干燥及饱水状态下基于巴西劈裂法的板岩抗拉强度

发布时间：2018-01-28 09:20

本文关键词： 干燥和饱水层理角度板岩巴西劈裂试验抗拉强度　出处：《中南大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：为研究干燥及饱水状态下不同层理角度板岩的抗拉强度的相关规律,采用微机控制电液伺服万能试验机对不同层理角度的板岩试件进行巴西劈裂试验,获得其破坏荷载、饱和含水率、抗拉强度等力学参数;基于获得的力学参数分析不同状态下板岩试件抗拉强度的变化规律以及其相对应的破坏模式。研究结果表明:随着板岩试件层理角度的增加,其抗拉强度逐渐降低,饱水状态下板岩试件的抗拉强度明显低于干燥状态下板岩试件的抗拉强度,并且层理角度为0°和90°板岩试件的破坏模式为纯拉伸破坏,层理角度为30°和60°板岩试件的破坏模式为沿层面剪切破坏。
[Abstract]:In order to study the relative law of tensile strength of slate with different bedding angles under dry and saturated conditions, the Brazilian splitting test of slate specimens with different bedding angles was carried out by using a microcomputer controlled electro-hydraulic servo universal testing machine. Mechanical parameters such as failure load, saturated moisture content, tensile strength and so on are obtained. Based on the obtained mechanical parameters, the variation of tensile strength of slate specimens under different states and the corresponding failure modes are analyzed. The results show that: with the increase of bedding angle of slate specimens. The tensile strength of slate specimens decreased gradually and the tensile strength of slate specimens was obviously lower than that of slate specimens under dry condition. The failure mode of slate specimens with bedding angles of 0 掳and 90 掳is pure tensile failure, and the failure mode of 30 掳and 60 掳slate specimens with bedding angles is shear failure along the plane.
【作者单位】：中南大学资源与安全工程学院;
【基金】：国家自然科学基金资助项目(51374246,51304240) 湖南省水利厅科技项目(30227)~~
【分类号】：TU452
【正文快照】： 岩石的抗拉强度是岩石非常重要的力学参数,在岩土类工程建设中。因岩体经常处于各种应力交替存在的状态之中,如何准确地划分每种应力状态的作用范围是判定岩土工程稳定性的关键因素之一,由于岩石的抗压强度远大于其抗拉强度,故处于受拉状态下的岩石更容易被破坏,由于水对岩石

【相似文献】