【摘要】：本課題旨在研究輕鋼與泡沫混凝土兩種材料結(jié)合而成的新型組合樓板結(jié)構(gòu)。泡沫混凝土常被作為保溫材料用于建筑結(jié)構(gòu),其具有輕質(zhì)、保溫及耐火等優(yōu)點(diǎn),以泡沫混凝土為基本材料與輕鋼組合,基于兩種材料的特性提出了輕鋼與泡沫混凝土組合樓板,并以輕鋼與泡沫混凝土單向板作為基本研究?jī)?nèi)容,此種構(gòu)件具有輕質(zhì)、高強(qiáng)、抗震性強(qiáng)以及環(huán)保等特點(diǎn),并解決了組合樓板中防火性能差的弊端。本文利用有限元與力學(xué)試驗(yàn)結(jié)合的研究方法,意在明確輕鋼與泡沫混凝土組合單向板的破壞機(jī)理,其中研究?jī)?nèi)容主要包括:總結(jié)組合板各破壞階段,觀察裂縫開展情況,確定極限承載力,以及不同因素變量對(duì)組合板相關(guān)力學(xué)性能的影響,并為后續(xù)理論完善、公式推導(dǎo)研究工作提供理論依據(jù)。首先對(duì)輕鋼與泡沫混凝土組合單向板進(jìn)行設(shè)計(jì),包括截面設(shè)計(jì)與構(gòu)件尺寸等,結(jié)合有限元軟件對(duì)構(gòu)件進(jìn)行建立模擬分析模型,繼而對(duì)模型受力分析,利用已得到模擬數(shù)據(jù)指導(dǎo)試驗(yàn),并用試驗(yàn)結(jié)果驗(yàn)證模擬的正確性。制作輕鋼與泡沫混凝土組合單向板構(gòu)件,設(shè)計(jì)組合板的力學(xué)受彎試驗(yàn),通過觀察組合板破壞過程,總結(jié)組合板各破壞階段。得出組合板以受壓區(qū)泡沫混凝土壓碎為破壞標(biāo)志,并具備延性破壞特征,整個(gè)破壞過程合理。對(duì)比模擬與試驗(yàn)相應(yīng)數(shù)值,證明有限元在結(jié)構(gòu)分析中的準(zhǔn)確性�；谟邢拊诜治鲋械臏�(zhǔn)確性,進(jìn)一步利用其模擬分析了泡沫混凝土密度等級(jí)、輕鋼強(qiáng)度、輕鋼布置間距、分布橫向板帶間距和組合板保護(hù)層厚度對(duì)組合板承載力、整體剛度以及破壞機(jī)理的影響。本文所研究的內(nèi)容均不考慮兩種材料的滑移,在制作試驗(yàn)構(gòu)件時(shí),設(shè)置了充足的抗剪連接件,以減少滑移對(duì)結(jié)果的影響。
[Abstract]:The purpose of this paper is to study a new type of composite floor structure composed of light steel and foam concrete. Foam concrete is often used as thermal insulation material in building structure. It has the advantages of light weight, heat preservation and fire resistance. Based on the characteristics of two kinds of materials, the composite slab of light steel and foam concrete is put forward, in which foam concrete is used as the basic material and light steel is combined with light steel. Taking the unidirectional slab of light steel and foam concrete as the basic research content, this kind of component has the characteristics of light weight, high strength, strong seismic resistance and environmental protection, and solves the disadvantage of poor fire resistance in the composite floor. The purpose of this paper is to clarify the failure mechanism of composite unidirectional slabs of light steel and foam concrete by means of finite element method and mechanical test. The main contents of the research include: summing up the failure stages of composite slabs, observing the development of cracks, The ultimate bearing capacity and the influence of different factor variables on the related mechanical properties of composite plate are determined, and the theoretical basis is provided for further theoretical improvement and formula derivation. First of all, the composite unidirectional slab of light steel and foamed concrete is designed, including section design and component size, and the simulation analysis model is established with the finite element software, and then the stress of the model is analyzed. The simulation data are used to guide the experiment, and the experimental results are used to verify the correctness of the simulation. The composite unidirectional slab members of light steel and foam concrete were made and the mechanical bending test of composite slab was designed. The failure process of composite plate was observed and the failure stages of composite slab were summarized. It is concluded that the composite slab is damaged by crushing foam concrete in compression zone and has ductile failure characteristics, and the whole failure process is reasonable. The accuracy of finite element method in structural analysis is proved by comparing the corresponding numerical value of simulation and test. Based on the accuracy of finite element analysis, the bearing capacity of composite concrete is further analyzed by using its density grade, light steel strength, light steel arrangement spacing, transverse slab-belt spacing and composite plate cover thickness. The influence of overall stiffness and failure mechanism. In order to reduce the effect of slippage on the results, sufficient shear connectors are set up in order to reduce the effect of slippage on the results.
【學(xué)位授予單位】：吉林建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU398.9

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