Seismic control effect of friction-SMA spring hybrid energy dissipation braces in single-layer spherical lattice shell with surrounding columns

ZHUANG Peng1, 2, 3, WANG Wenting1, HAN Miao1, 2, 3,XUE Suduo4

Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (4) : 99-109.

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (4) : 99-109.

Seismic control effect of friction-SMA spring hybrid energy dissipation braces in single-layer spherical lattice shell with surrounding columns

  • ZHUANG Peng1, 2, 3, WANG Wenting1, HAN Miao1, 2, 3 , XUE Suduo4
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Abstract

A new type of hybrid energy dissipation device termed as friction-shape memory alloy (SMA) spring device (FSD) is presented in this investigation. This hybrid device consists of friction component and large-scale superelastic SMA helical springs. Based on the mechanical models of SMA spring and frictional force model, a restoring force model for the FSD is developed. The proposed FSD devices are used as energy dissipation brace (Friction-SMA spring Brace, FSB) for seismic control of a single-layer spherical lattice shell with surrounding columns. By using the ABAQUS software, the FE model of the complete structure is established and the dynamic elasto-plastic analysis under multi-dimensional seismic excitations is carried out. The displacement response, acceleration response, equivalent plastic strain and energy response of the roof and the supporting structure in the controlled and uncontrolled lattice shells are compared and analyzed. The results indicate that the FSB devices in the substructure of the lattice shell roof provide full hysteresis loops that benefit for energy dissipation. Under strong earthquakes, the energy dissipation of the controlled structure mainly depends on the SFB, which reduces plastic development and seismic damage. In addition, the FSB devices exhibit superior seismic control effect of the horizontal response to that of the vertical response of the lattice shell roof and its supporting structure.
 

Key words

single-layer spherical lattice shell / seismic control / hybrid energy dissipation brace / dynamic elasto-plastic analysis / seismic response

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ZHUANG Peng1, 2, 3, WANG Wenting1, HAN Miao1, 2, 3,XUE Suduo4. Seismic control effect of friction-SMA spring hybrid energy dissipation braces in single-layer spherical lattice shell with surrounding columns[J]. Journal of Vibration and Shock, 2018, 37(4): 99-109

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