Prestressing effect of embedded Fe-based SMA wire on the flexural behavior of mortar beams

被引：21

作者：

Choi, Eunsoo ^{[1
]}

Ostadrahimi, Alireza ^{[1
]}

Kim, Woo Jin ^{[2
]}

Seo, Junwon ^{[3
]}

机构：

[1] Hongik Univ, Dept Civil Engn, Seoul 04066, South Korea

[2] Hongik Univ, Dept Mat Sci & Engn, Seoul 04066, South Korea

[3] South Dakota State Univ, Dept Civil & Environm Engn, Brookings, SD 57006 USA

来源：

ENGINEERING STRUCTURES | 2021年 / 227卷

基金：

新加坡国家研究基金会;

关键词：

Fe-based SMA; Prestressing; Mortar beam; Flexural behavior; Recovery stress; SHAPE-MEMORY ALLOY; MARTENSITIC-TRANSFORMATION; CORROSION BEHAVIOR; RECOVERY STRESS; CONCRETE BEAMS; DEFORMATION; MICROMECHANICS; FEASIBILITY; IMPROVEMENT;

D O I：

10.1016/j.engstruct.2020.111472

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper investigates the stress recovery stress induced in the newly developed Fe-based SMA and then studies the prestressing effect of embedded Fe-SMA wires on the flexural behavior of mortar beams. To evaluate deflection variations of the beams during heating and cooling using an external heating source at the bottom, we increase the temperature in two types of reinforced and unreinforced mortar beams. Under developed prestressing force, several three-point bending tests are carried out to analyze the bending stress in the Fe-SMA reinforced specimens. Moreover, the crack propagation and failure modes of each specimen are investigated. Experimental data indicates that prestressing force can more than double the fracture deformation capacity and decrease the resultants stress by about 28% in both tensile and compressive parts of mortar beams.

引用

页数：8

共 44 条

[1] Durability design strategies for new cementitious materials [J].