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论文中文题名:

 SRC-RC竖向混合框架结构受力性能研究    

姓名:

 曹青    

学号:

 201109399    

保密级别:

 公开    

学科代码:

 081402    

学科名称:

 结构工程    

学生类型:

 硕士    

学位年度:

 2014    

院系:

 建筑与土木工程学院    

专业:

 结构工程    

研究方向:

 高层建筑结构设计与计算    

第一导师姓名:

 邹仁华    

第一导师单位:

 西安科技大学    

论文外文题名:

 Mechanical Behavior of SRC-RC vertical hybrid frame structure    

论文中文关键词:

 SRC-RC ; 混合结构 ; 型钢混凝土 ; Pushover分析 ; 时程分析    

论文外文关键词:

 SRC-RC ; hybrid structures ; steel reinforced concrete ; transfer story ; Pushover a    

论文中文摘要:
SRC-RC竖向混合结构是指主要由型钢混凝土构件和混凝土构件组合而成的一种新型结构形式。SRC-RC竖向混合结构能够充分利用普通混凝土结构和型钢混凝土结构的各自优点。这种新型建筑形式既能满足较好的结构抗震性能又能减小建筑的造价,从而能够实现较好地将经济性能与抗震性能相统一。 论文对Pushover分析和时程分析的基本原理、分析步骤、基本功能等问题进行了针对性的阐述。通过对8层(4个模型)和12层(5个模型)共9个SRC-RC竖向混合框架模型进行静力和动力弹塑性分析,研究了竖向转换层所处位置不同对结构受力性能的影响,给出了转换层所在层数与结构总层数的合理比值。通过分析SRC-RC竖向混合框架结构的基底剪力与顶点侧移曲线、极限层间位移角及塑性铰分布,探讨了SRC-RC竖向混合框架结构的抗震性能。 研究结果表明,在相同梁柱截面参数情况下,采用SRC-RC结构,可使结构的极限水平承载力较RC结构大幅提高;SRC-RC竖向混合框架结构转换层所在层数与结构总层数的比值为1/3左右时,可以有效减弱竖向刚度突变对结构受力的不利影响,能够满足“强柱弱梁”的抗震设计要求,在整个结构形成机构之前,能够出现充分的塑性铰来吸收和耗散地震能量,使结构能够经受罕遇地震作用而不倒塌;由Pushover分析得出的结构构件塑性铰发展规律可以看,推覆过程中框架的中下部各层的梁端开始陆续出现塑性铰,并逐渐向上发展,最终因中部梁形成机构导致结构破坏;通过对比模型静力和动力弹塑性分析的塑性铰分布规律,可以看出在多遇地震和罕遇地震作用下静力和动力弹塑性分析塑性铰分布存在一定差距,与静力弹塑性分析相比,在动力弹塑性分析下结构构件的塑性铰分布数量得到增加且其发展得到进一步加强。
论文外文摘要:
SRC-RC vertical hybrid structure refers to a new type of structure which is mainly a combination of Steel reinforced concrete structures and concrete structures. SRC-RC vertical hybrid structure take advantage of the respective merits of ordinary concrete structures and steel reinforced concrete structures. This new architectural form not only can meet better seismic performance ,but also can reduce the cost of the building, which can achieve better economic performance and seismic performance of unity. In this paper, the basic principle, the analysis procedure and the basic function of Pushover analysis method and time history analysis are introduced. Based on 8 and 12 floors , a total of 9 vertical hybrid frame model Pushover analysising and time history analysis, the study on the vertical location of the structural transfer story forcing performance, giving the reasonable ratio of the transfer story where the number of floors and structures of the total number of the floors. By analyzing the relationship between bottom shear force and the displacement at top of frame ,ultimate story displacement angle and distribution of plastic hinges of the SRC-RC vertical hybrid frame structure , discussing the seismic performance of the SRC-RC vertical hybrid frame structur. The results show that under the same circumstances of the beam and column, the use of SRC-RC structure can increase the ultimate bearing capacity of the structure of the level of a substantial over the RC structure. Ratio of the SRC-RC transfer story where the number of floors and structures of the total number of the floors is about 1/3, which can effectively decrease the adverse effects of vertical stiffness of the structure and can meet the "strong column weak beam" seismic design requirements, before the entire structure damage can appear sufficient plastic hinge to absorb and dissipate seismic energy, so that the structure can withstand rare earthquake without collapsing. According to the law of development of plastic hinges structural members by the Pushover Analysis, it shows that the middle and lower layers of the framework’s beam end began to appear plastic hinges in the process of pushover, and the plastic hinges gradually move upwards, due to the central beam forming means ultimately lead to structural damage. Based on comparing the distribution of plastic hinges by static and dynamic elastic-plastic analysis, the distribution of plastic hinge in the case of multiple earthquakes and rare earthquake under static and dynamic elastic-plastic analysis exists a certain gap,compared with Pushover analysis, the quantitative distribution of the structural members’ plastic hinges be increased and its development has been further strengthened under dynamic elastic-plastic analysis.
中图分类号:

 TU398    

开放日期:

 2014-06-10    

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