An Experimental Study of Base Isolation Devices Using Shape Memory Alloy Wires

2004 ◽  
Author(s):  
Yoshitaka Yamashita ◽  
Arata Masuda ◽  
Akira Sone
Keyword(s):  
Experimental Study ◽  
Cyclic Loading ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Seismic Isolation ◽  
Base Isolation ◽  
Restoring Forces ◽  
Loading Tests ◽  
Isolation Device ◽  
Cyclic Loading Tests

In this study, we develop a base isolation device using SMA wires. Two types of SMA springs are used as softening springs, i.e. ring-type-spring (RTS) and buckling-type-spring (BTS). BTSs’ restoring forces have significant softening characteristics, which suppresses the acceleration transmissibility. Cyclic loading tests are conducted to investigate the durability of the SMA springs. The results show that they have the enough durability for seismic isolation.

230 A Base Isolation Device Using Shape Memory Alloy Wires

2003 ◽  
Vol 2003 (0) ◽  
pp. _230-1_-_230-6_
Author(s):  
Yoshitaka YAMASHITA ◽  
Arata Masuda ◽  
Akira Sone
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Base Isolation ◽  
Isolation Device

A New Constitutive Model of Superelastic SMA

2012 ◽  
Vol 204-208 ◽  
pp. 3978-3981
Author(s):  
Wen Jie Ren ◽  
Jun Sen Jia ◽  
Xiang Shang Chen
Keyword(s):  
Cyclic Loading ◽  
Constitutive Model ◽  
Shape Memory ◽  
Mechanical Parameters ◽  
Superelastic Effect ◽  
Loading Tests ◽  
Hysteretic Characteristics ◽  
Set Up ◽  
Experimental Values ◽  
Cyclic Loading Tests

The shape memory alloys (SMAs) have received increasing interest attributed to their unique superelastic effect and the shape memory effect. The existing models of superelastic SMAs are generally complex for practical use. In this paper, cyclic loading tests of superelastic SMA wires are first performed. Based on the experiments, a simple constitutive model is set up. Simulations testify that the model can approximately describe the hysteretic characteristics of the superelastic SMA and the simulated mechanical parameters agree well with the experimental values.

Experimental Study on Reinforced Concrete Framework that Reinforced by Steel Tube Concrete Wing Wall

2014 ◽  
Vol 1079-1080 ◽  
pp. 22-27
Author(s):  
Shao Wu Zhang ◽  
Geng Biao Zhang ◽  
Ying Chuan Chen
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Bearing Capacity ◽  
Steel Tube ◽  
Skeleton Curve ◽  
Ductility Factor ◽  
Loading Tests ◽  
Low Cyclic Loading ◽  
Cyclic Loading Tests

In order to verify the feasibility of a new overallseismic reinforcement method of the framework. Firstly，carried low cyclic loading tests on reinforcedconcrete framework, then reinforced the framework with a new method, and repeatthe low cyclic loading tests , finally, compared and analyzed the data from twotests. Compared with the original framework, the shape of the hysteresis curveis more full and the skeleton curve of the parallel period is longer andthe ductility factor increased by 35% and the bearing capacity increased by 40%.The results show that reinforcement framework has better energy dissipationcapacity, ductility and transgender capacity.

scholarly journals A Base Isolation Device Using Shape Memory Alloy Wires

2005 ◽  
Vol 71 (703) ◽  
pp. 768-775
Author(s):  
Yoshitaka YAMASHITA ◽  
Arata MASUDA ◽  
Akira SONE
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Base Isolation ◽  
Isolation Device

136 A Base Isolation Device Using Shape Memory Alloy Wires

2004 ◽  
Vol 2004 (0) ◽  
pp. _136-1_-_136-6_
Author(s):  
Yoshitaka Yamashita ◽  
Arata MASUDA ◽  
Akira SONE
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Base Isolation ◽  
Isolation Device

scholarly journals Experimental Study on In-Plane Seismic Performance of Reinforced Brick Walls Bonded with Mud

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Hui Wang ◽  
Jian-jun Chang ◽  
Shi-qin He ◽  
Qing-lei Zhang
Keyword(s):  
Experimental Study ◽  
Cyclic Loading ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Failure Modes ◽  
Cement Mortar ◽  
Experimental Results ◽  
Loading Tests ◽  
Low Cyclic Loading ◽  
Cyclic Loading Tests

Low-cyclic loading tests were carried on brick walls bonded with mud reinforced by three methods: packing belts, one-side steel-meshed cement mortar, and double-side steel-meshed cement mortar. The failure modes, hysteresis curves of the load-displacement, skeleton curves, and ductility were obtained. The results showed that the bearing capacity of the brick walls bonded with mud reinforced by the abovementioned three methods had been increased to 1.4, 1.7, and 2.2 times as much as that of the unreinforced brick walls, respectively, and the ductility of the reinforced brick walls had been increased to 4.7, 2.1 and 2.2 times, respectively. The integrity and ductility of the reinforced brick walls were effectively improved in different degrees. The experimental results provided specific seismic strengthening techniques for the farmhouses built with brick walls bonded with mud.

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