Smeared-Crack Modeling of Concrete Tension Splitting
Smeared-Crack Modeling of Concrete Tension Splitting
复制标题
混凝土拉伸劈裂的弥散裂纹建模
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
A. deRoo
中科院分区：
文献类型：
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作者：
F. Vecchio;A. deRoo
混凝土的拉裂机制可以对开裂的钢筋混凝土构件的膨胀作出可测量的贡献，在某些情况下显著影响响应。基于流行的模糊裂纹概念的分析模型目前没有试图解释这种作用。对受单轴拉伸的钢筋混凝土板的试验数据进行了检验。研究发现，横向扩张的发生速率与纵向（加载）方向上的增量应变大致成正比。研究了各种可能的影响因素，并建立了初步模型。该模型被纳入一个非线性有限元算法，提供了相当准确的模拟所观察到的响应。所获得的相关性表明，在这一领域的进一步研究是值得进行的。
Concrete tension splitting mechanisms can contribute measurably to the dilatation of cracked reinforced-concrete elements, in some cases significantly affecting response. Analytical models based on the popular smeared-crack concept currently make no attempt to account for this action. Test data from reinforced-concrete panels subjected to uniaxial tension are examined. It is found that the lateral dilatation occurs at a rate roughly proportional to the incremental strains in the longitudinal (loaded) direction. Various possible influencing factors are studied, and a preliminary model is formulated. The model is incorporated into a nonlinear finite-element algorithm, providing reasonably accurate simulations of the responses observed. The correlations obtained indicate that further research in this area may be worth pursuing.