摘要(Abstract)：
针对沙漠砂可发性聚苯乙烯混凝土应用于路基及边坡工程时受力多处于压应力且当前尚无相关研究的情况,采用分级加载方式,研究沙漠砂可发性聚苯乙烯混凝土在轴向压应力状态下的蠕变特性,建立相关的本构模型。结果表明:沙漠砂可发性聚苯乙烯混凝土在不同应力水平下的蠕变曲线表现较相似,在低应力作用下蠕变曲线表现出较明显的衰减蠕变特征,随着应力的逐渐增大,蠕变曲线开始更多地呈现出稳态蠕变特征;试块蠕变应变主要由瞬时应变及蠕变量组成,轴向瞬时应变及总应变随应力的增大而增大,蠕变量与蠕变比随应力的增大而总体呈现先减小、后增大的趋势;等时应力-应变曲线显示,沙漠砂可发性聚苯乙烯混凝土呈现较明显的非线性黏弹性特征,六参量Burgers模型可对该特性进行较好地描述。
关键词(KeyWords)： 沙漠砂可发性聚苯乙烯混凝土;本构模型;分级加载;蠕变
基金项目(Foundation): 国家自然科学基金项目(51569001,51369001)
作者(Author): 牛晟,康亚明,陈静波,刘鹏
DOI: 10.13349/j.cnki.jdxbn.20200724.001
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