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doi:10.3850/9789628014194_0047
Experimental Study on a Novel Self-Centering Rocking Device for Tall Buildings
Fei-Fei Sun1,2,a and Hu Cao2,b
1State Key Laboratory of Disaster Reduction of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
affsun@ tongji.edu.cn
2College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
bcaohuhu@163.com
ABSTRACT
In order to limit or eliminate large residual deformations of structures due to rocking, a novel self-centering rocking aseismic column(SCRAC) was proposed for tall buildings. The SCRAC was composed of two steel columns, a piece of steel plate shear wall(SPSW) and several post-tensioned cables (PT cables). Four specimens of one-seventh scale were tested under low cyclic axial forces and high strength long bolts were adopted in place of PT cables in the test. The experimental results indicated that SCRAC exhibited all the desirable characteristics including rocking, self-centering behavior, and energy-dissipation capability. Restoring force was provided by high-strength bolts to achieve self-centering behavior, efficiently reducing residual deformations of the column and greatly increasing tensile capacity. A simplified analytical model was proposed for the SCRAC, which could simulate test skeleton curve quite well.
Keywords: Energy-dissipation, Rocking, Self-centering, Self-centering rocking aseismic column (SCRAC).
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