Steel and Composite Structures

  • 제16권4호
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  • Pages.357-374
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  • 2014
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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On the optimum performance-based design of eccentrically braced frames

  • 투고 : 2013.01.13
  • 심사 : 2013.11.15
  • 발행 : 2014.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The design basis is being shifted from strength to deformation in modern performance-based design codes. This paper presents a practical method for optimization of eccentrically braced steel frames, based on the concept of uniform deformation theory (UDT). This is done by gradually shifting inefficient material from strong parts of the structure to the weak areas until a state of uniform deformation is achieved. In the first part of this paper, UDT is implemented on 3, 5 and 10 story eccentrically braced frames (EBF) subjected to 12 earthquake records representing the design spectrum of ASCE/SEI 7-10. Subsequently, the optimum strength-distribution patterns corresponding to these excitations are determined, and compared with four other loading patterns. Since the optimized frames have uniform distribution of deformation, they undergo less damage in comparison with code-based designed structures while having minimum structural weight. For further investigation, the 10 story EBF is redesigned using four different loading patterns and subjected to 12 earthquake excitations. Then a comparison is made between link rotations of each model and those belonging to the optimized one which revealed that the optimized EBF behaves generally better than those designed by other loading patterns. Finally, efficiency of each loading pattern is evaluated and the best one is determined.

키워드

참고문헌

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피인용 문헌

  1. Life-cycle cost optimization of steel moment-frame structures: performance-based seismic design approach vol.7, pp.3, 2014, https://doi.org/10.12989/eas.2014.7.3.271
  2. Performance-based design optimization using uniform deformation theory: a comparison study vol.12, pp.1, 2015, https://doi.org/10.1590/1679-78251207
  3. Effects of uncertainties on seismic behaviour of optimum designed braced steel frames vol.20, pp.2, 2016, https://doi.org/10.12989/scs.2016.20.2.317
  4. A review of research on steel eccentrically braced frames vol.128, 2017, https://doi.org/10.1016/j.jcsr.2016.07.032
  5. Semi-Active Control of Structures Equipped With MR Dampers Based on Uniform Deformation Theory 2018, https://doi.org/10.1007/s40999-017-0213-8
  6. A lateral load pattern based on energy evaluation for eccentrically braced frames vol.27, pp.5, 2014, https://doi.org/10.12989/scs.2018.27.5.623
  7. Experimental and numerical assessment of EBF structures with shear links vol.28, pp.2, 2018, https://doi.org/10.12989/scs.2018.28.2.123
  8. Direct displacement based design of hybrid passive resistive truss girder frames vol.28, pp.6, 2018, https://doi.org/10.12989/scs.2018.28.6.691
  9. Seismic performance of high strength steel frames with variable eccentric braces based on PBSD method vol.18, pp.5, 2020, https://doi.org/10.12989/eas.2020.18.5.527