首页|Multi-stage superelastic variable stiffness pendulum isolation system for seismic response control of bridges under near-fault earthquakes

Multi-stage superelastic variable stiffness pendulum isolation system for seismic response control of bridges under near-fault earthquakes

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  • NETL
  • NSTL
  • Wiley
To improve the resilient capability of bridges, a novel multi-stage superelasticvariable stiffness pendulum isolator (SVSPI) is developed by incorporatingsuperelastic shape memory alloy (SMA) with the multi-stage variable stiffnesspendulum isolator (VSPI), which featured with the favorable adaptabilityunder service conditions and near-fault excitations. Based on OpenSees platform,the numerical model for novel multi-stage superelastic variable stiffnesspendulum isolator is created. A fractional factor based design method issuggested for parameter optimization of the multi-stage superelastic variablestiffness pendulum isolator. The example bridges with the novel isolators aredesigned to conduct the seismic mitigation investigation under near-faultearthquakes. The effectiveness of the novel superelastic multi-stage variablestiffness pendulum isolator and suggested design method is further discussedby case study. Results show that the novel multi-stage superelastic variablestiffness pendulum isolator designed by the proposed fractional factor baseddesign method can perform the dual control of the isolator residual displacement,girder displacement, and base forces in piers for bridges. The effectivenessof the multi-stage superelastic variable stiffness pendulum isolator withthe optimal parameters is demonstrated by case study. The technical achievementscan provide reliable basis for structural resilience enhancement andpotential structural applications.

bridgevariable stiffness pendulum isolatorsuperelasticityoptimal designseismic mitigation efficiencynear-fault earthquake

Wenzhi Zheng、Ping Tan、Yanhui Liu、Hao Wang、Huating Chen

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School of Civil Engineering, GuangzhouUniversity, Guangzhou, China,Key Laboratory of EREM & SS ofMinistry of Education, GuangzhouUniversity, Guangzhou, China

Key Laboratory of EREM & SS ofMinistry of Education, GuangzhouUniversity, Guangzhou, China

Key Laboratory of C & PC Structures ofMinistry of Education, SoutheastUniversity, Nanjing, China

2022

10.1002/stc.3114

Structural control and health monitoring

Structural control and health monitoring

EI
ISSN：1545-2255
年,卷(期)：2022.29(12)
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