Performance-based design of all-grade strain hardening cementitious composites with compressive strengths from 40 MPa to 120 MPa
Performance-based design of all-grade strain hardening cementitious composites with compressive strengths from 40 MPa to 120 MPa
复制标题
基于性能的全等级应变硬化水泥基复合材料的设计，抗压强度为 40MPa 至 120MPa
DOI：
10.1016/j.cemconcomp.2019.01.001
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发表时间：
2019-03-01
影响因子：
10.5
通讯作者：
Ding, Yao
中科院分区：
文献类型：
--
作者：
Li, Linzhi;Cai, Ziwei;Ding, Yao
本研究对从普通强度到高强度的全等级应变硬化水泥基复合材料（SHCC）的拉伸性能进行了系统研究。圆柱体试样的抗压强度范围为43 MPa 至115 MPa。采用不同的纤维体积分数和纤维长径比（纤维长度/直径）组合来研究纤维增强指数（纤维体积分数和纤维长径比的乘积）对SHCC拉伸性能（包括力学性能和裂纹模式）的影响。在所有抗压强度下建立了纤维增强指数和拉伸性能之间的关系，并与之前的实验值进行了比较。此外，提出了基于性能的设计理念，根据所需的机械和裂纹模式特性（分别对应于最终极限状态和使用极限状态）来设计SHCC。
A systematic study of the tensile properties of all-grade strain hardening cementitious composite (SHCC) from normal strength to high strength was conducted in the present research. The compressive strengths of the cylinder specimens ranged from 43 MPa to 115 MPa. Different combinations of fiber volume fractions and fiber aspect ratios (fiber length/diameter) were employed to investigate the effects of the fiber reinforcement index (the product of fiber volume fraction and fiber aspect ratio) on the tensile properties of SHCC, including mechanical properties and crack patterns. The relationships between the fiber reinforcement index and tensile properties were established at all compressive strengths and compared with the previous experimental values. Moreover, a performance-based design concept was proposed for designing SHCC based on the required mechanical and crack pattern properties, corresponding to the ultimate limit state and serviceability limit state, respectively.