本文選題：水工混凝土　切入點(diǎn)：加載速率　出處：《建筑材料學(xué)報(bào)》2017年04期

【摘要】：首先研究了混凝土在自由吸水條件下的飽和度演化規(guī)律,然后對(duì)5種濕度狀態(tài)下的混凝土進(jìn)行了5種抗壓加載速率下的單軸壓縮試驗(yàn)和5種劈裂抗拉加載速率下的劈裂抗拉試驗(yàn),最后建立了不同飽和度混凝土的抗壓強(qiáng)度、劈裂抗拉強(qiáng)度隨加載速率變化的預(yù)測(cè)公式,并分解了自由水與加載速率的獨(dú)立效應(yīng).結(jié)果表明:相同加載速率下混凝土試件的抗壓強(qiáng)度與劈裂抗拉強(qiáng)度均隨飽和度的增加而降低;相同飽和度下混凝土試件的抗壓強(qiáng)度與劈裂抗拉強(qiáng)度均隨加載速率的提高呈近似指數(shù)關(guān)系增長(zhǎng);相同飽和度下混凝土劈裂抗拉強(qiáng)度隨加載速率的變化幅度較抗壓強(qiáng)度更為顯著.
[Abstract]:Firstly, the saturation evolution of concrete under the condition of free water absorption is studied.Then the uniaxial compression tests under five different compression loading rates and the splitting tensile tests under five splitting tensile loading rates are carried out on concrete under five different humidity conditions. Finally, the compressive strength of concrete with different saturation is established.The formula for predicting the variation of splitting tensile strength with loading rate is given, and the independent effect of free water and loading rate is decomposed.The results show that the compressive strength and splitting tensile strength of concrete specimens decrease with the increase of saturation at the same loading rate.Under the same saturation, the compressive strength and the splitting tensile strength of concrete specimens increase exponentially with the increase of loading rate, and the variation range of the splitting tensile strength of concrete with loading rate is more obvious than that of compressive strength under the same saturation.
【作者單位】： 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51379178,50779057) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(ZD2012015)
【分類號(hào)】：TU528

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本文編號(hào)：1700107