预应力高性能混凝土框架结构静力和动力弹塑性分析

发布时间：2018-05-04 18:27

本文选题：预应力高性能混凝土框架 + 静力弹塑性分析　；参考：《合肥工业大学》2017年硕士论文

【摘要】：随着经济和技术不断发展带动着我国建筑材料行业的蓬勃发展,高性能混凝土材料因为其优越的工作性能越来越多的被用于工程实践中,专家学者们也正在致力于对高性能混凝土材料以及高性能混凝土结构的研究。有关于高性能混凝土梁、柱、节点以及框架的抗震性能研究也已经取得了很多实质性的研究成果。本文介绍了高性能混凝土的一般概念和发展历程,并着重介绍了轻骨料混凝土中的粉煤灰陶粒混凝土。根据他人所做的关于粉煤灰陶粒混凝土的力学实验结果,利用有限元分析软件SAP2000分别建立了预应力粉煤灰陶粒混凝土框架和普通预应力框架结构,采用静力弹塑性方法对基底剪力—顶点位移曲线以及在多遇和罕遇地震作用下的性能点、层间位移角大小和塑性铰发展规律进行分析比较。由于pushover分析方法在理论和基本假定方面存在着一定的缺陷性,而目前动力时程分析方法是结构抗震性能分析最为准确的分析方法,所以本文又对预应力粉煤灰陶粒混凝土框架和普通预应力框架进行了动力时程分析,得到框架在EL-Cent波、Taft波和人工波(兰州波)三种地震波作用下的层间位移角、基底剪力、顶点位移的分析对比结果。经过静力和动力分析表明:采用粉煤灰陶粒混凝土这种高性能混凝土材料的框架基底剪力小于同等情况下的普通混凝土框架结构,而顶点位移、层间位移以及层间位移角则大于普通混凝土框架。预应力粉煤灰陶粒混凝土框架和普通预应力框架塑性铰发展存在着一定的规律性:塑性铰首先出现在底层中柱柱底,随着推覆步骤的进行,塑性铰逐渐向着上层的梁端发展,中柱的部分柱端也出现一定的塑性铰,形成了柱脚、梁、中柱柱端的合理耗能机制。预应力高性能混凝土框架在多遇和罕遇地震作用下均能满足结构抗震设防的要求,具有良好的抗震性能。
[Abstract]:With the development of economy and technology, high performance concrete materials are used in engineering practice more and more because of its superior working performance. Experts and scholars are also working on high-performance concrete materials and high-performance concrete structures. The seismic behavior of high performance concrete beams, columns, joints and frames has also been studied. This paper introduces the general concept and development course of high performance concrete, and emphatically introduces fly ash ceramsite concrete in light aggregate concrete. According to the results of mechanical experiments on fly ash ceramsite concrete made by others, the prestressed fly ash ceramsite concrete frame and the common prestressed concrete frame structure were established by using the finite element analysis software SAP2000, respectively. The static elastoplastic method is used to analyze and compare the shear-vertex displacement curve of the base, the performance points under rare and rare earthquakes, the displacement angle between layers and the development law of plastic hinge. Because the pushover analysis method has some defects in theory and basic assumptions, the dynamic time-history analysis method is the most accurate analysis method for seismic performance analysis of structures at present. So in this paper, the dynamic time history analysis of prestressed fly ash ceramsite concrete frame and ordinary prestressed concrete frame is carried out, and the interlayer displacement angle and the base shear force of the frame are obtained under the action of EL-Cent wave Taft wave and artificial wave (Lanzhou wave). Analysis and comparison of vertex displacement. The results of static and dynamic analysis show that the shear force of the frame base with fly ash ceramsite concrete is lower than that of the ordinary concrete frame structure under the same condition, but the peak displacement is lower than that of the normal concrete frame structure under the same condition. The interstory displacement and the interstory displacement angle are larger than that of ordinary concrete frame. There are some regularity in the development of prestressing fly ash ceramsite concrete frame and common prestressed concrete frame. Plastic hinge first appears at the bottom of column in the bottom of column, and with the step of nappe, the plastic hinge gradually develops to the upper beam end. Some of the ends of the middle column also have plastic hinge, forming the reasonable energy dissipation mechanism of the column foot, beam and middle column end. Prestressed high performance concrete frame can meet the requirements of seismic fortification under rare and frequent earthquakes and has good seismic performance.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU378.4

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