本文主要研究内容
作者孟琪（2019）在《不同含水率下类岩石材料短时蠕变力学特性研究》一文中研究指出：本文主要通过水泥砂浆研究不同含水率下类岩石材料蠕变特性。首先对水泥砂浆试件进行处理,将试件烘干后分为6组,分别对6组试件进行不同时间的浸泡,以取得不同的含水率,将试件擦干后称重并密封保存。根据单轴压缩试验结果确定加载等级,每次加载2h,若试件未发生破坏其应力加载等级增加2MPa,采用SAW-2000型微机控制电液伺服岩石三轴试验机对不同含水率的6组水泥砂浆试件进行单轴压缩蠕变试验,据此得到蠕变试验曲线,并分析蠕变试验曲线的蠕变量与蠕变比、蠕变速率以及蠕变劲度模量。通过透反射偏光显微镜对单轴压缩试验所得到的破坏试件进行宏观及细观上的破坏形态分析。根据单轴压缩蠕变试验结果,选用博格斯模型,对试验数据进行拟合,得到含水率对水泥砂浆的蠕变模型参数影响及其变化规律,得到不同含水率对水泥砂浆的蠕变本构关系的影响,同时通过FLAC3D软件对拟合出来的蠕变本构关系参数进行验证。（1）通过对破坏的试件进行宏观和细观的观察,在持续荷载的作用下,试件具有非常明显的压酥现象,水泥砂浆内部的不均性,导致水泥砂浆内部存在许多软弱面,在长期持续荷载的作用下,原生软弱面不断发展,逐渐在试件的内部形成贯穿整个试件的裂缝,导致试件发生破坏。（2）混凝土主断裂面的粗糙程度随着含水率的增高而逐渐降低,随着含水率的减小,在放大100倍的情况下,分形维数依次减小1.45%,-0.27%,0.80%,1.05%,1.03%;放大400倍时,分形维数依次减小1.08%,0.93%,1.28%,1.05%,1.61%;放大600倍时,分形维数依次减小1.08%,0.93%,1.28%,1.05%,1.61%。说明试件中的水分会促进内部的水化反应,对于试件的蠕变破坏起到了促进的作用,从细观层次证明随着含水率增高水泥砂浆试件的脆性降低。（3）通过单轴压缩蠕变试验得到的不同含水率水泥砂浆试件的蠕变试验曲线基本一致,完整的包括了蠕变的三个阶段。（4）通过对不同含水率的单轴分级加载短时蠕变试验结果进行分析,当加载等级相同时,水泥砂浆的蠕变量蠕变比以及蠕变速率均与水泥砂浆的含水率呈正相关,而蠕变劲度呈负相关。其中,随含水率的降低,蠕变量依次降低30.68%、52.41%、39.76%、34.22%、40.15%,而蠕变比依次降低3.97%、12.28%、10.39%、36.25%、44.23%,此趋势说明水泥砂浆经过浸泡后其内部孔隙水含量增高,对于水泥砂浆中各成分起到润滑作用,导致各组分之间的粘结度降低,随着含水率的增大,各成分之间的联系越来越小,导致水泥砂浆试件的塑性增加,其脆性随之降低;水泥砂浆的蠕变速率与含水率成正比,在第一阶预设荷载作用下,蠕变速率随含水率的降低依次降低82.21%,40.15%,46,13%,61.05%,46.24%,说明随着含水率的增加,水泥砂浆抵抗变形的能力逐渐减弱;而蠕变劲度模量则随含水率的增高而降低。通过对蠕变量与蠕变比、蠕变速率以及蠕变劲度模量四个与蠕变特性相关的重要参数分析,表明含水率对水泥砂浆的蠕变起促进作用,随着含水率的升高,蠕变特性逐渐增强。（5）对相同含水率不同加载等级的单轴蠕变试验结果进行分析,随着加载等级的升高,蠕变量、蠕变比及蠕变速率是呈先降低后增加的趋势,说明水泥砂浆试件抵抗瞬时塑性变形的能力增强,即表现出硬化现象,随着加载等级的继续提高出现了软化现象。（6）根据单轴分级加载短时蠕变试验结果,选用博格斯模型对不同含水率水泥砂浆试件的蠕变本构关系进行拟合,在加载等级相同时,随着含水率的增加,博格斯模型的弹黏性参数都呈现一定规律的变化:水泥砂浆的弹性模量与含水率成反比,说明水泥砂浆的刚度随着含水率的增加呈降低趋势;水泥砂浆的粘滞系数与含水率成反比,同样说明水泥砂浆粘性的降低,同时通过FLAC3D软件对于博格斯模型进行模拟,证明了其参数是可靠的。
Abstract
ben wen zhu yao tong guo shui ni sha jiang yan jiu bu tong han shui lv xia lei yan dan cai liao ru bian te xing 。shou xian dui shui ni sha jiang shi jian jin hang chu li ,jiang shi jian hong gan hou fen wei 6zu ,fen bie dui 6zu shi jian jin hang bu tong shi jian de jin pao ,yi qu de bu tong de han shui lv ,jiang shi jian ca gan hou chen chong bing mi feng bao cun 。gen ju chan zhou ya su shi yan jie guo que ding jia zai deng ji ,mei ci jia zai 2h,re shi jian wei fa sheng po huai ji ying li jia zai deng ji zeng jia 2MPa,cai yong SAW-2000xing wei ji kong zhi dian ye ci fu yan dan san zhou shi yan ji dui bu tong han shui lv de 6zu shui ni sha jiang shi jian jin hang chan zhou ya su ru bian shi yan ,ju ci de dao ru bian shi yan qu xian ,bing fen xi ru bian shi yan qu xian de ru bian liang yu ru bian bi 、ru bian su lv yi ji ru bian jin du mo liang 。