic performance of pure frame, ordinary infilled wall frame and rocking infill wall frame structure is compared. The feasibility of the rocking filled wall is verified, and the "swing" characteristic of the rocking infill wall is analyzed. In this paper, the dynamic time history analysis method is used to study the "rocking" characteristics of rocking wall and frame structure under dynamic condition, and the natural vibration period and displacement response of rocking filled wall-frame and pure frame are compared and analyzed. Hysteretic characteristics and energy dissipation capacity. The results show that when the horizontal earthquake action is small, the effect of rocking infill wall is the same as that of ordinary infill wall, when the earthquake action reaches a certain intensity, the partial infill wall plays the role of rocking wall, and the addition of rocking infill wall, The rocking infill wall can change and uniform the deformation distribution between layers of the structure, make the failure mechanism of the frame become integral failure, and effectively improve the ductility of the structure. The internal force of the rocked wall is smaller than that of the ordinary wall, and the failure time is later than that of the ordinary filled wall. The rocking of the wall increases the rigid body displacement of the structure and reduces the elastic-plastic displacement. Rocking-filled wall-frame structure has good seismic performance in static and dynamic simulation analysis.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

【相似文献】