装配式预应力混凝土多层框架结构抗震性能分析

发布时间：2018-01-25 01:26

本文关键词： 装配式预应力混凝土多层框架有限元抗震性能构造措施　出处：《福州大学》2013年硕士论文　论文类型：学位论文

【摘要】：装配式预应力混凝土多层框架结构体系满足我国建筑业走可持续发展战略要求,应用前景广阔。然而,以往对其结构体系的研究主要集中在预应力混凝土梁柱节点的静力试验研究和计算分析方面；在整体结构方面,特别是整体结构抗震性能方面的研究却鲜见报道。此外,该结构体系中的预制板与梁的搭接面积小,预制板在高效预应力筋作用下产生反拱；预制板之间存在拼缝等必然会对楼盖和框架之间的协调工作产生影响,从而影响其框架结构的抗震性能。因此,有必要对装配式预应力混凝土多层框架结构的抗震性能进行研究。首先,本文通过分析阪神、唐山、汶川、玉树等地震中装配式房屋结构的破坏现象,总结了其破坏规律并提出了相应的防震措施。其次,本文运用SAP2000分别建立了装配式预应力混凝土多层框架结构和现浇多层框架结构的有限元模型进行对比分析。从结构的自振频率、振型等动力特性；楼层剪力、楼层变形、弹性层间位移等地震响应；顶点最大位移、最大加速度、柱底剪力等时程曲线；结构塑性发展、滞回曲线、累积滞回耗能等方面对装配式预应力混凝土多层框架结构进行抗震分析,探求该结构体系在多遇地震和罕遇地震作用下的抗震性能。再次,在既有装配式梁-板节点、拼缝、叠合面连接构造措施的基础上,总结并提出了几点改进装配式预应力混凝土多层框架结构的节点、拼缝、叠合面构造措施的建议。研究结果表明：(1)装配式预应力混凝土结构在各大地震中的实际震害表现为楼盖连接等非结构构件的破坏,其原因主要为楼盖自身及其连结构件的抗震强度不足和楼盖连接处薄弱造成的,应通过抗震验算和加强抗震构造措施来防止。(2)在多遇地震作用下,装配式预应力混凝土多层框架结构抗震性能与现浇多层框架结构相当；在罕遇地震作用下,其具有较好的延性和耗能能力,表现出了较优越的抗震性能。(3)梁-板连接节点处,宜在叠合梁上增设反沿,宜将预制板底端部钢筋伸出足够的锚固长度；在拼缝处,宜将齿形缝的矩形面改为圆弧面,宜设置接缝钢筋；在板的叠合面处,可将预制板中的纵向格构钢筋改为纵向肋。最后,本文根据装配式预应力混凝土多层框架结构抗震性能的分析结果,对其应用与研究问题作了些展望。
[Abstract]:Assembly prestressed concrete multi-story frame structure system meets the sustainable development strategy requirements of China's construction industry and has a broad application prospect. In the past, the research of its structure system mainly focused on the static test research and calculation analysis of the prestressed concrete Liang Zhu joint. However, there are few reports on the seismic behavior of the whole structure, especially on the seismic behavior of the whole structure. In addition, the overlap area between the prefabricated board and the beam is small, and the prefabricated slab produces the reverse arch under the action of high efficiency prestressing tendons. The existence of joint between the prefabricated panels will inevitably affect the coordination between the floor and the frame, thus affecting the seismic performance of the frame structure. It is necessary to study the seismic behavior of prestressing concrete multi-story frame structure. Firstly, this paper analyzes the damage phenomenon of prefabricated house structure in Hanshin, Tangshan, Wenchuan, Yushu and other earthquakes. The damage law is summarized and the corresponding earthquake prevention measures are put forward. Secondly. In this paper, the finite element models of prestressing concrete multi-story frame structure and cast-in-place multi-story frame structure are established by SAP2000, respectively. The dynamic characteristics of the structure, such as natural vibration frequency and vibration mode, are compared and analyzed. Floor shear force, floor deformation, elastic floor displacement and other seismic responses; Peak maximum displacement, maximum acceleration, column bottom shear and other time history curves; Structural plastic development, hysteretic curve, cumulative hysteretic energy dissipation and other aspects of prefabricated prestressed concrete multi-story frame structure seismic analysis. To explore the seismic performance of the structure system under the action of frequent and rare earthquakes. Thirdly, on the basis of the existing structural measures of prefabricated beam-plate joints, joints and overlapping planes. This paper summarizes and puts forward several points to improve the joints and joints of prestressing concrete multi-story frame structure. The research results show that the actual earthquake damage of prestressing concrete structure in every major earthquake is the failure of non-structural members such as floor connection. The main reasons are the insufficient seismic strength of floor itself and its connecting members and the weakness of floor joints, which should be prevented by seismic checking and strengthening seismic structural measures. The seismic behavior of prestressing concrete multi-story frame structure is equivalent to that of cast-in-place multi-story frame structure. Under the action of rare earthquake, it has better ductility and energy dissipation ability, and shows superior seismic performance. 3) the joint of beam-plate should be added to the composite beam. The reinforcement at the bottom of the prefabricated plate should be extended with sufficient anchoring length; At the joint, the rectangular surface of the tooth joint should be changed to the arc surface, and the joint reinforcement should be set. The longitudinal lattice reinforcement in prefabricated slab can be changed into longitudinal rib at the superimposed plane. Finally, the seismic behavior of prefabricated prestressed concrete multi-story frame structure is analyzed in this paper. Some prospects for its application and research are given.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU378.4;TU352.11

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