（新疆大学建筑工程学院， 乌鲁木齐 830047）

［摘要］针对土坯这一具有拉压不同模量的材料进行试验研究，讨论土坯砖和泥浆试块的拉压力学性能受尺寸效应的影响。试验结果显示，生土材料制备的土坯砖具有较明显的拉压不同模量性质，且受到尺寸效应的影响。根据试验数据选取合适的屈服准则，通过屈服包络面分析尺寸效应对土坯材料强度的影响。其结果表明，生土材料在掺和麦秸秆纤维后在抗压弹性模量上受尺寸效应影响较小，但抗拉弹性模量依然存在较明显的尺寸效应。

［关键词］土坯； 拉压不同模量； 尺寸效应； 屈服准则

中图分类号：TU313， TU361文献标识码：A文章编号：1002-848X(2020)02-0082-05

Experimental study on tensile and compressive mechanical properties of adobe brick and mud specimens

Yuan Fang, Hushitaer Niyaze, Zhao Zhiyue, Wei Lingling

(College of Architecture Engineering, Xinjiang University, Urumqi 830047, China)

Abstract:The experimental study was conducted on the adobe materials with different tension-compression modulus to discuss the influence of size effect on the mechanical properties of adobe brick and mud specimens. The experimental results show that adobe brick made of earth has obvious properties of different tension-compression modulus, and is affected by size effect. According to the experimental data, the appropriate yield criterion was selected, and the influence of size effect on the strength of adobe material was analyzed by the yield envelope surface. The results show that the size effect on the compressive elastic modulus of earthen materials is less when it is mixed with wheat straw fiber, but the size effect is still obvious on the tensile elastic modulus.

Keywords:adobe; different tension-compression modulus; size effect; yield criterion

*国家自然科学基金项目（51468060）。

作者简介：员方，博士研究生，Email:YF_Eva@qq.com。