http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Reliability of Corroded Steel Members Subjected to Elastic Lateral Torsional Buckling
Uzun Ertugrul Turker,Engin Aktaş 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.4
Structural steel members are subjected to corrosion due to environmental condition. As a result, there is decreasing in the cross-section properties of the member. This causes diff erent stability problems and reduction in the load carrying capacity of members. Then, the probability of failure, P f increases due to corrosion. The need arises to determine expected level of safety for such members and systems. Besides, reliability of the steel structure is also eff ected by the structural stability problems that result decreasing in the resistance. Lateral torsional buckling is one of the most encountered problems in steel members and aff ected by the critical moment which is a function of lateral and torsional stiff ness. Critical moment depends on the material properties, boundary conditions, unbraced length, load pattern, and the member’s cross section. Under the corrosion, it is inevitable to observe changing in some of properties. In this study, a damage model to determine the reliability of a corroded I-shape steel member under linear moment gradient is developed considering corrosion exposure time. Uniform and varying thickness loss models are considered to show the corrosion eff ect. Infl uence of environmental condition on the load carrying capacity of the members is considered and their eff ects on member design is evaluated. As a result, it is concluded that load carrying capacity of steel members degrades and safety of them adversely eff ected. With presented formulas, it is ensured that the load carrying capacity and reliability indices of the steel members can be calculated practically under the examined situations