Optimization of fiber volume fraction to enhance reinforcing efficiency in hybrid fiber reinforced strain hardening cementitious composite

被引：33
|
作者：
Liu, Tianan [3 ]
Yang, Yingzi [1 ,2 ,3 ]
Chen, Zhitao [1 ,2 ,3 ]
Li, Yazhao [3 ]
Bai, Ruixiang [3 ]
机构：
[1] Harbin Inst Technol, Minist Educ, Key Lab Struct Dynam Behav & Control, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disast, Minist Ind & Informat Technol, Harbin 150090, Peoples R China
[3] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China
来源：
CEMENT & CONCRETE COMPOSITES | 2020年 / 113卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Strain hardening cementitisous composites; Hybrid fiber; Pseudo-strain hardening; Performance index; Cracking saturated index; Fiber volume fraction; MULTIPLE CRACKING BEHAVIOR; MECHANICAL-PROPERTIES; HIGH-STRENGTH; FLY-ASH; PERFORMANCE; CONCRETE; DESIGN; STEEL; POLYETHYLENE; SHCC;
D O I：
10.1016/j.cemconcomp.2020.103704
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The steel fibers were generally used to improve the compressive strength of hybrid fiber reinforced strain hardening cementitious composite (SHCC) due to its higher strength and modulus. It is crucial to rationally design the volume fraction of fibers to maximize the role of different fibers in hybrid fiber reinforced SHCC. In this study, a design philosophy was proposed to guide the synthesis of hybrid fibers reinforced SHCC with saturated multiple cracking. The practical design criteria were determined by the joint use of cracking saturation index and pseudo strain hardening (PSH) performance indices. Finally, the design criteria were used to determine the volume fraction of steel fiber in hybrid fiber reinforced SHCC. Based on the proposed method, the optimum steel fiber volume fraction of 0.68% in hybrid fiber reinforced SHCC with 1.5% volume fraction of PE fibers was obtained for a designated matrix.
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页数：11
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