PERFORMANCE OF LINK-TO-STUB BOLTED CONNECTION IN COLUMN-TREE MOMENT RESISTING FRAMES UNDER FIRE CONDITIONS

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YAHYAI MAHMOOD; REZAEIAN ABAS

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Journal: JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING Year:2015 | Volume:2 | Issue:3 Page(s): 23-33

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Information Journal Paper

Title

PERFORMANCE OF LINK-TO-STUB BOLTED CONNECTION IN COLUMN-TREE MOMENT RESISTING FRAMES UNDER FIRE CONDITIONS

Author(s)

YAHYAI MAHMOOD | REZAEIAN ABAS | Issue Writer Certificate

Keywords

EXPERIMENTAL STUDYQ2

STEEL BEAMQ1

BOLTED CONNECTIONQ2

FAILURE MODESQ2

FIREQ2

Abstract

Column-tree moment resisting frames, as the efficient shop-welded and field-bolted structural systems, are used in many countries. Very limited research has been carried out on such systems under FIRE conditions. This paper presents experimental investigations of the behavior of beam and bolted splice connections in steel column-tree moment resisting frames exposed to FIRE. Two full-scale steel sub-frames with different splice connections were tested under ISO 834 standard FIRE. The flange splice plates were configured as a single plate with single shear bolts in first specimen, and as double plates with double shear bolts in second specimen. The observation of thermal and structural FIRE behaviors including temperature histories, temperature-deflection of the beam, temperature-rotation of splice connections and FAILURE MODES were investigated. The temperature-deflection and temperature-rotation curves remained in the elastic range until about 600°C. Beyond 600°C, the behavior would be highly nonlinear plastic. The beam splice connection failed due to shear fracture of top bolts at temperatures beyond 750°C. Consequently, stub beam web failed at those temperatures because of block-shear. Using double plates with double shear bolts for flange splices would enhance the temperature resistance and rotational capacity of the beam splice connections. Both tests results confirmed that specimens retain the capacity to support the design load when the average beam temperature does not exceed 600°C. This temperature limit confirms the temperature criteria provided by ASTM E119 and ANSI/UL 263 for a restrained beam, and can be used to specify the minimum FIRE resistance criteria for beams in column-tree MRFs. The measured time-deflection curves showed that the restrained FIRE resistance rating for both unprotected specimens obtained about 15 minutes in both tests.

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APA: Copy

YAHYAI, MAHMOOD, & REZAEIAN, ABAS. (2015). PERFORMANCE OF LINK-TO-STUB BOLTED CONNECTION IN COLUMN-TREE MOMENT RESISTING FRAMES UNDER FIRE CONDITIONS. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, 2(3), 23-33. SID. https://sid.ir/paper/252594/en

Vancouver: Copy

YAHYAI MAHMOOD, REZAEIAN ABAS. PERFORMANCE OF LINK-TO-STUB BOLTED CONNECTION IN COLUMN-TREE MOMENT RESISTING FRAMES UNDER FIRE CONDITIONS. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING[Internet]. 2015;2(3):23-33. Available from: https://sid.ir/paper/252594/en

IEEE: Copy

MAHMOOD YAHYAI, and ABAS REZAEIAN, “PERFORMANCE OF LINK-TO-STUB BOLTED CONNECTION IN COLUMN-TREE MOMENT RESISTING FRAMES UNDER FIRE CONDITIONS,” JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, vol. 2, no. 3, pp. 23–33, 2015, [Online]. Available: https://sid.ir/paper/252594/en

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