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为了便于分析配筋混凝土结构的粘弹性温度应力,本文将配筋混凝土看作为一种复合材料,通过试验来测定该材料的粘弹性参数。文中采用三分点加载的方式进行了配筋混凝土小梁的室内徐变试验,并对试验数据进行了回归分析。结果表明:1. 用配筋混凝土小梁的徐变试验来测定配筋混凝土材料的粘弹性参数是可行的;2. 荷载历史是徐变减小的重要原因,在计算温度应力时,徐变系数取值要考虑这一因素;3. 在本试验配筋条件下,配筋对徐变影响很小,配筋混凝土的徐变系数与素混凝土的徐变系数近乎相等。
In order to analyze the viscoelastic temperature stress of reinforced concrete structure, reinforced concrete is considered as a kind of composite material, and the viscoelastic parameter of the material is determined through experiments. In this paper, the indoor creep test of reinforced concrete trabecular is carried out by means of one-third point loading, and the regression analysis of the test data is carried out. The results show that: 1. It is feasible to measure the viscoelastic parameters of reinforced concrete with the creep test of reinforced concrete girder. 2. The load history is an important reason for the decrease of creep. When calculating temperature stress, creep The value of coefficient should take this factor into consideration. (3) Reinforcement has little effect on creep under the condition of reinforcement in this experiment, and the creep coefficient of reinforced concrete is nearly equal to the creep coefficient of plain concrete.