基于OpenSEES对钢筋混凝土侧煤仓结构弹塑性地震反应分析

发布时间：2018-06-27 10:55

本文选题：钢筋混凝土侧煤仓结构 + OpenSEES　；参考：《西安理工大学》2017年硕士论文

【摘要】：电力系统作为现代社会的生命线,在国民经济中占有重要地位。侧煤仓结构是目前较为新颖的火力发电厂主厂房布置方案。传统的侧煤仓结构钢煤斗容量有限,结构纵向侧移较大。针对这些问题,西北电力设计院试设计出一种新型火电厂主厂房结构——钢筋混凝土侧煤仓结构,其中混凝土墙采取集中布置,并且钢筋混凝土煤斗可以为结构提供较大抗侧刚度。本文将以西北电力设计院的试设计结构为研究对象,对其展开精细化研究,以检验该类结构是否能达到抗震要求。本文基于OpenSEES建立火电厂钢筋混凝土侧煤仓结构空间有限元分析模型,对结构进行动力弹塑性时程分析。本文的研究内容主要包括以下几个方面:(1)首先对OpenSEES软件在结构非线性计算时的过程进行具体分析,确定OpenSEES分析平台关于建模的各种参数。(2)对某钢筋混凝土侧煤仓结构进行动力特性分析。结果表明,结构第五、六层混凝土墙的布置使主厂房纵、横向刚度相当,在水平地震作用下两方面变形相似、承载力一致。(3)输入单向水平地震作用,对结构进行弹塑性时程分析。对结构的楼层侧移、基底剪力、柱剪力、加速度放大系数、截面延性等参数进行分析,判断结构的薄弱部位。结果表明:不同地震波作用下结构弹塑性分析结果基本一致;结构的底层及第二层、顶层为结构薄弱层。梁柱构件满足“强柱弱梁”的原则。(4)输入三向地震作用,对结构进行弹塑性时程分析,将其结果与单向水平地震作用下结构的弹塑性分析结果进行对比。结果表明,竖向地震作用对该类结构有一定影响,设计时应予以考虑。本文的分析结果可以为今后此类侧煤仓结构的工程设计提供一定的理论依据。
[Abstract]:As the lifeline of modern society, electric power system plays an important role in the national economy. Side coal bunker structure is a novel layout scheme of main power plant in thermal power plant. The traditional side coal bunker steel hopper has a limited capacity and a large longitudinal displacement. In view of these problems, the Northwest Electric Power Design Institute has designed a new type of main powerhouse structure of thermal power plant-reinforced concrete side coal bunker structure, in which the concrete wall is centrally arranged. And the reinforced concrete coal hopper can provide greater lateral stiffness for the structure. In this paper, the experimental design structure of Northwest Electric Power Design Institute will be taken as the research object, and the detailed study will be carried out to verify whether the structure can meet the seismic requirements. The spatial finite element analysis model of reinforced concrete side coal bunker structure in thermal power plant is established based on OpenSEES, and the dynamic elastoplastic time history analysis of the structure is carried out. The main research contents of this paper are as follows: (1) the process of OpenSEES software in the process of structural nonlinear calculation is analyzed. The modeling parameters of OpenSEES analysis platform are determined. (2) the dynamic characteristics of a reinforced concrete side coal bunker structure are analyzed. The results show that the arrangement of the fifth and sixth floor concrete walls of the structure makes the longitudinal and transverse stiffness of the main building equal, and the deformation is similar and the bearing capacity is the same under the horizontal earthquake. (3) the input unidirectional horizontal earthquake action, The elastoplastic time history analysis of the structure is carried out. The structural parameters, such as lateral displacement, base shear, column shear, acceleration magnification factor and section ductility, are analyzed to determine the weak position of the structure. The results show that the results of elastic-plastic analysis of structures under different seismic waves are basically consistent, and the bottom and second layers of the structure are the weak layers of the structure. The Liang Zhu members satisfy the principle of "strong column and weak beam". (4) the elastoplastic time-history analysis of the structure is carried out by inputting the three-way seismic action, and the results are compared with the results of the elastic-plastic analysis of the structure under unidirectional horizontal earthquake. The results show that vertical seismic action has certain influence on this kind of structure, which should be considered in design. The results of this paper can provide some theoretical basis for the engineering design of this kind of side coal bunker structure in the future.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU375;TU311.3

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