全珊瑚海水混凝土单轴受压应力-应变全曲线试验研究
发布时间：2019-05-22 09:28
【摘要】：采用等应力循环加卸载法和等应变单调加载法,对棱柱体试件进行单轴受压试验获得全珊瑚海水混凝土的应力-应变全曲线,并对两种加载方法进行对比分析。试验结果表明:全珊瑚海水混凝土裂纹贯穿珊瑚骨料继续发展,单轴受压试件的破坏为脆性破坏,典型破坏状态主要为劈裂破坏,其主斜裂缝的倾角θ在65°~70°之间;残余应力与峰值应力的比值在0.292~0.525之间,说明全珊瑚海水混凝土破坏后仍具有较高的残余强度,破坏后强度逐步降低,具有一定的延性;不同强度等级全珊瑚海水混凝土的应力-应变全曲线的上升段趋势基本相似,但是随着强度等级提高,下降段的下降趋势越陡,破坏程度越剧烈;在相同强度等级下,全珊瑚海水混凝土比普通混凝土和轻集料混凝土的脆性更强。
[Abstract]:The stress-strain curves of all coral seawater concrete were obtained by uniaxial compression test of prism specimens by equal stress cyclic loading and unloading method and equal strain monotone loading method, and the two loading methods were compared and analyzed. The experimental results show that the crack of all coral seawater concrete continues to develop through coral aggregate, the failure of uniaxial compression specimen is brittle failure, the typical failure state is mainly split failure, and the inclination angle of the main oblique crack is between 65 掳and 70 掳. The ratio of residual stress to peak stress is between 0.292 and 0.525, which indicates that the whole coral seawater concrete still has high residual strength after failure, and the strength decreases gradually after failure, and has certain ductility. The upward trend of stress-strain curve of all coral seawater concrete with different strength grades is basically similar, but with the increase of strength grade, the steeper the downward trend of the descending section is, the more severe the damage degree is. Under the same strength grade, the brittleness of all coral seawater concrete is stronger than that of ordinary concrete and lightweight aggregate concrete.
【作者单位】： 南京航空航天大学土木工程系;青海大学土木工程学院;中国人民解放军理工大学爆炸冲击防灾减灾国家重点实验室;海军工程设计研究院;
【基金】：国家自然科学基金项目(51508272,51678304) 国家重点基础研究发展计划项目(2015CB655102)
【分类号】：TV431
本文编号：2482846
[Abstract]:The stress-strain curves of all coral seawater concrete were obtained by uniaxial compression test of prism specimens by equal stress cyclic loading and unloading method and equal strain monotone loading method, and the two loading methods were compared and analyzed. The experimental results show that the crack of all coral seawater concrete continues to develop through coral aggregate, the failure of uniaxial compression specimen is brittle failure, the typical failure state is mainly split failure, and the inclination angle of the main oblique crack is between 65 掳and 70 掳. The ratio of residual stress to peak stress is between 0.292 and 0.525, which indicates that the whole coral seawater concrete still has high residual strength after failure, and the strength decreases gradually after failure, and has certain ductility. The upward trend of stress-strain curve of all coral seawater concrete with different strength grades is basically similar, but with the increase of strength grade, the steeper the downward trend of the descending section is, the more severe the damage degree is. Under the same strength grade, the brittleness of all coral seawater concrete is stronger than that of ordinary concrete and lightweight aggregate concrete.
【作者单位】： 南京航空航天大学土木工程系;青海大学土木工程学院;中国人民解放军理工大学爆炸冲击防灾减灾国家重点实验室;海军工程设计研究院;
【基金】：国家自然科学基金项目(51508272,51678304) 国家重点基础研究发展计划项目(2015CB655102)
【分类号】：TV431
【相似文献】
相关期刊论文 前10条
1 李静;王林富;刘震;姜琳;刘虎;;再生大骨料混凝土单轴受压本构关系[J];低温建筑技术;2011年01期
2 肖建庄;杜江涛;;不同再生粗集料混凝土单轴受压应力-应变全曲线[J];建筑材料学报;2008年01期
3 杨木秋,林泓;混凝土单轴受压受拉应力-应变全曲线的试验研究[J];水利学报;1992年06期
4 徐传枝;王旭光;马卉;;应变率下混凝土单轴受压本构关系试验研究[J];山西建筑;2012年05期
5 李祚华;李安;滕军;;基于能量的混凝土单轴受压塑性损伤本构模型[J];土木工程学报;2012年S2期
6 安占义;郑山锁;谢明;刘彬;;混凝土单轴受压统一随机损伤本构关系[J];土木工程学报;2010年S2期
7 陈朝晖;黄河;颜文涛;翟运琼;;腐蚀混凝土单轴受压力学性能研究[J];华中科技大学学报(自然科学版);2008年03期
8 阿肯江·托呼提;沙吾列提·拜开依;曹耿;;土坯砌体单轴受压本构模型研究[J];工程力学;2012年12期
9 王凤武,楼梦麟,徐人平,张立翔,王时越;混凝土单轴受压强度可靠度与置信度研究[J];四川建筑科学研究;2004年02期
10 陈伟;彭刚;周寒清;;单轴受压状态下的混凝土力学特性研究[J];四川建筑科学研究;2014年01期
相关硕士学位论文 前1条
1 卜靖;不同含水率红砂岩单轴受压状态下超声波参数变化规律研究[D];中国矿业大学;2016年
，本文编号：2482846
本文链接：https://www.wllwen.com/kejilunwen/shuiwenshuili/2482846.html
