砂土与混凝土接触面力学特性大型单剪试验研究

田建勃; 韩晓雷; 刘江元

doi:10.13204/j.gyjz201207018

砂土与混凝土接触面力学特性大型单剪试验研究

doi: 10.13204/j.gyjz201207018

1.
西安建筑科技大学土木工程学院西安 710055

基金项目:

国家自然科学基金项目(51108370)

详细信息

作者简介:
田建勃，男，1986年出生，硕士研究生。Email：402298872@qq.com

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- 被引次数: 0
出版历程
- 收稿日期: 2011-10-18
- 刊出日期: 2012-07-20

LARGE-SCALE SIMPLE SHEAR TEST ON MECHANICAL PROPERTIES OF INTERFACE BETWEEN SANDY SOIL AND CONCRETE FACE

1.
School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China

摘要

摘要: 利用研制的大型单剪仪,进行砂土与混凝土接触面单剪试验研究,研究单一粒径的砂土对混凝土接触面物理力学性质的影响。从试验结果分析得到,不同单一粒径砂土的接触面厚度和试样破坏时的剪切位移。试验表明:抗剪强度与法向应力呈较好的线性关系;在接触面法向应力压力较低时,剪切应力-位移关系曲线呈应变软化型;随着接触面法向应力的增高,剪切应力-位移关系曲线呈应变硬化型的趋势越明显,此时,不同单一粒径的砂土与混凝土界面剪应力-位移曲线可看成由一条曲线与一条平直线组成。接触面法向应力越低剪胀越明显;随着接触面法向应力的增大,剪胀性减弱,试样发生剪胀时的剪应力也逐渐增大。
- 大型单剪仪 /
- 力学特性 /
- 单一粒径 /
- 接触面厚度 /
- 剪胀
Abstract: A series of shear tests of interface between sandy soil and concrete face was performed by developed largescale simple shear apparatus, and the effect of different single grain sandy soil on mechanical properties of interfacewas studied. By the analysis of test results, the interface thickness and shear displacement of different single grainsandy soil were presented when the sample destroyed. It was shown that there was good linearity of shear strength andnormal stress. In the vertical stress at lower, relation curves of the shear stress and displacement showed strainsoftening; with the increase of vertical stress, the trends of relation curves of the shear stress and displacementshowed more obvious, at this time, relation curves of the shear stress and displacement of interface between differentsingle grain sandy soil and concrete face could be seen as being composed of a curve and a flat line. Lower thevertical stress dilatancy more obvious; with the increase of vertical stress, shear dilatancy weakened, and shear stresswas gradually increasing when shear dilatation appeared.
- large-scale simple shear apparatus /
- mechanical property /
- single grain /
- thickness of interface /
- shear dilatation

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参考文献(8)

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