بررسی استحکام کششی وصله های جوشی میلگرد های فولادی

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد سازه، گروه مهندسی عمران، واحد رودهن، دانشگاه آزاد اسلامی، رودهن، ایران

2 استادیار، گروه مهندسی متالورژی و مواد، واحد رودهن، دانشگاه آزاد اسلامی، رودهن، ایران

3 استادیار، گروه مهندسی عمران، واحد رودهن، دانشگاه آزاد اسلامی، رودهن، ایران

4 دانشجوی دکتری سازه، گروه مهندسی عمران، واحد رودهن، دانشگاه آزاد اسلامی، رودهن، ایران

10.22065/jsce.2020.198377.1930

چکیده

با توجه به نیاز روز افزون به استفاده از میلگرد در ساختمان سازی، تلاش های زیادی برای بهینه کردن مصرف آن انجام شده است. یکی از روش های کاهش مصرف میلگرد استفاده از وصله جوشی به جای وصله پوششی است. با وجود این، در آیین نامه بتن ایران تنها به کلیات وصله جوشی اشاره شده و هیچ ضابطه ای برای نحوه انجام وصله ارائه نشده است. از این رو، هدف از این تحقیق بررسی مقاومت کششی میلگردهای دارای وصله جوشی با پیکربندی های مختلف است. برای این منظور میلگردهای با قطر 10، 14، 18، 22 و 25 با انواع الگوهای هم پوشانی منقطع و پیوسته توسط جوش کاری با الکترود E6013 به یکدیگر متصل شدند. سپس مقاومت کششی میلگردهای متصل شده توسط آزمایش کشش به دست آمد. در ادامه به کمک نرم افزار آباکوس و با روش تولد و مرگ المان، انواع الگوهای وصله، مدل شده و نتایج به دست آمده با نتایج آزمایشگاهی مقایسه شد. نتایج حاکی از آن است که وصله جوشی بهینه،جوش منقطع با طول جوش 5d می باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of Tensile Strength of Welded Splices of Steel Bars

نویسندگان [English]

  • Pouyan Ashrafpour 1
  • Mohsen Adabi 2
  • Ehsan Darvishan 3
  • Siyavash Moeini 4
1 M.Sc. Student, Department of Civil Engineering, Roudehen branch, Islamic Azad University, Roudehen, Iran
2 Assistant Professor, Department of Metallurgy and Materials Engineering, Roudehen branch, Islamic Azad University, Roudehen, Iran
3 Assistant Professor, Department of Civil Engineering, Roudehen branch, Islamic Azad University, Roudehen, Iran
4 Ph.D. Student, Department of Civil Engineering, Roudehen branch, Islamic Azad University, Roudehen, Iran
چکیده [English]

Due to the increasing need to use rebar in construction, many efforts have been made to optimize its use. One way to reduce rebar usage is to use welded splice instead of overlap splice. However, the Iranian Concrete Code only refers to the welded splice generalities and there are no rules on how to splice. Therefore, the purpose of this study is to investigate the tensile strength of welded splice bars with different configurations. For this purpose, rebars with diameters of 10, 14, 18, 22 and 25 were connected to each other by a variety of discontinuous and continuous overlap patterns by welding with the E6013 electrode. Then the tensile strength of the connected rebars was obtained by tensile test. Then, with Abaqus software and the birth and death method, a variety of splice patterns were modeled and the results were compared with laboratory results. The results show that the optimum welded splice is the model with discontinuous weld with a weld length of 5d.

کلیدواژه‌ها [English]

  • Overlap Joint
  • Welded joint
  • Discontinuous Welding
  • Modeling
  • ABAQUS
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