International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 05 Issue: 08 | Aug 2018
p-ISSN: 2395-0072
www.irjet.net
FATIGUE ANALYSIS OF DOUBLE CHANNEL COLD FORMED STEEL BEAM COLUMN JOINT Rakshith S L1, Nisarg Shankar S2, Dr.Puttaraju3 1P.G.
Student, Civil Engineering Department, S J B Institute of Technology, Bengaluru - 560060, Karnataka, India 2Assistant Professor, Civil Engineering Department, S J B Institute of Technology, Bengaluru - 560060, Karnataka, India 3Principal, Civil Engineering Department, S J B Institute of Technology, Bengaluru-560060, Karnataka, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – In steel construction, cold–formed structural members are becoming more popular and have a increasing importance. Its growing popularity in building construction is due to its advantages over other construction materials such as lightness and consequent ease of erection and installation, economy in transportation and handling. Even though the static behaviour of cold-formed steel elements is well established, fatigue behaviour of these elements under fluctuating loads is still uncertain. Fatigue strength is important for cold-formed steel structural members and the probability of failure by fatigue is comparable with that of other Ultimate Limit State modes of failure. Hence the prospect of using cold-formed steel sections under dynamic conditions becomes attractive. Objective of this study is to examine the performance of cold formed steel beam column joint subjected to fatigue loading. Using ANSYS software, fatigue analysis of double channel beam column - joint with a bolted and a welded connection with varying thickness (3mm and 5mm) are planned to be studied. Within bolted connection, bolts only and cleat angle connections are studied. From this study, the best connection is flange and web cleat bolted connection.
the disaster of segments from repetitive loadings could be moderated and, now and again, rejected. Undoubtedly, previous disasters from the repetitive loads had brought about disasters of parts, for example, concrete buildings, wooden structures, however the necessity for extra machines produced using metal segments in late 1800s invigorated the requirement to create outline techniques that will keep disasters from repetitive loads of a wide range of hardware. This action then concentrated from the mid of 1800s is as yet in progress today These must be utilized as a part of a predictable outline movement that might be alluded to as an exhaustion plan strategy. Clearly, if other time related disappointment methods happen associatively with repetitive loads and it collaborates generally, at that point the assignment turns out to be much all the more difficult. As much as people dependably want to utilize more products and placed more requests on the things they could plan and deliver, the test of fatigue was continually going with us. Until the early piece of 1900s, not an extraordinary arrangement was thought about the physical wellspring of fatigue. However, with the appearance of an expanded comprehension of materials, which quickened in the mid1900s, a lot of information has been produced about repeated load effects on engineering materials. The fatigue procedure has ended up being exceptionally hard to consider. In any case, broad advance on understanding the stages of fatigue has been made over the most recent 100 years or somewhere in the locality.
Key Words: Ansys, Fatigue, Cold formed steel, welded connections, Bolted Connections. 1. INTRODUCTION Fatigue is a process that causes failure or damage to the element subjected to repeated loading. Fatigue occurs when a member subjected to a repeated cyclic loading The process fatigue occurrence appears in type of cracks creating at the specific areas in the construction. Fatigue is the procedure of dynamic restricted long-term basic change happening in a member subjected to circumstances that deliver fluctuating stress and strain sooner or later (or focuses) and it finishes up in cracks or rupture after an adequate amount of variances. The invention of the fatigue happened in 1800s when various investigators in Europe watched the bridges, railroad segments are cracked under the repetitive loading. As far the century continued and utilization of metals reached out in increasing the utilization of the machines, an ever increasing number of disasters of parts exposed to repetitive loadings were documented. In mid-1800s, a scientist named A.Wohler suggested a technique in which
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2. OBJECTIVES
To determine the fatigue behaviour of double channel cold formed steel beam column joint subjected to fatigue loading.
To determine the fatigue life of double channel cold formed steel beam column joint with varying thickness. To determine the best connection of double channel cold formed steel beam column joint in both thickness.
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