Modelling of Bolted Endplate Connections Subjected to Bending Moment and Axial Force in Fire

다국어 초록 (Multilingual Abstract)

This article presents an extensive application of component based method both at ambient and elevated temperatures. The analytical model is used to predict the connection behavior, with axial force in the connected beam being superposed. The formulas for the calculation of bending moment resistance and rotation stiffness are derived in the article. At the same time, two kinds of loading paths, proportional loading and non-proportional loading, are also thoroughly investigated. A total of 12 tests, in which the connection is subjected to proportional loading path, are utilized to validate the analytical model. At the same time, a 3D Finite Element Model using the ABAQUS is also presented to verify the analytical model. As to the connection under non-proportional loading path, 6 transient fire tests are chosen to verify the proposed model. Compared to the experimental results, the accuracy of the moment-rotation curves obtained from the analytical model are acceptable. Hence, the presented analytical model can be used to predict connection behavior under fire conditions, taking the influence of axial force into account.

참고문헌 (Reference)

1 Leston-Jones, L. C., "The influence of semi-rigid connections on the performance of steel framed structures in fire" University of Sheffield 1997

2 Florian M. Block, "The development of a component-based connection element for endplate connections in fire" Elsevier BV 42 (42): 498-506, 2007

3 K.S. Al-Jabri, "Spring-stiffness model for flexible end-plate bare-steel joints in fire" Elsevier BV 61 (61): 1672-1691, 2005

4 Yiqi Gao, "Resistance of flush endplate connections under tension and shear in fire" Elsevier BV 86 : 195-205, 2013

5 Khalifa S. Al-Jabri, "Performance of beam-to-column joints in fire—A review" Elsevier BV 43 (43): 50-62, 2008

6 A.A. Del Savio, "Generalised component-based model for beam-to-column connections including axial versus moment interaction" Elsevier BV 65 (65): 1876-1895, 2009

7 Hongxia Yu, "Experimental and Numerical Investigations of the Behavior of Flush End Plate Connections at Elevated Temperatures" American Society of Civil Engineers (ASCE) 137 (137): 80-87, 2011

8 L. Chen, "Efficient modelling of large deflection behaviour of restrained steel structures with realistic endplate beam/column connections in fire" Elsevier BV 43 : 194-209, 2012

9 CEN, "EN 1993-1-2, Eurocode 3, Design of steel structures - Part 1.2: General Rules-Structural Fire Design"

10 CEN, "EN 1990-1-8, Eurocode 3 Design of steel structures - Part 1.8: Design of joints"

11 Sokol, Z., "Design of end plate joints subject to moment and normal force" 1219-1228, 2002

12 Al-Jabri, K. S., "Component-based model of the behavior of flexible end-plate connections at elevated temperatures" 66 (66): 215-221, 2004

13 Kȩstutis Urbonas, "Behaviour of semi-rigid steel beam-to-beam joints under bending and axial forces" Elsevier BV 62 (62): 1244-1249, 2006

14 Pedro Barata, "Assessment of the T-stub joint component at ambient and elevated temperatures" Elsevier BV 70 : 1-13, 2014

15 Alfonsas Daniūnas, "Analysis of the steel frames with the semi-rigid beam-to-beam and beam-to-column knee joints under bending and axial forces" Elsevier BV 30 (30): 3114-3118, 2008

16 Zhaohui Huang, "A connection element for modelling end-plate connections in fire" Elsevier BV 67 (67): 841-853, 2011

17 L Simões da Silva, "A component model for the behaviour of steel joints at elevated temperatures" Elsevier BV 57 (57): 1169-1195, 2001