【作者】 熊伟；

【导师】 甘元初；

【作者基本信息】 南华大学 ， 土木工程（结构工程）， 2017， 硕士

【摘要】 随着工业发展和人民生活水平的提高,废弃玻璃积累也越来越多,而这些废弃玻璃只有小部分可以回收利用,绝大部分都是以掩埋的方式处理,这不仅占用了宝贵的土地资源,同时又给环境问题造成了负担,因此对其进行科学的处理与利用刻不容缓。研究学者们通过不断的探索研究已经找到了很多解决废玻璃利用难的方法:如将废玻璃用于生产建筑材料、混凝土等等。目前,比较高效的办法是将废玻璃应用于混凝土中,其相关的研究已有了很大的进展,且主要集中在废玻璃替代粗细骨料上的研究,而对于将废玻璃磨成粉用作混凝土掺合料的相关研究,特别是在具体结构上的研究还少之又少。本文通过相关试验研究及参考已有研究成果,总结了废玻璃粉混凝土的基本力学性能和耐久性两方面的性能表现,并通过集中荷载作用下的6根钢筋混凝土梁的受剪试验,重点探讨废玻璃粉掺量和混凝土强度对钢筋混凝土梁的受力与变形性能的影响,即在钢筋混凝土梁构件中通过掺入不同比例的废玻璃粉来替代同体积的水泥,并通过变化混凝土强度等级,来对比不同试件的破坏形式、斜截面开裂荷载、极限荷载、应变、挠度、裂缝形态、最大斜裂缝宽度等等。试验结果表明:废玻璃粉钢筋混凝土梁的受剪破坏形态相似于普通钢筋混凝土梁;废玻璃粉钢筋混凝土梁的开裂荷载比普通钢筋混凝土梁要低;在废玻璃粉掺量相同的情况下,试件的承载力随着混凝土强度的增大而逐渐增大,跨中挠度逐渐减小;在相同混凝土强度设计等级的情况下,试件的承载力随着废玻璃粉掺量的增加而逐渐下降,跨中挠度逐渐增大。废玻璃粉钢筋混凝土梁的受剪承载力具有与普通钢筋混凝土梁相接近的计算安全性,其计算公式可以采用普通钢筋混凝土梁的受剪承载力公式。混凝土强度等级对最大斜裂缝宽度有较大的影响,随着混凝土强度等级的明显提高,能够在一定程度上限制斜裂缝宽度的发展,废玻璃粉钢筋混凝土梁的最大斜裂缝宽度随着废玻璃掺量的增加而逐渐增大;基于试验结果与相关理论,推导出了集中荷载作用下的钢筋混凝土梁最大斜裂缝宽度计算公式。更多还原

【Abstract】 With the development of the industry and the improvement of people’s living standards,the accumulation of waste glass is more and more,and only a small part of these waste glass can be recycled,most of them are buried in the way,which not only takes up valuable Land resources and environmental problems caused by the burden,so its scientific treatment and use is urgent.researchers have found a lot of ways to solve the difficult use of waste glass through continuous exploration and research: such as the use of waste glass for the production of building materials,concrete production and so on.At present,the more efficient way is to apply waste glass to concrete,its related research has made great progress,and mainly concentrated in the waste glass instead of coarse aggregate on the study.There are few studies on the use of waste glass into powder as a concrete admixture,especially in specific structural studies.In this paper,the basic mechanical properties and durability of waste glass powder concrete are summarized by some related experiments and reference to previous research results.Through the shear test of six reinforced concrete beams under concentrated load,this paper studies the influence on the stress state and deformation of the reinforced concrete beam exerted by the mixed waste-glass-powder quantity and concrete strength.through Mixed with different proportions of waste glass powder to replace the same volume of cementand by changing the concrete strength,to compare the failure modes of different specimens,the diagonal cracking load,ultimate load,strain,deflection,crack diagonal width,etc.Experimental results showed that: the shear failure mode of the waste-glass-powder reinforced concrete beams is similar to that of ordinary reinforced concrete beams;the cracking load of waste-glass-powder reinforced concrete beams is lower than the ordinary reinforced concrete beams;under the condition mixing the same quantity of waste-glass-powder,samples’ shear bearing capacity increaseswith the increase of concrete strength,while the mid-span deflection decreases gradually;but at the same concrete strength design level,the shear bearing capacity of specimen decreases with the increase of the mixed waste-glass-powder amount,and the mid-span deflection increases accordingly.The shear bearing capacity of the waste-glass-powder reinforced concrete beams possesses the similar calculation security with these ordinary reinforced concrete beamsandit can be calculated by the formula used to calculate the shear bearing capacity of ordinary reinforced concrete beams.concrete strength has a great influence on the the diagonal crack width,and with the increase of concrete strength,the samples’ diagonal crack width will be limited.the diagonal crack width of reinforced concrete beams increases with the increase of the mixed waste-glass-powder amount.Based on the experimental results and related theories,a formula which can be used to calculate the diagonal crack width of reinforced concrete beams has been given out.更多还原