【摘要】：眾多的震害調(diào)查顯示,作為目前應(yīng)用最廣泛的鋼筋混凝土框架結(jié)構(gòu)在不同強(qiáng)度的地震中都會(huì)遭受不同程度的損傷或破壞。如果結(jié)構(gòu)在損傷的情況下繼續(xù)使用,不加以修整維護(hù),那么損傷就會(huì)隨時(shí)間不斷累積疊加并最終發(fā)展成破壞甚至倒塌。所以,將累積損傷效應(yīng)的研究對(duì)象選為鋼筋混凝土框架結(jié)構(gòu),使研究更具備現(xiàn)實(shí)意義和應(yīng)用價(jià)值。本文以一幢六層鋼筋混凝土框架結(jié)構(gòu)職工宿舍樓為研究背景,以結(jié)構(gòu)在不同地震加速度峰值組合作用下的累積損傷效應(yīng)為研究對(duì)象。用ANSYS有限元分析軟件,應(yīng)用新提出的基于位移與剛度退化新型組合方式的雙參數(shù)損傷模型,計(jì)算并分析鋼筋混凝土框架結(jié)構(gòu)在考慮累積損傷效應(yīng)時(shí)的地震響應(yīng)及損傷情況。通過(guò)以上研究工作,得出以下結(jié)論：(1)建立有限元模型后,對(duì)鋼筋混凝土框架結(jié)構(gòu)進(jìn)行靜力分析,分析鋼筋混凝土框架結(jié)構(gòu)在考慮剛度退化和不考慮剛度退化兩種情況下的受力性能,進(jìn)一步驗(yàn)證對(duì)結(jié)構(gòu)進(jìn)行損傷評(píng)估時(shí),考慮剛度退化的分析結(jié)果更符合工程實(shí)際。(2)在總結(jié)和分析國(guó)內(nèi)外具有代表性的單參數(shù)和雙參數(shù)損傷模型的基礎(chǔ)上,對(duì)有限元計(jì)算模型參數(shù)進(jìn)行優(yōu)化,提出了包括位移與剛度退化兩個(gè)參數(shù)的新型組合方式的損傷模型。(3)用新型組合方式的雙參數(shù)損傷模型對(duì)鋼筋混凝土框架結(jié)構(gòu)進(jìn)行動(dòng)力分析,得到位移時(shí)程曲線,對(duì)比鋼筋混凝土框架結(jié)構(gòu)在不同地震加速度峰值組合方式下受累積損傷效應(yīng)的影響情況,并將計(jì)算分析結(jié)果與不考慮累積損傷效應(yīng)時(shí)鋼筋混凝土框架結(jié)構(gòu)的損傷情況進(jìn)行比較,研究其損傷規(guī)律。
[Abstract]:Many earthquake damage investigations show that the reinforced concrete frame structure, which is the most widely used at present, will suffer different degrees of damage or damage in earthquake of different strength. If the structure continues to be used under the condition of damage and does not be repaired and maintained, then the damage will accumulate over time and eventually develop into failure or even collapse. Therefore, the research object of cumulative damage effect is chosen as reinforced concrete frame structure, which makes the research more practical and practical. This paper takes a six-story reinforced concrete frame structure as the research background, and takes the cumulative damage effect of the structure under the combination of different earthquake acceleration peak values as the research object. The seismic response and damage of reinforced concrete frame structure considering cumulative damage effect are calculated and analyzed by using ANSYS finite element analysis software and a new two-parameter damage model based on a new combination of displacement and stiffness degradation. Through the above research work, the following conclusions are drawn: (1) after establishing the finite element model, the static analysis of reinforced concrete frame structure is carried out. The mechanical performance of reinforced concrete frame structure considering stiffness degradation and not considering stiffness degradation is analyzed, and the damage assessment of the structure is further verified. The analysis results considering stiffness degradation are more in line with the engineering practice. (2) on the basis of summarizing and analyzing the representative single-parameter and two-parameter damage models at home and abroad, the parameters of the finite element calculation model are optimized. A new combined damage model with two parameters of displacement and stiffness degradation is proposed. (3) the dynamic analysis of reinforced concrete frame structure is carried out by using the two-parameter damage model of new combination mode, and the displacement time history curve is obtained. The influence of cumulative damage effect on reinforced concrete frame structure under different combination modes of earthquake acceleration peak value is compared, and the results of calculation and analysis are compared with those of reinforced concrete frame structure without consideration of cumulative damage effect. The damage law was studied.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU375.4;TU317

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