Experimental and numerical investigation of a new reduced beam section moment connection

The unpredictability of the steel beam welding connection has led to many solutions, including the are of focus for this research Reduced Beam Section ( Moment Connections The RBS in steel moment connection facilitates the calculation and predictability of failure in design The RBS section is created by cutting out part of the flanges in a beam This creates a plastic hinge where the beam will fail first 1 This creates a model of predictability on the durability and strength of the beams Creating a RBS connection increases the overall ductility of the steel frame The RBS section reduces the flange width which causes stress concentration on the reduced section and this then lowers the stress on the welds. The lower stress then prevents unexpected brittle fracture in the welding a predicted plastic deformation of the RBS section during a seismic event 2 3 The research is focused on optimizing the RBS connection Finite models will be created using ANSYS to investigate how different RBS connections react in different situations and what is the most efficient design in terms of safety and cost.

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RBS moment connection analysis using a solid model

10.32920/ryerson.14635773.v1 ◽

2021 ◽

Author(s):

Mikaela Coello-Mena

Keyword(s):

Seismic Event ◽

Plastic Hinge ◽

Efficient Design ◽

Moment Connections ◽

Reduced Beam Section ◽

Moment Connection ◽

Steel Moment Connection ◽

Cutting Out ◽

Beam Section ◽

Rbs Connections

The unpredictability of the steel beam welding connection has led to many solutions, including the are of focus for this research Reduced Beam Section ( Moment Connections The RBS in steel moment connection facilitates the calculation and predictability of failure in design The RBS section is created by cutting out part of the flanges in a beam This creates a plastic hinge where the beam will fail first 1 This creates a model of predictability on the durability and strength of the beams Creating a RBS connection increases the overall ductility of the steel frame The RBS section reduces the flange width which causes stress concentration on the reduced section and this then lowers the stress on the welds. The lower stress then prevents unexpected brittle fracture in the welding a predicted plastic deformation of the RBS section during a seismic event 2 3 The research is focused on optimizing the RBS connection Finite models will be created using ANSYS to investigate how different RBS connections react in different situations and what is the most efficient design in terms of safety and cost.

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Study of steel moment connection with and without reduced beam section

Case Studies in Structural Engineering ◽

10.1016/j.csse.2014.04.001 ◽

2014 ◽

Vol 1 ◽

pp. 26-31 ◽

Cited By ~ 17

Author(s):

Ajay Kulkarni Swati ◽

Vesmawala Gaurang

Keyword(s):

Reduced Beam Section ◽

Moment Connection ◽

Steel Moment Connection ◽

Beam Section

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Experimental Investigation of Reduced Beam Section Moment Connections without Continuity Plates

Earthquake Spectra ◽

10.1193/1.1814369 ◽

2004 ◽

Vol 20 (4) ◽

pp. 1185-1209 ◽

Cited By ~ 1

Author(s):

Chris P. Pantelides ◽

Yasuteru Okahashi ◽

Lawrence D. Reaveley

Keyword(s):

Steel Buildings ◽

Moment Frames ◽

Moment Connections ◽

Steel Moment Frame ◽

Reduced Beam Section ◽

Panel Zone ◽

Moment Connection ◽

Beam Section ◽

Rbs Connections ◽

Continuity Plates

The AISC 2002 Seismic Provisions for Structural Steel Buildings recommend that usage and sizing of beam flange continuity plates across the column web shall be based on tests. The Recommended Seismic Design Criteria for New Steel Moment-Frame Buildings ( FEMA-350) state that unless project-specific testing is performed to demonstrate that continuity plates are not required, moment-resisting connections should be provided with continuity plates when the thickness of the column flange is below a minimum value. One of the preferred moment connections for seismic-resistant steel frames is the reduced beam section (RBS) moment connection, which has performed well under cyclic loads in laboratory testing. To demonstrate the effectiveness of the RBS moment connection without continuity plates in the panel zone, a series of four full-scale tests of exterior beam-column connections was carried out. All materials were A572 Grade 50 steel; the beams were W30×132, two of the assemblies used W14×283 columns, and the other two used W18×211 columns. The beams were welded to the columns using complete joint-penetration welds. All four tests demonstrated that the RBS connections without continuity plates developed a total interstory drift angle greater than 0.04 radians and met the requirements for special moment frames.

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