Structural Engineering and Mechanics

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Energy-based damage-control design of steel frames with steel slit walls

  • Ke, Ke (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Chen, Yiyi (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University)
  • Received : 2013.08.19
  • Accepted : 2014.07.26
  • Published : 2014.12.25
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Abstract

The objective of this research is to develop a practical design and assessment approach of steel frames with steel slit walls (SSWs) that focuses on the damage-control behavior to enhance the structural resilience. The yielding sequence of SSWs and frame components is found to be a critical issue for the damage-control behavior and the design of systems. The design concept is validated by the full-scale experiments presented in this paper. Based on a modified energy-balance model, a procedure for designing and assessing the system motivated by the framework regarding the equilibrium of the energy demand and the energy capacity is proposed. The damage-control spectra constructed by strength reduction factors calculated from single-degree-of-freedom systems considering the post stiffness are addressed. A quantitative damage-control index to evaluate the system is also derived. The applicability of the proposed approach is validated by the evaluation of example structures with nonlinear dynamic analyses. The observations regarding the structural response and the prediction during selected ground motions demonstrate that the proposed approach can be applied to damage-control design and assessment of systems with satisfactory accuracy.

Keywords

Acknowledgement

Supported by : National Science Foundation of China

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