Self-centering of shape memory alloy fiber reinforced cement mortar members subjected to strong cyclic loading

被引:64
作者
Shajil, N. [1 ]
Srinivasan, S. M. [1 ]
Santhanam, M. [2 ]
机构
[1] IIT Madras, Dept Appl Mech, Madras, Tamil Nadu, India
[2] IIT Madras, Dept Civil Engn, Madras, Tamil Nadu, India
关键词
SMA reinforced concrete; Superelastic effect; Self-centering; Pullout test; 3-Point bending; CONCRETE; BEHAVIOR; STEEL; BEAM;
D O I
10.1617/s11527-012-9923-1
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In addition to ductility of the reinforced concrete, it is desirable to have large recoverable deformations (self-centering ability) under strong cyclic loading conditions. Since steel reinforcement cannot regain its shape beyond yielding, the performance deteriorates enormously when subjected to a strong cyclic load. An alternative reinforcement material such as shape memory alloy (SMA) could offer scope for self-centering, thus improving performance especially after a severe loading has occurred. In this study, the load-deformation characteristics of SMA fiber reinforced cement mortar beams under cyclic loading were investigated to assess the self-centering mechanism. The study involves experiments on a beam structure and related analysis for the prediction of self-centering. Apart from the energy dissipation through its ductility, it is shown in this study that shape memory alloy reinforced cement mortar has very good self-centering properties that may be crucial in bringing back the functionality of a structure and prevention of permanent secondary deformations that may lead to catastrophic failure in some structures.
引用
收藏
页码:651 / 661
页数:11
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