本文選題：支撐體系 + 動(dòng)力荷載�。� 參考：《長春工程學(xué)院》2017年碩士論文

【摘要】：隨著高大建筑、大跨度建筑和都市大型基礎(chǔ)設(shè)施項(xiàng)目不斷出現(xiàn),使得鋼管支撐體系搭設(shè)高度不斷增加,雖然已有大量學(xué)者對模板支架開展現(xiàn)場調(diào)查、試驗(yàn)和論證,模板支撐架相關(guān)事故依然存在。通過查找大量文獻(xiàn)發(fā)現(xiàn),大量學(xué)者在支撐架設(shè)計(jì)時(shí)主要是從靜力性能方面研究,對于動(dòng)力性能方面的研究很少。本文通過設(shè)計(jì)5種高度不同的架體,依據(jù)單因素分析法,從架體的高寬比、步距、剪刀撐設(shè)置方式及節(jié)點(diǎn)剛度等因素方面,針對支撐架施工過程中所存在的沖擊荷載、風(fēng)荷載、地震荷載進(jìn)行研究,通過設(shè)定相關(guān)參數(shù)采用SAP2000對支撐體系進(jìn)行模態(tài)分析來研究架體的自振頻率,對架體進(jìn)行風(fēng)荷載、沖擊荷載、地震作用下的時(shí)程分析來研究架體在動(dòng)力荷載作用下的側(cè)移、變形等相關(guān)力學(xué)性能參數(shù)、對架體進(jìn)行屈曲分析來研究架體的極限承載力。通過以上的研究提出了架體自振頻率的計(jì)算公式、極限承載力計(jì)算公式以及布料桿斜撐與模板面夾角公式;提供了保證實(shí)際工程施工時(shí)架體在動(dòng)力荷載作用下穩(wěn)定性的構(gòu)造措施;證明施工過程中沖擊荷載的存在是模板支撐體系發(fā)生迅速倒塌的原因。最后通過一個(gè)工程實(shí)例提出了BIM技術(shù)在模板支架方案設(shè)計(jì)中的優(yōu)勢,根據(jù)有限元及理論計(jì)算結(jié)果驗(yàn)證了風(fēng)荷載及沖擊荷載作用下加強(qiáng)薄弱環(huán)節(jié)的必要性。本文的研究將會(huì)推動(dòng)模板支架研究工作的進(jìn)一步進(jìn)行,為以后的實(shí)際施工提供理論指導(dǎo)。
[Abstract]:With the emergence of large buildings, large span buildings and large urban infrastructure projects, the erection height of steel pipe bracing system has been increasing, although a large number of scholars have carried out field investigation, test and demonstration of the formwork support.Formwork support related accidents still exist.By looking up a large number of documents, it is found that a large number of scholars in the design of braces are mainly from the static performance of the research, the dynamic performance of the research is very little.In this paper, five kinds of frame with different heights are designed. According to the single factor analysis method, the impact load and wind load existing in the construction process of the support frame are analyzed from the aspects of the aspect of aspect of the aspect of the aspect of the aspect of the aspect such as the ratio of height to width of the frame, the step distance, the way of setting up the scissors brace and the joint stiffness.The seismic load is studied, the modal analysis of the bracing system is carried out by setting the relevant parameters, the natural vibration frequency of the frame is studied, and the wind load and impact load are carried out on the frame.The seismic time history analysis is used to study the lateral displacement and deformation of the frame under dynamic load, and the buckling analysis is carried out to study the ultimate bearing capacity of the frame.Through the above research, the formula of the natural vibration frequency, the ultimate bearing capacity and the angle between the inclined brace and the template surface of the frame are put forward.The structural measures to ensure the stability of frame body under dynamic load during construction are provided, and it is proved that the existence of impact load during construction is the reason for the rapid collapse of formwork bracing system.Finally, through an engineering example, the advantages of BIM technology in the design of formwork support scheme are put forward, and the necessity of strengthening weak links under wind load and impact load is verified by finite element method and theoretical calculation results.The research in this paper will promote the further research of formwork support and provide theoretical guidance for the practical construction in the future.
【學(xué)位授予單位】：長春工程學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU755.2

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