屈曲约束支撑钢筋混凝土框架结构干式柔性梁柱节点抗震性能研究

发布时间：2018-08-30 12:56

【摘要】：与现浇混凝土结构相比,装配式建筑具有生产效率高、环境友好等优势,近年来得到较快发展,其优点毋庸置疑。梁柱节点是结构实现装配化的重点,因此,探究梁柱节点受力性能具有重要意义。本文在国内外对装配框架梁柱节点及屈曲约束支撑框架研究的基础上提出了一种由受弯框架与采用梁柱柔性节点的屈曲约束支撑框架并联组成的装配式混凝土双重抗侧力体系,并着重考察柔性节点的受力性能,主要研究内容如下:(1)采用SAP2000对所提出的双重抗侧体系进行水平荷载下的推覆分析,探究柔性节点的受力性能及节点处的传力途径;(2)提出一种应用于混凝土框架的梁柱干式节点,该节点可实现柔性连接,便与更换和修复。设计并完成5个装配式框架梁柱节点和1个现浇梁柱节点的往复加载试验。(3)考察楼板、节点处开孔形式及BRB承载力对节点受力性能和破坏模态的影响,并将干式节点与现浇节点进行对比。通过以上研究,得到主要结论如下:(1)柔性节点会承担一定轴力,轴力大小约为BRB沿梁方向的分量。(2)该干式梁柱柔性节点具有很大的变形能力,能够满足抗震设计的要求。(3)与现浇节点相比,千式节点的破坏模态有利于保护主体结构,节点的设计方法合理。干式节点在规范容许的层间位移角内不会发生明显的局部损伤。(4)混凝土楼板会显著提高该柔性节点的刚度和承载力,在设计时需要予以考虑。考虑楼板后,柔性节点的承载力约为现浇节点的一半,具有半刚性的特点。(5)在层间位移角小于等于1/50时,在柔性节点中采用圆孔或长圆孔的连接方式对整体结构影响不大,因此在实际应用中可不必特意留设长圆孔。
[Abstract]:Compared with the cast-in-place concrete structure, the prefabricated building has the advantages of high production efficiency and friendly environment, which has been developed rapidly in recent years, and its advantages are beyond doubt. Liang Zhu joint is the focal point of structure assembly. Therefore, it is of great significance to explore the mechanical properties of Liang Zhu joint. On the basis of the research on Liang Zhu joints and buckling restrained bracing frames at home and abroad, this paper presents an assembly concrete dual lateral force resisting system which consists of flexural frame and buckling restrained bracing frame, which is composed of flexural frame and flexural braced frame with Liang Zhu flexible joint. The main contents of the study are as follows: (1) the push-over analysis of the proposed double-lateral anti-lateral system is carried out by using SAP2000 under horizontal load. The mechanical properties of flexible joints and the transmission of force at the joints are explored. (2) A kind of Liang Zhu dry-type joint applied to concrete frame is proposed, which can realize flexible connection and be replaced and repaired. The reciprocating loading tests of five assembled frame Liang Zhu joints and one cast-in-place Liang Zhu joint were designed and completed. (3) the effects of the opening form of the floor, the opening form of the joint and the BRB bearing capacity on the mechanical behavior and failure mode of the joints were investigated. The dry node is compared with the cast-in-place node. The main conclusions are as follows: (1) the flexible joints bear a certain axial force, and the axial force is about the component of BRB along the beam direction. (2) the dry Liang Zhu flexible joint has great deformation ability. (3) compared with cast-in-place joints, the failure mode of thousand joints is favorable to protect the main structure, and the design method of joints is reasonable. There is no obvious local damage to the dry-type joints within the allowable interstory displacement angle. (4) the stiffness and bearing capacity of the flexible joints can be significantly improved by concrete slabs, which should be considered in the design. After considering floor slab, the bearing capacity of flexible joints is about half of that of cast-in-place joints, which is semi-rigid. (5) when the interstory displacement angle is less than 1 / 50, the connection mode of circular or long circular holes in flexible joints has little effect on the overall structure. Therefore, it is not necessary to set long circular holes in practical application.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11;TU375.4

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