改性土体材料单轴受压本构关系研究

Researches on Modified Raw-Soil Materials Constitutive Relation Subject to Uniaxial Compression

生土材料的本构关系是分析生土建筑抗震性能及倒塌机理的重要手段之一,也是对生土建筑结构进行数值模拟的前提.通过强度试验确定粗砂及麦秸秆这两种改性材料的最优掺量后,对同尺寸的素土试块及掺和了粗砂和麦秸秆的生土材料试块进行了单轴压缩试验,得到应力-应变曲线后,用有理式和混凝土规范提出的单轴本构方程分别去拟合实验实测点.建立了改性生土材料单轴本构方程.

Researching constitutive relation of raw-soil materials is not noly an important method to analyze its seismic performance and collapse mechanism, but also the premise of numerical simulation. The optimum additives（coarse and straw） was confirmed by strength test. Three groups of samples, namely the raw-soil cubics, coarse-cubits and straw-cubits, were tested by uniaxial compression, then, the stress——strain curves was fitted by the rational function and the constitutive equation given by Code for design of concrete structures. Uniaxial constitutive equations of the modified raw-soil materials was proposed.