（1 新疆建设职业技术学院建筑学院， 乌鲁木齐 830026； 2 长安大学建筑工程学院， 西安 710061；3 机械工业勘察设计研究院有限公司， 西安 710043）

［摘要］通过对生土块材在不同加载速率下进行单轴抗压试验，研究了生土材料抗压强度，弹性模量以及峰值应变随加载速率的变化规律，结果表明：当加载速率处于1～3mm/min时，生土材料表现出相对稳定的抗压特性，其抗压强度与弹性模量均随加载速率的增加先增大后减小，峰值应变随加载速率的增加逐渐减小。以切线模量的变化来量度试块的损伤，分析了生土试块损伤的演化规律和临界损伤应力随加载速率的变化规律。研究表明：随加载速率的增加，试块临界损伤应力呈先增大后减小的趋势，在相同的应力比条件下，试块的损伤随加载速率的变化规律不明显。

［关键词］生土材料； 抗压强度； 加载速率； 损伤

中图分类号：TU521-3文献标识码：A文章编号：1002-848X(2019)15-0122-04

Study on loading rate effect on uniaxial compressive properties of raw earth material

Cheng Yulan1, Wang Yihong2, Lan Guanqi2, Wang Yan3

（1 School of Architecture, Xingjiang Vocation & Technical College of Construction, Urumchi 830026, China;  2 School of Civil Engineering,  Chang′an University,  Xi′an 710061, China;  3 China Jikan Research Institute of Engineering Investigations and Design,  Co., Ltd., Xi′an 710043, China）

Abstract:Through uniaxial compressive tests of raw soil blocks at different loading rates, the variation of compressive strength, modulus of elasticity and peak strain with loading rates was studied. The results show that when loading rates are between 1mm/min and 3mm/min, raw soil materials exhibit relatively stable compressive properties, compressive strength and elasticity modulus increases first and then decreases with the increase of loading rate, and the peak strain decreases with the increase of loading rate. The damage of the test block was measured by the change of tangent modulus. The evolution of damage and the variation of critical damage stress with loading rate were analyzed. The results show that the critical damage stress increases first and then decreases with the increase of loading rate. Under the same stress ratio, the change of damage with loading rate is not obvious.

Keywords:raw earth material; compressive strength; loading rate; damage

作者简介：程玉兰，学士，副教授，Email:1554270070@qq.com。