Steel Beam-to-Column RBS Connections: FEM Analysis under Cyclic Loading
- 1 Department of Civil Engineering, University of Thessaly, Volos, Greece
- 2 Department of Civil Engineering, University of Thessaly, Volos, Greece
Abstract
In a companion paper [1], an optimization scheme for extended-end-plate Reduced Beam Section (RBS) connections of steel-moment-frames was presented, based on the component method of Eurocode 3, on regression analysis and on principles of Mechanics under monotone loading. European beam and column profiles were utilized, in conjunction with geometric restrictions and constraints of North American and European Standards for prequalified radius-cut RBS. Τhe aforementioned method aimed for an excellent seismic performance, the verification and validation of which is the content of the present study. Using FEM modeling and accounting for the assumptions used in the optimum design, after calibration with existing experimental data, the optimum connections were numerically analyzed under cyclic loading, adopting a well-accepted displacement-based protocol. All optimum solutions exhibited an excellent cyclic response, and met very satisfactorily all the performance criteria for seismic design. Results in terms of hysteretic M- φ curves at three characteristic areas of the connections validate the whole analysis, a fact aiming to assist in incorporation the radius-cut RBS concept in European Steel Design Codes and engineering practice.
- Sophianopoulos, D.S. and Deri, A.E. (2017) Steel Beam-to-Column RBS Connections with European Profiles: I. Static Optimization. Journal of Constructional Steel Research, 139, 101-109. https://doi.org/10.1016/j.jcsr.2017.09.028
- Sophianopoulos, D.S. and Deri, A.E. (2011) Parameters Affecting Response and Design of Steel Moment Frame Reduced Beam Section Connections: An Overview. International Journal of Steel Structures, 10, 133-144. https://doi.org/10.1007/s13296-011-2003-5
- Plumier, A. (1996) Reduced Beam Section: A Safety Concept for Structures in Seismic Zones. Transaction on Civil Engineering, Architecture, 41, 46-60.
- Pachoumis, D.T., Galoussis, E.G., Kalfas C.N. and Christitsas, A.D. (2009) Reduced Beam Section Moment Connections Subjected to Cyclic Loading: Experimental analysis and FEM Simulation. Engineering Structures, 31, 216-223. https://doi.org/10.1016/j.engstruct.2008.08.007
- Pachoumis, D.T., Galoussis, E.G., Kalfas, C.N. and Efthimiou, I.Z. (2010) Cyclic Performance of Steel Moment-Resisting Connections with Reduced Beam Sections—Experimental Analysis and Finite Element Model Simulation. Engineering Structures, 32, 2683-2692. https://doi.org/10.1016/j.engstruct.2010.04.038
- Sofias, C.E., Kalfas, C.N. and Pachoumis, D.T. (2014) Experimental and FEM Analysis of Reduced Beam Section Moment Endplate Connections under Cyclic Loading. Engineering Structures, 59, 320-329. https://doi.org/10.1016/j.engstruct.2013.11.010
- EN 1993-8 (2005) Eurocode 8: Design of Structures for Earthquake Resistance—Part 3: Assessment and Retrofitting of Buildings. Brussels.
- FEMA 355D (2000) State of the Art Report on Connection Performance. Washington DC.
- EN 1993-1-8 (2005) Eurocode 3: Design of Steel Structures—Part 1-8: Design of Joints. Brussels.
- FEMA 350 (2000) Recommended Seismic Design Criteria for New Steel Moment Frames. Washington DC.
- Rahvavard, R., Hassanipour, A. and Siapholo, N. (2015) Analytical Study of New Types of Reduced Beam Section Moment Connections Affecting Cyclic Behavior. Case Studies in Structural Engineering, 3, 33-51. https://doi.org/10.1016/j.csse.2015.03.001
- Lignos, D.G., Kolios, D. and Miranda, E. (2010) Fragility Assessment of Reduced Beam Section Moment Connections. Journal of Structural Engineering (ASCE), 136, 1140-1150. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000214