【摘要】 对加入不同含量与长度的纤维红黏土压缩特性进行了三轴试验。试验结果表明,纤维红黏土强度与吸附应变能随纤维长度及含量的增加而提高,其应力应变关系曲线在某一应变水平下具有分段特性。基于上述特点,采用双曲线与直线组合表达纤维红黏土的应力应变关系。依据试验结果,通过线性与非线性拟合给出相关试验参数。基于ABAQUS有限元计算软件,建立了三轴试验的三维计算模型,并依据试验工况进行计算。数值计算结果可较好模拟试验结果,表明了所提出的纤维红黏土应力应变关系的正确性。更多还原

【Abstract】 Triaxial compressive tests were carried out on fiber reinforced laterite clay that contains various fiber contents and lengths. It was observed that increasing of fiber lengths and contents increases compressive strength and absorbed strain energy and the curves of stress-strain show a segmented feature at a certain strain level. The stress-strain curves of fiber reinforced laterite clay counld be expressed by the combination of hyperbola and straight lines,and the parameters of stress-strain curves were obtained by linear and nonlinear fitting. The three dimensional calculation model of triaxial tests was established by ABAQUS software. Based on the test cases,a large quantity of calculation was carried out for the model. There was a good consistency between the results of numerical calculations and experimental results,verifying the correctness of the proposed stress-strain relation.更多还原