IJE TRANSACTIONS C: Aspects Vol. 31, No. 6 (June 2018) 1158-1166   

downloaded Downloaded: 0   viewed Viewed: 99

R. Orangi, H. Mansourian and K. Bina
( Received: November 03, 2017 – Accepted: March 09, 2018 )

Abstract    Recently, steel structures have been accounted for a large percentage of buildings due to their advantages such as higher execution speed and easier construction. In steel structures, welded joints are commonly used and their quality plays a key role in stability of buildings under applied loads. Hence, to increase resiliency of welded steel structures against natural hazards, welded joints quality should be improved. In this article, a statistical study was done on welding defects of different connections in 50 welded steel buildings that were being constructed in district 12 of Mashhad, Iran. The reasons for selecting this district were high rates of construction and high potential of hazards. Actually, initial information about joints importance and weld defects were collected by distributed questionnaires among building designer engineers and weld inspectors. In this paper, Expert Choice software was used to prioritize weld defects in different connections of the buildings and define management solutions to improve them based on Analytic Hierarchy Process. The priority results revealed that in the non-rigid connections crater, slag inclusion and spatter are more critical whereas in the rigid connections Lack of Penetration and Lack of Fusion are more critical than the other welding defects in steel building structures.


Keywords    weld defects, weld defects management, steel structures, Analytic Hierarchy Process


References    Jianlin, S., Bruce, R., Ellingwood, M., “Seismic reliability of special moment steel frames with welded connections”, ASCE, (2012).Charles, W., Roeder, M., “Connection performance for seismic design of steel moment frames”, ASCE, (2002).Liao, T.W., “Classification of welding flaw types with fuzzy expert systems”, Industrial and Manufacturing Systems Engineering Department, Louisiana State University, Elsevier Science, (2003). Binnur, G.K., Seçil, E., “Prediction of fracture behavior of steel beam-to-column connections with weld defect using the SINTAP”, Dokuz Eylul University, Department of Mechanical Engineering, Bornova, Izmir, Turkey, (2005), Engineering Structures 27, page no. 760–768.Cerit, M., Kokumer, O., Genel. K., “Stress concentration effects of undercut defect and reinforcement metal in butt welded joint”, Mechanical Engineering Department, Sakarya University, Adapazari, Turkey. Engineering Failure Analysis 17, (2010), page no. 571–578. Zhang, J., Dong, P., “Residual stresses in welded moment frames and implications for structural performance”. Journal of structural engineering 126, (2000), page no. 306-315.Mahin, S.A., “Lessons from damage to steel buildings during the Northridge earthquake”, Department of Civil and Environmental Engineering, University of California, Berkeley, (1998), CA 94720.Dubina, D., Stratan, A., “ Behavior of welded connections of moment resisting frames beam-to-column joints”, Engineering Structures 24, (2002), page no. 1431–1440. Finch, D.M., Burdekin, F.M., “ Effects of welding residual stresses on significance of defects in various types of welded joint”, Engineering fracture mechanics, (1992).Azuma, K., Kurobane, Y., Makino, Y., “Cyclic testing of beam-to-column connections with weld defects and assessment of safety of numerically modeled connections from brittle fracture”, Engineering Structures 22, (2000), page no. 1596–1608.Rafiee, R., Mahiny, A.S., Khorasani, N., Darvishsefat, A., Danekar, A., “Simulating urban growth in Mashad City, Iran through the SLEUTH model (UGM)”, ELSEVIER cited 26, (2009), page no. 19-26. Motagh, M., Djamour, Y., Walter, T.R., Weetzel, H., Zschau, J., Arabi, S., “Land subsidence in Mashhad Valley, northeast Iran: results from InSAR, levelling and GPS”, Geophys. J. Int  168, (2007), page no. 518–526.Dehghani, M., Valazadeh Zoej, M.J., Saatchi, S., Biggs, J., Parsons, B., Wright, T., “Radar interferometry time series analysis of Mashhad subsidence”, J. Indian Soc. Remote Sens 37, (2009), page no. 147–156.Alaknanda., Anand, R.S., Kumar, P., “Flaw detection in radiographic weld images using morphological approach”, NDT&E International 39, (2006), page no. 29–33.Bartlett, J., Kotrlik, J., Higgins, CH., “Determining appropriate sample size in survey research”, Information technology, learning and performance journal, (2001).Ishizaka, A., Labib, A., “Analytic Hierarchy Process and Expert Choice: Benefits and limitations”, (2009).L.Saaty, T., “Decision making with the analytic hierarchy process”, Int. J. Services Sciences, Vol. 1, No. 1, (2008). Al-Subhi Al-Harbi, K.M., “Application of the AHP in project management”, International Journal of Project Management 19, (2001), page no. 19-27.Bitarafan, M., Hashemkhani Zolfani, S., Arefi, S.L., Zavadskas, E.K., “Evaluating the construction methods of cold-formed steel structures in reconstructing the areas damaged in natural crises, using the methods AHP

International Journal of Engineering
E-mail: office@ije.ir
Web Site: http://www.ije.ir