tong guo tou fan she pian guang xian wei jing dui chan zhou ya su shi yan suo de dao de po huai shi jian jin hang hong guan ji xi guan shang de po huai xing tai fen xi 。gen ju chan zhou ya su ru bian shi yan jie guo ,shua yong bo ge si mo xing ,dui shi yan shu ju jin hang ni ge ,de dao han shui lv dui shui ni sha jiang de ru bian mo xing can shu ying xiang ji ji bian hua gui lv ,de dao bu tong han shui lv dui shui ni sha jiang de ru bian ben gou guan ji de ying xiang ,tong shi tong guo FLAC3Druan jian dui ni ge chu lai de ru bian ben gou guan ji can shu jin hang yan zheng 。（1）tong guo dui po huai de shi jian jin hang hong guan he xi guan de guan cha ,zai chi xu he zai de zuo yong xia ,shi jian ju you fei chang ming xian de ya su xian xiang ,shui ni sha jiang nei bu de bu jun xing ,dao zhi shui ni sha jiang nei bu cun zai hu duo ruan ruo mian ,zai chang ji chi xu he zai de zuo yong xia ,yuan sheng ruan ruo mian bu duan fa zhan ,zhu jian zai shi jian de nei bu xing cheng guan chuan zheng ge shi jian de lie feng ,dao zhi shi jian fa sheng po huai 。（2）hun ning tu zhu duan lie mian de cu cao cheng du sui zhao han shui lv de zeng gao er zhu jian jiang di ,sui zhao han shui lv de jian xiao ,zai fang da 100bei de qing kuang xia ,fen xing wei shu yi ci jian xiao 1.45%,-0.27%,0.80%,1.05%,1.03%;fang da 400bei shi ,fen xing wei shu yi ci jian xiao 1.08%,0.93%,1.28%,1.05%,1.61%;fang da 600bei shi ,fen xing wei shu yi ci jian xiao 1.08%,0.93%,1.28%,1.05%,1.61%。shui ming shi jian zhong de shui fen hui cu jin nei bu de shui hua fan ying ,dui yu shi jian de ru bian po huai qi dao le cu jin de zuo yong ,cong xi guan ceng ci zheng ming sui zhao han shui lv zeng gao shui ni sha jiang shi jian de cui xing jiang di 。（3）tong guo chan zhou ya su ru bian shi yan de dao de bu tong han shui lv shui ni sha jiang shi jian de ru bian shi yan qu xian ji ben yi zhi ,wan zheng de bao gua le ru bian de san ge jie duan 。（4）tong guo dui bu tong han shui lv de chan zhou fen ji jia zai duan shi ru bian shi yan jie guo jin hang fen xi ,dang jia zai deng ji xiang tong shi ,shui ni sha jiang de ru bian liang ru bian bi yi ji ru bian su lv jun yu shui ni sha jiang de han shui lv cheng zheng xiang guan ,er ru bian jin du cheng fu xiang guan 。