Seawater sea-sand engineered/strain-hardening cementitious composites (ECC/SHCC): Assessment and modeling of crack characteristics
Seawater sea-sand engineered/strain-hardening cementitious composites (ECC/SHCC): Assessment and modeling of crack characteristics
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DOI：
10.1016/j.cemconres.2020.106292
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发表时间：
2021-02-01
影响因子：
11.4
通讯作者：
Li, Victor C.
中科院分区：
文献类型：
--
作者：
Huang, Bo-Tao;Wu, Jia-Qi;Li, Victor C.
海水海砂工程水泥基复合材料（SS-ECC）是一种新型的ECC，用于面临淡水和河砂/机制砂短缺的海洋建筑。本研究旨在评估和模拟SS-ECC的裂纹特性，这对于其与非腐蚀性钢筋的应用至关重要。探讨了海砂粒径、纤维长度和纤维掺量对SS-ECC裂缝特性的影响。提出了一种五维表示来评估SS-ECC的整体性能，通过综合考虑裂纹特性（即，裂纹宽度及其变化）和机械性能（即，压缩和拉伸性能）。提出了一个概率模型来描述裂纹宽度的随机性和演化，它可以用来估计SS-ECC上的临界拉应变为给定的裂纹宽度限制和累积概率。研究结果和建议的方法可以帮助SS-ECC在海洋和海岸结构的设计。
Seawater sea-sand Engineered Cementitious Composites (SS-ECC) is a new version of ECC for marine constructions facing the scarcity of freshwater and river/manufactured sand. This study aims to assess and model the crack characteristics of SS-ECC, which are critical for its applications with non-corrosive reinforcements. The influence of sea-sand size, fiber length and fiber dosage on the crack characteristics of SS-ECC was explored. A five-dimensional representation was proposed to assess the overall performance of SS-ECC, by comprehensively considering both the crack characteristics (i.e., crack width and its variation) and the mechanical properties (i.e., compressive and tensile properties). A probabilistic model was also proposed to describe the stochastic nature and evolution of crack width, and it can be used to estimate the critical tensile strain on SS-ECC for a given crack-width limit and cumulative probability. The findings and proposed methods can facilitate the design of SS-ECC in marine and coastal structures.