New materials for isolators in civil infrastructures: stainless steel-metallic pseudo rubber and SMA-metallic pseudo rubber

Chenxi Mao; Suchao Li; Yagebai Zhao; Hui Li; Jinping Ou

doi:10.1117/12.880370

13 April 2011 New materials for isolators in civil infrastructures: stainless steel-metallic pseudo rubber and SMA-metallic pseudo rubber

Chenxi Mao, Suchao Li, Yagebai Zhao, Hui Li, Jinping Ou

Author Affiliations +

Proceedings Volume 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011; 79810Q (2011) https://doi.org/10.1117/12.880370
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

Base isolation has been widely investigated and used in civil infrastructures all over the world. However, it still has some problems need to be solved. For example, extra buffers are needed for some types of isolators to prevent them from generating too large deformation. These buffers increase the cost of isolators and make them more complicated. In addition, some isolators may have residual deformation and need to be repaired or replaced after large earthquake. This also induces large cost. In order to develop novel isolators with self buffer and with residual deformation self-recovery ability, two types of materials, stainless steel metallic pseudo-rubber (SS-MPR) and shape memory alloy metallic pseudo-rubber (SMA-MPR), were fabricated and investigated in this study. Mechanical behaviors of these two materials were investigated, together with deformation self-recovery ability of SMA-MPR material. Meanwhile, three types of SMA-MPR specimens with various processing procedures were fabricated. Mechanical behavior of the SS-MPR and SMA-MPR specimens under cyclic sinusoidal compression loadings with various loading frequencies were test. After that, the three types of SMA-MPR specimens with residual deformation were put into a temperature controlled stove and their deformation recovery ability were tested. In order to address if these SMA-MPR specimens still have stable mechanical properties after deformation recovery, they were installed in the test machine and their stress-strain behavior under cyclic sinusoidal loads were tested again. Experimental results indicated that both SS-MPR and SMA-MPR are good potential material to develop novel seismic isolators for civil infrastructures.

Citation Download Citation

Chenxi Mao, Suchao Li, Yagebai Zhao, Hui Li, and Jinping Ou "New materials for isolators in civil infrastructures: stainless steel-metallic pseudo rubber and SMA-metallic pseudo rubber", Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79810Q (13 April 2011); https://doi.org/10.1117/12.880370

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KEYWORDS

Shape memory alloys

Optical isolators

Earthquakes

Smart materials

Temperature metrology

Control systems

Heat treatments

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