本文選題：磷石膏　切入點：空腔樓蓋　出處：《昆明理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：磷石膏空腔模盒組合樓板是一種新型的結構形式,以預制磷石膏空腔模盒作為永久性施工內模填充材料,從而使樓板內部形成空腔結構。這種結構形式不僅充分利用了工業(yè)廢料磷石膏,而且該結構形式具有自重輕、剛度大、施工方便及提高凈空等特點,適用于大柱網、大跨度、大開間等建筑。目前國內外對該體系研究有限,本論文通過對構件填充材料磷建筑石膏膠凝材料的初步制備以及其力學性能、石膏空腔模盒的體型及應用,構件的試驗以及有限元模擬進行了研究,其研究內容如下:(1)通過對云南省云天化三環(huán)化工集團有限公司提供的磷石膏預處理得到磷建筑石膏,并以磷建筑石膏作為主要膠凝材料,并摻加外摻料以及外加劑等,均勻加水拌合后,得到磷建筑石膏基膠凝材料。(2)通過對磷建筑石膏試件的抗壓強度、抗折強度、彈性模量、泊松比的力學性能測定,得出較優(yōu)的配合比參數。并測出磷建筑石膏試件的抗壓強度為14.8MPa,抗折強度為5.3MPa,彈性模量為1486N/mm2,泊松比為0.12。(3)對磷建筑石膏空腔模盒體型、制作特性、施工特性、性能及應用的研究,得到的石膏空腔模盒的體型設計合理,受力性能較好且空心率高。(4)通過對石膏空腔模盒進行構件的設計及制作,并對其3組不同結構的構件進行靜載試驗,主要分析了構件在集中荷載的作用下底部中心位移、主要部位的應變以及破壞狀態(tài)下裂縫的發(fā)展等。通過對比3組不同結構的構件,2-1-2三排半橢球體石膏空腔模盒構件的極限破壞荷載為254kN,且主要部位的應變分布范圍小,破壞時裂縫成對角線的形式貫通板底的X型裂縫帶。最終得出2-1-2三排半橢球體石膏空腔模盒構件的石膏空腔模盒體型以及擺放位置是最有利構件的受力狀態(tài)。(5)利用有限元軟件Ansys對試件進行了非線性有限元分析。主要分析了 3中不同結構構件的變形、應變等。對比得出構件的在集中荷載的作用下,2-1-2三排半橢球體石膏空腔模盒構件開裂時板底中心位移時0.44mm,且板底主要部位的應變較小。同時將有限元分析主要結果與試驗結果對比得出:2-1-2三排半橢球體石膏空腔模盒構件開裂時中心位移、應變的分布相差不大。
[Abstract]:The phosphogypsum cavity box composite floor is a new type of structure. The prefabricated phosphogypsum cavity box is used as the filling material for the permanent construction internal mold. The structure not only makes full use of phosphogypsum from industrial waste, but also has the characteristics of light weight, high rigidity, easy construction and high clearance. It is suitable for large column net and long span. At present, the research on this system is limited at home and abroad. In this paper, the preliminary preparation and mechanical properties of phosphogypsum cementitious material, the shape and application of gypsum hollow cavity box, are studied. The experiment of the component and the finite element simulation are studied. The research contents are as follows: (1) the phosphogypsum is obtained by pretreatment of phosphogypsum provided by Yuntianhua Sanhuan Chemical Group Co., Ltd. Taking phosphogypsum as the main cementitious material, and adding admixture and admixture, after evenly mixing with water, the phosphogypsum based cementitious material. 2) the compressive strength, flexural strength and elastic modulus of phosphorous building gypsum are obtained. The mechanical properties of Poisson's ratio were measured and the optimum mix ratio parameters were obtained. The compressive strength, flexural strength, elastic modulus and Poisson's ratio of phosphogypsum plaster were 14.8MPa, 5.3MPa, 1486Nm2 and 0.12.3respectively. The construction characteristics, performance and application of the gypsum hollow cavity box are studied. The results show that the shape design of the gypsum cavity cavity box is reasonable, the mechanical performance is better and the hollow rate is high. 4) through the design and manufacture of the gypsum hollow cavity mold box, The static load tests of three groups of members with different structures are carried out, and the central displacement at the bottom of the member under concentrated load is mainly analyzed. The strain of the main parts and the development of cracks in the failure state are compared. The ultimate failure load of the three groups of members with different structures is 254kN, and the strain distribution range of the main parts is small, and the limit failure load of the structure is 254kN. At the time of failure, the cracks form diagonal form through the X-shaped fracture zone at the bottom of the board. Finally, the shape and position of the gypsum hollow cavity box of 2-1-2 rows of semi-ellipsoidal gypsum hollow cavity box members are the most favorable force state of the components. The nonlinear finite element analysis of the specimen was carried out with the finite element software Ansys. The results show that the central displacement of the plate bottom is 0.44 mm when the structure is cracked, and the strain of the main part of the board bottom is small. At the same time, the main results of finite element analysis are summarized. Compared with the experimental results, the central displacement of the hollow cavity box members of the three rows of half ellipsoid gypsum with two rows of two to one two is obtained when they crack. The distribution of strain is similar.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU52

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本文編號：1565985