本文選題：沖擊荷載　切入點(diǎn)：油菜秸稈灰分　出處：《湖南農(nóng)業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期

【摘要】：運(yùn)用直徑80 mm分離式霍普金森壓桿試驗(yàn)設(shè)備,研究油菜秸稈灰分摻量分別為10%、15%、20%、25%的混凝土在0.30、0.45、0.65 MPa沖擊加載氣壓下的動(dòng)態(tài)力學(xué)性質(zhì)。結(jié)果表明:油菜秸稈灰分混凝土的應(yīng)變率與試件加載氣壓呈正相關(guān)關(guān)系;峰值應(yīng)力隨加載氣壓的提高而增大,油菜秸稈灰分摻量為10%的混凝土在不同加載氣壓下的峰值應(yīng)力變化率最大,其變化率高達(dá)63.63%;在同一加載氣壓下,油菜秸稈灰分混凝土峰值應(yīng)力隨灰分摻量的增加而減小;相比對(duì)照混凝土峰值應(yīng)力,10%摻量混凝土最大,其峰值應(yīng)力大于對(duì)照混凝土,而其他摻量油菜秸稈灰分混凝土峰值應(yīng)力均低于對(duì)照混凝土,油菜秸稈灰分摻量10%的混凝土的動(dòng)態(tài)承載力最優(yōu)。
[Abstract]:The dynamic mechanical properties of rapeseed straw with 10% ash content (10%) and 25% concrete (25%) were studied by using a separate Hopkinson pressure bar with a diameter of 80 mm. The dynamic mechanical properties of the concrete under shock loading pressure of 0.30 ~ 0.45 ~ 0.65 MPa were studied.The results show that the strain rate of rape straw ash concrete is positively correlated with the loading pressure of the specimen, and the peak stress increases with the increase of the loading pressure.Under the same loading pressure, the peak stress of rape straw ash concrete decreases with the increase of ash content, and the change rate of the peak stress of the concrete with 10% of rape straw ash content under different loading pressure is the highest, and the change rate is as high as 63.63 percent, and at the same loading pressure, the peak stress of rape straw ash concrete decreases with the increase of ash content.Compared with the control concrete, the peak stress of 10% concrete was the largest, and the peak stress of the control concrete was higher than that of the control concrete, while the peak stress of the other rape straw ash concrete was lower than that of the control concrete.The dynamic bearing capacity of the concrete with 10% ash content of rape straw is optimal.
【作者單位】： 湖南農(nóng)業(yè)大學(xué)工學(xué)院;湖南省現(xiàn)代農(nóng)業(yè)裝備工程技術(shù)研究中心;
【基金】：湖南省政府重大專項(xiàng)(湘府閱[2014]35號(hào)) 湖南省教育廳青年基金項(xiàng)目(15B108)
【分類號(hào)】：TU528

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