本文選題：砌體填充墻 + 多層鋼筋混凝土框架結(jié)構(gòu)　； 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：填充墻框架結(jié)構(gòu)因其空間布置比較靈活等優(yōu)點被廣泛應(yīng)用到辦公樓、學(xué)校、商場及住宅中,是我國多高層建筑中比較常見的結(jié)構(gòu)形式之一。大量的試驗研究和理論分析表明,填充墻對框架結(jié)構(gòu)自振周期的影響是不能忽視的,本文主要從填充墻的砌體材料和空間布置兩個主要因素來考慮填充墻對框架結(jié)構(gòu)自振周期的影響,主要工作如下： 1)通過對框架結(jié)構(gòu)自振周期的理論計算方法以及基于結(jié)構(gòu)動力特性測試的各國經(jīng)驗公式的總結(jié),綜述了現(xiàn)有經(jīng)驗公式中考慮填充墻砌體材料和空間布置的經(jīng)驗公式極少的現(xiàn)狀,又通過對現(xiàn)有常見的填充墻簡化模型進行對比分析,指出了各簡化模型的使用范圍以及本文所使用的有限元模型。 2)采用有限元軟件ANSYS基于實際工程建立了一個四層鋼筋混凝土框架結(jié)構(gòu),通過對填充墻不同的砌體材料和空間布置建立有限元模型進行模態(tài)分析,并引入?yún)?shù)填充墻影響系數(shù)χT,該參數(shù)可以與結(jié)構(gòu)動力特性實測數(shù)據(jù)(即純框架結(jié)構(gòu)和填充墻框架結(jié)構(gòu)的自振周期)相對應(yīng),可以充分考慮填充墻剛度和質(zhì)量對框架結(jié)構(gòu)的影響,更接近于實際情況。結(jié)果表明四種不同砌體材料中彈性模量變化對填充墻框架結(jié)構(gòu)的自振周期影響最大；空間布置中水平方向應(yīng)盡量均勻布置,豎直方向不均勻布置中填充墻在薄弱層的填充率和薄弱層所在的樓層數(shù)對填充墻自振周期的影響很大。又通過單一考慮填充墻質(zhì)量和剛度的影響進行對比分析,以此得出質(zhì)量和剛度對自振周期影響的變化曲線。 3)通過對三棟多層鋼筋混凝土框架結(jié)構(gòu)(純框架結(jié)構(gòu)和填充墻框架結(jié)構(gòu))進行兩次結(jié)構(gòu)動力特性測試,和通過考慮填充墻剛度和不考慮填充墻剛度兩種方式建立有限元模型,并分別得出周期折減系數(shù)和填充墻影響系數(shù),希望以此嘗試建立周期折減系數(shù)和填充墻影響系數(shù)的關(guān)系式,填充墻影響系數(shù)可以更直觀的反映填充墻質(zhì)量和剛度對框架結(jié)構(gòu)的影響,通過周期折減系數(shù)和填充墻影響系數(shù)的關(guān)系式又可以指導(dǎo)和應(yīng)用于實際工程。
[Abstract]:The infilled wall frame structure is widely used in office buildings, schools, shopping malls and residential buildings because of its flexible space arrangement. It is one of the most common structural forms in multi-storey buildings in China. A large number of experimental studies and theoretical analysis show that the influence of infilled walls on the natural vibration period of frame structures can not be ignored. In this paper, the influence of infilled wall on the natural vibration period of frame structure is considered from two main factors of masonry material and space arrangement. The main work is as follows: 1) by summing up the theoretical calculation method of the natural vibration period of frame structure and the empirical formulas of various countries based on the testing of the dynamic characteristics of the structure, this paper summarizes the present situation of the few empirical formulas considering the masonry materials and the space arrangement of the infilled wall in the existing empirical formulas. By comparing and analyzing the common simplified model of infill wall, the application scope of each simplified model and the finite element model used in this paper are pointed out. 2) a four-story reinforced concrete frame structure based on practical engineering is established by using finite element software ANSYS. Modal analysis is carried out by establishing finite element model for different masonry materials and spatial arrangement of infilled walls. The influence coefficient 蠂 T of the infilled wall is introduced, which can correspond to the measured data of the dynamic characteristics of the structure (that is, the natural vibration period of the pure frame structure and the infilled wall frame structure), and the influence of the stiffness and mass of the infilled wall on the frame structure can be fully considered. Closer to the actual situation. The results show that the variation of elastic modulus in four kinds of masonry materials has the greatest influence on the natural vibration period of infilled wall frame structure, and the horizontal direction should be arranged uniformly in the space arrangement. The filling ratio of the infilled wall in the weak layer and the number of floors in the weak layer have a great influence on the natural vibration period of the infilled wall in non-uniform vertical arrangement. The influence of mass and stiffness on the natural vibration period is analyzed by comparing and analyzing the influence of the mass and stiffness of the infilled wall, and the variation curve of the effect of mass and stiffness on the natural vibration period is obtained. 3) the dynamic characteristics of three multi-story reinforced concrete frame structures (pure frame structure and infilled wall frame structure) are tested twice, and the finite element model is established by considering the infilled wall stiffness and not considering the infilled wall stiffness. And the periodic reduction coefficient and the infilled wall influence coefficient are obtained respectively, hoping to establish the relationship between the periodic reduction coefficient and the infilled wall influence coefficient. The influence coefficient of infill wall can reflect the influence of infill wall mass and stiffness on frame structure more intuitively, and it can be used in practical engineering through the relationship between periodic reduction coefficient and infill wall influence coefficient.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU375.4

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