本文選題：低摻量橡膠混凝土 + 本構(gòu)關(guān)系模型�。� 參考：《廣東工業(yè)大學(xué)》2013年碩士論文

【摘要】：我國(guó)“十二五”規(guī)劃的綠色發(fā)展主題要求建筑業(yè)大力發(fā)展符合綠色建筑要求的新型建材及制品。我國(guó)《綠色建筑評(píng)價(jià)標(biāo)準(zhǔn)》(GB/T503782006)對(duì)“綠色建筑”要求保護(hù)環(huán)境和減少污染,最大可能使用可再生材料,循環(huán)利用建筑材料。廢舊輪胎造成了嚴(yán)重的“黑色污染”,橡膠混凝土在解決廢舊輪胎帶來的環(huán)境破壞和資源浪費(fèi)問題方面,完全符合當(dāng)今綠色建筑發(fā)展要求。目前主要把橡膠混凝土用作建筑功能材料,研究高摻量的橡膠混凝土。而作為結(jié)構(gòu)材料的橡膠混凝土則是低摻量,為了推廣橡膠混凝土在結(jié)構(gòu)工程中的應(yīng)用,低摻量橡膠混凝土的本構(gòu)關(guān)系研究是非常重要的。目前橡膠混凝土的本構(gòu)關(guān)系研究雖然已有初步的成果,但由于試驗(yàn)條件限制還有待完善。本文在對(duì)低摻量橡膠混凝土單軸受壓力學(xué)性能試驗(yàn)的機(jī)理分析研究基礎(chǔ)上,對(duì)橡膠混凝土單軸受壓本構(gòu)模型進(jìn)行了改進(jìn),并對(duì)建立的本構(gòu)模型進(jìn)行了分析和實(shí)驗(yàn)驗(yàn)證 論文采用5種橡膠摻量、5種橡膠粒徑組合的低摻量橡膠混凝土進(jìn)行單軸受壓試驗(yàn),研究分析橡膠的摻量、粒徑和摻入方式對(duì)低摻量橡膠混凝土的軸心抗壓強(qiáng)度、彈性模量、峰值應(yīng)變、極限應(yīng)變、可見裂縫的出現(xiàn)以及試件破壞形態(tài)等力學(xué)性能指標(biāo)的影響,試驗(yàn)結(jié)果表明這些力學(xué)性能指標(biāo)與橡膠的摻量、粒徑和摻入方式有密切的關(guān)系,論文對(duì)這些關(guān)系給出了相應(yīng)的機(jī)理分析。 本文采用經(jīng)驗(yàn)本構(gòu)模型的研究方法,利用最小二乘法曲線擬合以及多元非線性回歸的數(shù)學(xué)方法,根據(jù)試驗(yàn)測(cè)得的單軸受壓應(yīng)力-應(yīng)變?nèi)�建立起包括軸心抗壓強(qiáng)度、峰值應(yīng)變以及本構(gòu)參數(shù)a、b的數(shù)學(xué)表達(dá)式的低摻量橡膠混凝土單軸受壓本構(gòu)模型,本構(gòu)參數(shù)a、b與橡膠摻量、粒徑有明顯規(guī)律關(guān)系,并且參數(shù)a、b具有明確物理意義。 最后把建立的本構(gòu)模型運(yùn)用到檢驗(yàn)組試驗(yàn)和前人試驗(yàn)研究中,結(jié)果表明本構(gòu)模型具有較好預(yù)測(cè)能力和較高準(zhǔn)確度,在通用性和預(yù)測(cè)性能上得到進(jìn)一步改善提高。
[Abstract]:The green development theme of the 12th Five-Year Plan requires the construction industry to develop new building materials and products that meet the requirements of green construction. GB / T503782006) requires "green building" to protect the environment and reduce pollution, use renewable materials and recycle construction materials as far as possible. Waste tires cause serious "black pollution". Rubber concrete can solve the problems of environmental damage and waste of resources caused by waste tires, which fully meet the requirements of green building development. At present, rubber concrete is mainly used as building functional material to study rubber concrete with high content. Rubber concrete, as a structural material, is of low content. In order to popularize the application of rubber concrete in structural engineering, it is very important to study the constitutive relation of rubber concrete with low content. Although the constitutive relation of rubber concrete has been studied preliminarily, it still needs to be improved due to the limitation of test conditions. In this paper, based on the analysis and study of the mechanism of uniaxial compressive mechanical properties test of low content rubber concrete, the uniaxial compression constitutive model of rubber concrete is improved, and the established constitutive model is analyzed and verified by experiments. In this paper, the uniaxial compression test of low content rubber concrete with five kinds of rubber content and five kinds of rubber particle size combination is carried out, and the axial compressive strength and elastic modulus of low content rubber concrete are studied and analyzed. The effects of peak strain, limit strain, crack appearance and fracture morphology on the mechanical properties of rubber are studied. The test results show that these mechanical properties are closely related to the amount of rubber, particle size and mixing mode. The mechanism of these relationships is analyzed in this paper. In this paper, the empirical constitutive model is used, the least square curve fitting and the mathematical method of multivariate nonlinear regression are used to establish the axial compressive strength including axial compressive strength according to the stress-strain full curve of uniaxial compression measured by experiment. The constitutive model of low content rubber concrete under uniaxial compression for peak strain and constitutive parameter ab has obvious relationship with rubber content and particle size, and the parameter ab is of clear physical significance. Finally, the established constitutive model is applied to the test group test and previous experiments. The results show that the constitutive model has better prediction ability and higher accuracy, and the generality and prediction performance are further improved.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU528.41

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本文編號(hào)：1907190