Steel and Composite Structures

  • 제13권4호
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  • Pages.383-396
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  • 2012
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Experimental study on ductile crack initiation in compact section steel columns

  • 투고 : 2009.10.21
  • 심사 : 2012.08.06
  • 발행 : 2012.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

In order to develop a verification method for extremely low cycle fatigue (ELCF) of steel structures, the initiation mechanism of ductile cracks is investigated in the present study, which is the first step of brittle fracture, occurred in steel bridge piers with thick-walled sections. For this purpose, a total of six steel columns with small width-thickness ratios were tested under cyclic loading. It is found that ductile cracks occurred at the column base in all the specimens regardless of cyclic loading histories subjected. Moreover, strain history near the crack initiation location is illustrated and an index of energy dissipation amount is proposed to evaluate deformation capacity of structures.

키워드

참고문헌

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  8. Predicting Ductile Crack Initiation in Steel Bridge Piers with Unstiffened Box Section under Specific Cyclic Loadings Using Detailed and Simplified Evaluation Methods vol.18, pp.9, 2015, https://doi.org/10.1260/1369-4332.18.9.1427
  9. Seismic Performance of Compact Beam–Column Connections with Welding Defects in Steel Bridge Piers vol.22, pp.4, 2017, https://doi.org/10.1061/(ASCE)BE.1943-5592.0001024
  10. Ductile crack initiation evaluation in stiffened steel bridge piers under cyclic loading vol.36, pp.4, 2012, https://doi.org/10.12989/scs.2020.36.4.463