Response sensitivity studies of a cable-stayed bridge with shape memory alloy damping system considering temperature effects

2021 ◽  
Vol 244 ◽  
pp. 112772
Author(s):  
Ning Zhang ◽  
Ruijie Chang ◽  
Quan Gu
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Temperature Effects ◽  
Response Sensitivity ◽  
Cable Stayed Bridge ◽  
Sensitivity Studies

Experimental Analysis of Smart Structure with Damping Treatment and SMA

1996 ◽  
Vol 459 ◽  
Author(s):  
Q. Chen ◽  
J. Ma ◽  
C. Levy
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Temperature Effects ◽  
Loss Factor ◽  
Alloy Layer ◽  
Smart Structure ◽  
Viscoelastic Layer ◽  
Heat Cycling ◽  
Damping Materials ◽  
System Frequency

ABSTRACTThe experimental results of a flexible cantilever beam with constrained viscoelastic layer and shape memory alloy layer called smart damping treatment (SDT) are presented. The upper side of the beam is bonded with a viscoelastic layer and then covered with a constraining layer. The lower side is bonded with a shape memory alloy layer, which is used as an actuator. The elastic modulus and loss factor of damping materials are functions of the temperature. The temperature effects on system frequency and loss factor due to heat cycling of SMA layer are evaluated here. It is found that temperature plays an important role on system frequency and loss factor, and thus the temperature effects must be included when discussing such an structure.

Limit state behavior and response sensitivity analysis of endplate steel connections with shape memory alloy bolts

2020 ◽  
Vol 31 (18) ◽  
pp. 2071-2087
Author(s):  
Majid Mohammadi Nia ◽  
Saber Moradi
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Numerical Study ◽  
Slenderness Ratio ◽  
Limit State ◽  
Local Buckling ◽  
Limit States ◽  
Response Sensitivity ◽  
Cyclic Response ◽  
Steel Connections

Shape memory alloys have been used in developing self-centering steel moment connections. This article presents a numerical study aiming at evaluating the cyclic response sensitivity and limit states of extended endplate steel connections with shape memory alloy bolts. Three-dimensional finite element models are developed and validated against a recent experimental study. Using a statistical design-of-experiment method, the effects of 21 design factors and their interactions on the cyclic response of shape memory alloy connections are assessed. The sensitivity of six response parameters is studied. In addition, four limit states for shape memory alloy connections are discussed, including beam local buckling, bolt excessive axial strain, endplate yielding, and column flange yielding. Results show that endplate thickness, shape memory alloy bolt diameter, beam web slenderness ratio, and shape memory alloy maximum transformation strain are the most influential factors. Furthermore, endplate yielding is found to be the governing limit state in almost 80% of the analyzed connections, whereas shape memory alloy bolt excessive strain and column flange yielding are observed in less than 20% and 5% of the connections, respectively. Beam local buckling is not governing in the analyzed shape memory alloy connections designed as per the AISC 358-16 and AISC 341-16 seismic design requirements for extended endplate connections and highly ductile members.

Structure and mobility of martensite variant interfaces in a Cu-Zn-AI shape memory alloy

2003 ◽  
Vol 112 ◽  
pp. 519-522 ◽  
Author(s):  
W. Cai ◽  
J. X. Zhang ◽  
Y. F. Zheng ◽  
L. C. Zhao
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Martensite Variant
Sign in / Sign up

Export Citation Format

Share Document