Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO GSFEB:1990
• Năm ban hành / Publication date: 1990
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Guide Specifications for Fatigue Evaluation of Existing Steel Bridges
• Số trang / Page: 29

Phạm vi áp dụng / Scope of standard

Except for cover plated beams, the evaluation procedures apply
to uncracked steel members subjected to primary stresses. The
procedures do not apply to members that have sustained severe
corrosion or mechanical damage or that have been repaired after
sustaining fatigue cracking. NCHRP Report 299 gives
information and references on the fatigue behavior of such members
with fatigue prone details and on the possibility of fatigue due to
secondary bending stresses that are not normally calculated.

Cover plated beams with existing fatigue cracks at the ends of
the cover plates may be retrofitted as discussed in Article 4.6 if
the bridge is to remain in service.