- 摘 要
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（1 新疆建設職業(yè)技術(shù)學院建筑學院， 烏魯木齊 830026； 2 長安大學建筑工程學院， 西安 710061；3 機械工業(yè)勘察設計研究院有限公司， 西安 710043）
［摘要］通過對生土塊材在不同加載速率下進行單軸抗壓試驗，研究了生土材料抗壓強度，彈性模量以及峰值應變隨加載速率的變化規(guī)律，結(jié)果表明：當加載速率處于1～3mm/min時，生土材料表現(xiàn)出相對穩(wěn)定的抗壓特性，其抗壓強度與彈性模量均隨加載速率的增加先增大后減小，峰值應變隨加載速率的增加逐漸減小。以切線模量的變化來量度試塊的損傷，分析了生土試塊損傷的演化規(guī)律和臨界損傷應力隨加載速率的變化規(guī)律。研究表明：隨加載速率的增加，試塊臨界損傷應力呈先增大后減小的趨勢，在相同的應力比條件下，試塊的損傷隨加載速率的變化規(guī)律不明顯。
［關(guān)鍵詞］生土材料； 抗壓強度； 加載速率； 損傷
中圖分類號：TU521-3文獻標識碼：A文章編號：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
作者簡介：程玉蘭，學士，副教授，Email:1554270070@qq.com。