ji zhong ,sui han shui lv de jiang di ,ru bian liang yi ci jiang di 30.68%、52.41%、39.76%、34.22%、40.15%,er ru bian bi yi ci jiang di 3.97%、12.28%、10.39%、36.25%、44.23%,ci qu shi shui ming shui ni sha jiang jing guo jin pao hou ji nei bu kong xi shui han liang zeng gao ,dui yu shui ni sha jiang zhong ge cheng fen qi dao run hua zuo yong ,dao zhi ge zu fen zhi jian de nian jie du jiang di ,sui zhao han shui lv de zeng da ,ge cheng fen zhi jian de lian ji yue lai yue xiao ,dao zhi shui ni sha jiang shi jian de su xing zeng jia ,ji cui xing sui zhi jiang di ;shui ni sha jiang de ru bian su lv yu han shui lv cheng zheng bi ,zai di yi jie yu she he zai zuo yong xia ,ru bian su lv sui han shui lv de jiang di yi ci jiang di 82.21%,40.15%,46,13%,61.05%,46.24%,shui ming sui zhao han shui lv de zeng jia ,shui ni sha jiang di kang bian xing de neng li zhu jian jian ruo ;er ru bian jin du mo liang ze sui han shui lv de zeng gao er jiang di 。tong guo dui ru bian liang yu ru bian bi 、ru bian su lv yi ji ru bian jin du mo liang si ge yu ru bian te xing xiang guan de chong yao can shu fen xi ,biao ming han shui lv dui shui ni sha jiang de ru bian qi cu jin zuo yong ,sui zhao han shui lv de sheng gao ,ru bian te xing zhu jian zeng jiang 。（5）dui xiang tong han shui lv bu tong jia zai deng ji de chan zhou ru bian shi yan jie guo jin hang fen xi ,sui zhao jia zai deng ji de sheng gao ,ru bian liang 、ru bian bi ji ru bian su lv shi cheng xian jiang di hou zeng jia de qu shi ,shui ming shui ni sha jiang shi jian di kang shun shi su xing bian xing de neng li zeng jiang ,ji biao xian chu ying hua xian xiang ,sui zhao jia zai deng ji de ji xu di gao chu xian le ruan hua xian xiang 。（6）gen ju chan zhou fen ji jia zai duan shi ru bian shi yan jie guo ,shua yong bo ge si mo xing dui bu tong han shui lv shui ni sha jiang shi jian de ru bian ben gou guan ji jin hang ni ge ,zai jia zai deng ji xiang tong shi ,sui zhao han shui lv de zeng jia ,bo ge si mo xing de dan nian xing can shu dou cheng xian yi ding gui lv de bian hua :shui ni sha jiang de dan xing mo liang yu han shui lv cheng fan bi ,shui ming shui ni sha jiang de gang du sui zhao han shui lv de zeng jia cheng jiang di qu shi ;shui ni sha jiang de nian zhi ji shu yu han shui lv cheng fan bi ,tong yang shui ming shui ni sha jiang nian xing de jiang di ,tong shi tong guo FLAC3Druan jian dui yu bo ge si mo xing jin hang mo ni ,zheng ming le ji can shu shi ke kao de 。
论文参考文献
论文详细介绍
论文作者分别是来自山东农业大学的孟琪，发表于刊物山东农业大学2019-07-05论文，是一篇关于水泥砂浆论文,含水率论文,分级加载论文,蠕变论文,博格斯模型论文,山东农业大学2019-07-05论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自山东农业大学2019-07-05论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：水泥砂浆论文; 含水率论文; 分级加载论文; 蠕变论文; 博格斯模型论文; 山东农业大学2019-07-05论文;