Cyclic constitutive model for concrete
Cyclic constitutive model for concrete
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DOI：
10.1016/j.engstruct.2007.05.005
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发表时间：
2008-03
影响因子：
5.5
通讯作者：
José Fernando Sima;P. Roca;C. Molins
中科院分区：
文献类型：
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作者：
José Fernando Sima;P. Roca;C. Molins
提出了承受压缩和拉伸循环载荷的混凝土本构模型。所提出的模型旨在改进基于弥散裂纹方法的计算程序中混凝土结构循环行为的建模。特别强调了对拉伸和压缩载荷循环产生的强度和刚度退化的描述、卸载和重新加载曲线的形状以及裂纹张开和闭合之间的过渡。引入了压缩和拉伸两个独立的损伤参数来模拟由于荷载增加而导致的混凝土退化。在循环压缩载荷的情况下，该模型是根据其他作者获得的实验结果推导出来的，考虑了循环变量与混凝土所达到的损坏水平的依赖性。在循环张力的情况下，采用基于实验观察的简单模型。所提出的本构模型的主要新颖之处在于，所有所需的输入数据都可以通过传统的单调压缩和拉伸测试获得。
A constitutive model for concrete subjected to cyclic loadings in both compression and tension is presented. The proposed model is intended to provide improvements on modelling the cyclic behaviour of concrete structures in the context of computational programs based on a smeared crack approach. Particular emphasis has been paid to the description of the strength and stiffness degradation produced by the load cycling in both tension and compression, the shape of unloading and reloading curves and the transition between opening and closing of cracks. Two independent damage parameters in compression and in tension have been introduced to model the concrete degradation due to increasing loads. In the case of cyclic compressive loading, the model has been derived from experimental results obtained by other authors by considering the dependency of the cyclic variables with the damage level attained by the concrete. In the case of cyclic tension a simple model is adopted based on experimental observations. The main novelty of the proposed constitutive model lays in the fact that all the required input data can be obtained through the conventional monotonic compression and tension tests.