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RISS 인기검색어
- 검색키워드
- 저자 : A. Cinitha (검색결과 2 건)
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Compression Behaviour of Steel Tubular Members under Simulated Corrosion and Elevated Temperature
A. Cinitha,P. K. Umesha,G. S. Palani,V. Sampath 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.1
Studies have been carried out so as to gain an understanding of the behaviour of structural steel members exposed to different degrees of corrosion and high temperature in service. The progressive collapse and buckling characteristics of tubular members subjected to high temperature together with corrodants (localised corrosion) are presented in this paper. A microstructural analysis has been carried out so as to understand the change in mechanical and chemical properties that has been brought about in the material. The results reveal that the failure of the corroded members is attributed to localised axisymmetric imperfections imparted to the tubular members apart from loss of weight. The failure of members subjected to elevated temperature is attributed to the coarsening of the grain size.
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An Overview of Corrosion and Experimental Studies on Corroded Mild Steel Compression Members
A. Cinitha,P. K. Umesha,Nagesh R. Iyer 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.6
The performance of steel structures are strongly influenced by the damage due to corrosion, whose control is a key aspect fordesign and maintenance of both new and existing important structures. This paper presents various issues related to corrosion, typesof corrosion, chemical reactions and electrochemistry behind corrosion of steel structural elements, approaches to quantify corrosionand experimental studies on corroded coupons and compression members made of angle and tubular sections. The various corrosionmodels for structural applications are also presented, by considering the depth of corrosion along with various influencing parameters. Based on experimental studies on coupons, it is concluded that corrosion results in reduction in metal thickness followed by weightloss and reduction in mechanical strength. Galvanostatic method is adopted to corrode structural steel specimens by keeping currentas constant. The thickness loss and weight loss are the main parameters measured to quantify the amount of corrosion. From thestudies, it is concluded that for the corroded specimens, along with reduction in thickness, the geometric properties such as area,moment of inertia, radius of gyration, section modulus changes. As the corroded surface is highly irregular these changes may not belinear. Variation in slenderness ratio also noticed for corroded specimens. In effect the overall capacity of the section reduces due tocorrosion. Identifying the intensity level of corrosion such as mild, moderate and severe along with the form and location of corrosionare the other parameters discussed. A drastic reduction in mechanical properties i.e., yield and ultimate strength are observed forseverely corroded specimens.
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