本文選題：無機聚合物混凝土 + 應力-應變?nèi)���； 參考：《武漢理工大學》2013年碩士論文

【摘要】：無機聚合物混凝土作為一種新型的建筑材料,由于其原材料豐富、價格低廉、環(huán)境污染小、早強快硬等特點,引起了國內(nèi)外研究學者的關注。本文通過對無機聚合物混凝土進行基本力學性能實驗、無機聚合物混凝土梁受彎性能有限元分析、有粘結(jié)預應力無機聚合物混凝土梁受彎性能試驗和有限元分析,得到的主要研究工作和獲得的成果包括以下幾個方面： 1、通過試驗研究確定了IPC40無機聚合物混凝土的基本力學性能,包括彈性模量、泊松比、應力-應變?nèi)�,為后文無機聚合物混凝土試件的受力性能及有限元分析提供重要參數(shù)。 2、采用ANSYS建立了無機聚合物混凝土梁的有限元分析模型,同時引入粘結(jié)滑移本構(gòu)模型,對無機聚合物混凝土梁的特征荷載值及其判斷準則、荷載-撓度曲線、彈簧粘結(jié)應力、裂縫形態(tài)分布進行了分析,并將數(shù)值模擬結(jié)果與實驗結(jié)果進行對比。分析結(jié)果表明：基于《混凝土結(jié)構(gòu)設計規(guī)范》的帶肋鋼筋與混凝土粘結(jié)滑移本構(gòu)關系通過相關單元選取及參數(shù)設置運用于無機聚合物混凝土梁的計算結(jié)果是較為理想的；考慮粘結(jié)滑移的模型整體剛度有一定降低,極限荷載比不考慮粘結(jié)滑移的值要小,跨中撓度的發(fā)展更接近試驗結(jié)果。 3、通過對三根預應力無機聚合物混凝土梁和一根預應力普通混凝土梁在靜力荷載作用下受彎性能的試驗研究,結(jié)果表明：預應力無機聚合物混凝土梁和預應力普通混凝土梁的受力全過程發(fā)展相似,但相對于預應力無機聚合物混凝土梁,預應力普通混凝土梁在各級荷載下所對應的撓度發(fā)展更快,同時裂縫的發(fā)展也更為迅速。三根預應力無機聚合物混凝土梁的開裂荷載平均值為230kN,大于預應力普通混凝土梁的開裂荷載160kN；極限荷載值較為接近,達到了780kN左右。 4、對于有粘結(jié)預應力無機聚合物混凝土梁進行的數(shù)值模擬分析結(jié)果表明：計算結(jié)果包括特征荷載值、撓度的發(fā)展趨勢、最大變形均比試驗結(jié)果要小,說明有限元分析對于無機聚合物混凝土材料偏于保守,計算值具有較高的保證率和安全儲備。
[Abstract]:As a new type of building material, inorganic polymer concrete has attracted the attention of researchers at home and abroad because of its rich raw materials, low price, small environmental pollution and early strength and fast hardening. In this paper, the basic mechanical properties of inorganic polymer concrete are tested, the bending behavior of inorganic polymer concrete beams is analyzed by finite element method, and the flexural behavior test and finite element analysis of bonded prestressed inorganic polymer concrete beams are carried out. The main research work and results obtained include the following aspects: 1. The basic mechanical properties of IPC40 inorganic polymer concrete, including elastic modulus, Poisson's ratio, are determined by experimental study. The stress-strain curve provides important parameters for the mechanical behavior and finite element analysis of inorganic polymer concrete specimens. 2. The finite element analysis model of inorganic polymer concrete beams is established by ANSYS. At the same time, the bond-slip constitutive model is introduced to analyze the characteristic load value and its judgment criterion, load-deflection curve, spring bond stress and crack shape distribution of inorganic polymer concrete beam. The numerical simulation results are compared with the experimental results. The results show that the bond-slip constitutive relation between ribbed steel bar and concrete based on the Code for Design of concrete structures is ideal for the calculation of inorganic polymer concrete beams through the selection of relevant elements and the setting of parameters. The overall stiffness of the model considering bond-slip is reduced to some extent, and the limit load is smaller than the value without considering bond-slip. The development of mid-span deflection is closer to the experimental results. 3. The flexural behavior of three prestressed inorganic polymer concrete beams and one prestressed ordinary concrete beam under static load is studied. The results show that the whole process of prestressing inorganic polymer concrete beams is similar to that of normal prestressed concrete beams, but it is relatively similar to that of prestressed inorganic polymer concrete beams. The deflection of prestressed concrete beams under various loads develops faster and the cracks develop more rapidly. The average cracking load of three prestressed inorganic polymer concrete beams is 230 KN, which is larger than that of normal prestressed concrete beams, and the ultimate load value is close to that of normal prestressed concrete beams. The numerical simulation results for the bonded prestressed inorganic polymer concrete beams show that the calculated results include the characteristic load values and the development trend of deflection. The maximum deformation is smaller than that of the test results, which indicates that the finite element analysis is conservative for inorganic polymer concrete materials, and the calculated value has a higher guarantee rate and safety reserve.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU528

【參考文獻】

相關期刊論文 前10條

1 王作虎;杜修力;詹界東;鄧宗才;;預應力FRP筋混凝土梁的非線性有限元分析[J];玻璃鋼/復合材料;2010年02期

2 王晴;吳梟;吳昌鵬;;新型節(jié)能無機礦物聚合建筑材料研究概況[J];建筑節(jié)能;2006年06期

3 趙衛(wèi)平;肖建莊;;帶肋鋼筋與混凝土間粘結(jié)滑移本構(gòu)模型[J];工程力學;2011年04期

4 劉哲,胡東,劉志忠;礦渣粉煤灰混凝土[J];公路;1995年02期

5 袁鴻昌,江堯忠;地聚合物材料的發(fā)展及其在我國的應用前景[J];硅酸鹽通報;1998年02期

6 張景富;丁虹;代奎;孫超;;礦渣-粉煤灰混合材料水化產(chǎn)物、微觀結(jié)構(gòu)和性能[J];硅酸鹽學報;2007年05期

7 許名鑫;鄭文忠;;火災下預應力混凝土梁板非線性分析[J];哈爾濱工業(yè)大學學報;2006年04期

8 王剛,馬鴻文,任玉峰,馮武威,丁秋霞;利用粉煤灰制備礦物聚合材料的實驗研究[J];化工礦物與加工;2004年05期

9 何蒙;;地質(zhì)聚合物混凝土綜合耐久性試驗[J];黑龍江科技信息;2011年10期

10 范飛林;許金余;李為民;楊進勇;翟毅;;礦渣-粉煤灰基地質(zhì)聚合物混凝土的基本性能研究[J];混凝土;2008年06期

相關博士學位論文 前1條

1 何盛東;機制砂混凝土及其預應力梁受力性能研究[D];鄭州大學;2012年

相關碩士學位論文 前1條

1 余天起;預應力CFRP筋混凝土梁延性性能試驗研究[D];同濟大學;2006年

，

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