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A Study on the Behavior of Composite Concrete and Open Web Steel Joists | ||
| Engineering and Technology Journal | ||
| Article 8, Volume 38, 6A, 2020, Pages 869-878 PDF (1.38 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.30684/etj.v38i6A.575 | ||
| Authors | ||
| Marwah S. Abduljabbar* 1; Wael S. Baldawi2; Mohammed J. Hamood2 | ||
| 1Civil Engineering Department, University of Technology, Baghdad, Iraq, | ||
| 2Civil Engineering Department, University of Technology, Baghdad, Iraq | ||
| Abstract | ||
| In this research, the results of three composite open web steel joist static tests are presented along with the results of companion pushout tests. The effect of shear connection degree and span-to-depth ratio on the behavior of composite open web joists under distributed static loading is reviewed and discussed, followed by a comparison of results of the shear stud strength from push-out tests, back-calculated from the ultimate capacity of the composite joist tests, and to the provisions in the AISC, EC4, NZS, SJI, and BS5950. Specimen test results of the studied span-to-depth ratios showed that the load-deflection behavior was similar to ultimate capacity difference less than 10%, but they experienced different failure modes and deflection. And when the test results were compared based on the shear connection degree, they revealed that the composite open web joist designed with partial shear connection suffered from severe deformation and deflection accompanied with higher ultimate capacity. | ||
| Keywords | ||
| Composite open web joists; Push-out test; Headed studs; Shear connection degree | ||
| References | ||
|
[1] Z. Andalib P. Caputo S. Dorafshan M. Maguire W. Collins, “Investigation into the behavior of an open web steel joist bridge,” International Bridge Conference, At National Harbor, USA, 18, 64, 2018. [2] H. Robinson, “Tests on composite beams with cellular deck,” 1967. [3] J.T. Mottram and R.P. Johnson, “Push tests on studs welded through profiled steel sheeting,” University of Warwick, Department of Engineering, 1989. [3] J. Bonilla L. M Bezerra R. Larrúa Quevedo C. A. Recarey Morfa and E. Mirambell Arrizabalaga “Study of stud shear connectors behaviour in composite beams with profiled steel sheeting,” Revista de la construcción, 14(3), 47-54, 2015. [4] S. J. Yanez D. W. Dinehart and S. Santhanam “Composite steel joist analysis using experimental stiffness factor from push-out tests,” Journal of Constructional Steel Research, 137, 1-7, 2017. [5] F. X. Ding G. A. Yin H. B. Wang L. Wang and Q. Guo “Static behavior of stud connectors in bi-direction push-off tests,” Thin-Walled Structures, 120, 307-318, 2017. [6] F. Hadeed L. K. Al-Hadithy and R. J. Aziz “Experimental investigation on behavior of composite open web steel joists,” Al-Nahrain Journal for Engineering Sciences, 21, 3, 393-404, 2018. [7] ANSI, B. “AISC 360-16, specification for structural steel buildings.” Chicago, IL: American Institute of Steel Construction, 2016. [8] EN, B., 1994. “Design of composite steel and concrete structures. General rules and rules for buildings BSI,” 1-1:2004 Eurocode 4. 1994. [9] Standard, N.Z. “Standards New Zealand, steel structures standard,” Part 1, 1997. [10] SJI “Standard specification for CJ-series composite steel joists,” 2015. [11] BS 5950-3.1: “Structural use of steelwork in buildings,” Part 3: Section 3.1: Code of Practice for Design of Simple and Continuous Composite Beams, British Standards Institution: London, 1990. [12] BS 5400-5:2005 “Steel, concrete and composite bridges,” Code of practice for design of composite bridges, 2005. [13] Iraqi Standard Specification No.5, “Portland cement,” Central Agency for Standardization and Quality Control, Baghdad, 1984. [14] Iraqi Standard Specification No.45, “Natural aggregate resources used in concrete and construction,” Central Agency for Standardization and Quality Control, Baghdad, 1984. [15] ASTM A. 370, “Standard test methods and definitions for mechanical testing of steel products,” Annual Book of Standard, 2005. [16] H. M. Azmi, “Composite open-web trusses with metal cellular floor,” Doctoral dissertation, McMaster University, 1972. | ||
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