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Temperature effects of shape memory alloys (SMAs) in damage control design of steel portal frames |
Xiaoqun LUO1, Hanbin GE2(), Tsutomu USAMI2 |
1. Department of Building Engineering, Tongji University, Shanghai 200092, China; 2. Department of Civil Engineering, Meijo University, Nagoya 468-8502, Japan |
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Abstract The objective of the present study is to analytically investigate temperature effects of an axial-type seismic damper made of shape memory alloys (SMAs) equipped in steel frames. Based on a modified multilinear one dimensional constitutive model of SMAs, two types of SMAs are employed, which have different stress plateau and different stress growth rate with temperature increase. Temperature effects of SMA dampers on seismic performance upgrading are discussed in three aspects: different environment temperatures; rapid loading rate induced heat generation and different SMA fractions. The analysis indicates that the effect of environment temperature should be considered for the SMA damper in steel frames. However, the rapid loading rate induced heat generation has little adverse effect.
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Keywords
damage control design
shape memory alloy
temperature effect
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Corresponding Author(s):
GE Hanbin,Email:gehanbin@meijo-u.ac.jp
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Issue Date: 05 December 2012
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