發(fā)布時(shí)間：2019-05-28 01:24

【摘要】：隨著人們物質(zhì)生活的提高,對(duì)住宅的要求越來(lái)越高,住宅的舒適性和美觀性得到結(jié)構(gòu)設(shè)計(jì)人員和開發(fā)商的重視。因此異形柱結(jié)構(gòu)以其獨(dú)特的構(gòu)造優(yōu)勢(shì)在工程中得到廣泛的應(yīng)用。目前,國(guó)內(nèi)外對(duì)異形柱研究較多,本文在前人研究的基礎(chǔ)上,對(duì)鋼筋混凝土十字形柱的力學(xué)性能,進(jìn)行了三維有限元數(shù)值模擬分析,主要研究?jī)?nèi)容如下:采用前人已做試驗(yàn)中的試件尺寸和材料力學(xué)指標(biāo),應(yīng)用有限元分析軟件ABAQUS,建立了鋼筋混凝土十字形軸心受壓柱有限元模型,進(jìn)行數(shù)值模擬分析。分析結(jié)果與試驗(yàn)結(jié)果基本吻合,驗(yàn)證了模型的合理性。利用上述模型,針對(duì)鋼筋混凝土十字形軸心受壓柱的力學(xué)性能,進(jìn)行了應(yīng)力和變形分析。研究了混凝土強(qiáng)度等級(jí)、長(zhǎng)細(xì)比、縱筋配筋率和體積配箍率等參數(shù)對(duì)其力學(xué)性能的影響。利用上述模型,進(jìn)行了鋼筋混凝土十字形偏心受壓柱三維有限元數(shù)值模擬分析,給定了界限偏心距的判定條件;探討了混凝土強(qiáng)度等級(jí)、縱筋配筋率和體積配箍率對(duì)界限偏心距的影響;分析了鋼筋混凝土十字形柱在單向小偏心、單向大偏心、雙向小偏心和雙向大偏心等四種受壓情況下混凝土強(qiáng)度等級(jí)、縱筋配筋率、體積配箍率和長(zhǎng)細(xì)比等參數(shù)對(duì)其力學(xué)性能的影響。
[Abstract]:With the improvement of people's material life, the requirements for housing are getting higher and higher, and the comfort and aesthetics of housing have been paid attention to by structural designers and developers. Therefore, special-shaped column structure has been widely used in engineering because of its unique structural advantages. At present, there are many researches on special-shaped columns at home and abroad. On the basis of previous studies, the three-dimensional finite element numerical simulation analysis of the mechanical properties of reinforced concrete cross-shaped columns is carried out in this paper. The main research contents are as follows: based on the specimen size and material mechanics index, the finite element model of reinforced concrete cross axial compression column is established by using the finite element analysis software ABAQUS, and the numerical simulation analysis is carried out. The analysis results are in good agreement with the experimental results, and the rationality of the model is verified. Based on the above model, the stress and deformation of reinforced concrete cross axial compression columns are analyzed. The effects of strength grade, slenderness ratio, longitudinal reinforcement ratio and volume hoop ratio on the mechanical properties of concrete are studied. Based on the above model, the three-dimensional finite element numerical simulation analysis of reinforced concrete cross eccentric compression columns is carried out, and the conditions for judging the limit eccentricity are given. The effects of concrete strength grade, longitudinal reinforcement ratio and volume hoop ratio on the limit eccentricity are discussed. The concrete strength grade and longitudinal reinforcement ratio of reinforced concrete cross columns under four kinds of compression conditions, such as unidirectional small eccentricity, unidirectional large eccentricity, bidirectional small eccentricity and bidirectional large eccentricity, are analyzed. Effects of volume hoop ratio and slenderness ratio on its mechanical properties.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU375

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