Moment connections between wide flange beams and square tubular columns

1976 ◽  
Vol 3 (2) ◽  
pp. 174-185 ◽  
Author(s):  
A. Picard ◽  
Y.-M. Giroux
Keyword(s):  
Brittle Fracture ◽  
Inelastic Deformation ◽  
Design Method ◽  
Theoretical Studies ◽  
Moment Connections ◽  
Testing Program ◽  
Tubular Columns ◽  
Rigid Frames ◽  
Flange Beams ◽  
Rigid Joints

This paper presents the design and development of moment connections between wide flange beams and square tubular columns in rigid frames. The connection is effected by means of coped strap angles used to transfer stress from the beam flanges to the sides of the column. The testing program comprised 23 specimens, including two standard rigid joints introduced to give a comparison basis for the [Formula: see text] curves.The results indicate that after adequate precautions have been taken to prevent the occurrence of brittle fracture in the strap angles a connection is obtained which can develop MP and sustain appreciable inelastic deformation, making it suitable for plastically designed frames. The rigidity of the connection is less than that of a standard connection but high enough for the joint to be termed 'nearly rigid'. Preliminary theoretical studies indicate that the effect of the relative loss of rigidity on the sway behaviour of multistory frames may be significant and that P-Δ effects should be investigated.All joints considered here comprised beams of flange width equal to that of a column face.A design method is proposed in the Appendix.

Rigid framing connections for tubular columns

1977 ◽  
Vol 4 (2) ◽  
pp. 134-144 ◽  
Author(s):  
Y.-M. Giroux ◽  
A. Picard
Keyword(s):  
Brittle Fracture ◽  
Inelastic Deformation ◽  
Present Report ◽  
Design Procedure ◽  
Experimental Program ◽  
Tubular Columns ◽  
First Case ◽  
Flange Beams ◽  
Rigid Joints ◽  
Hollow Structural Sections

This paper presents the design and development of rigid framing connections between wide flange beams and tubular columns for the case where the beam flange is substantially narrower than the column face. The present report is a sequel to a previous paper dealing with a connection in which the beam flange and the column face are of equal width.In the connection proposed here the transfer of flange stress from the beam to the sides of the column is effected by means of coped strap angles while transfer of shear to the column face is done through welded double angles.The experimental program comprised 15 specimens, including 2 standard rigid joints introduced to give a comparison basis for the [Formula: see text] (moment–rotation) curves.The results indicate that, in the case of a beam flange narrower than the column face, both special attention to the geometrical design of the strap angles and provision of a web connection (not required in the first case) are necessary to ensure that brittle fracture will not take place in the strap angles. A connection is then obtained which can develop the plastic moment MP and sustain appreciable inelastic deformation and is therefore suitable for plastically-designed frames.The rigidity of the connection, slightly less than that of a standard joint to a wide flange column, makes it a 'nearly rigid' connection.Exploratory analysis of the effect of that relative loss of rigidity on the sway behaviour of multi-story frames shows that, while this influence should not be critical for frames of the height that would normally be possible with the currently-available hollow structural sections, it may be significant enough to warrant investigation of P-Δ effects.A design procedure is proposed in the Appendix.

10.14: Fire design method for eccentrically loaded concrete-filled steel tubular columns based on interaction diagrams

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 2628-2637
Author(s):  
Ana Espinós ◽  
Vicente Albero ◽  
Carmen Ibáñez ◽  
Manuel L. Romero ◽  
Antonio Hospitaler
Keyword(s):  
Design Method ◽  
Tubular Columns ◽  
Fire Design

Natural Convection - Subsea Cooling: Theory, Simulations, Experiments and Design

2011 ◽  
Author(s):  
Brian R. Gyles ◽  
Bjarte Hægland ◽  
Tine Bauck Dahl ◽  
Arnaud Sanchis ◽  
Stig Grafsro̸nningen ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Test Facility ◽  
Design Parameters ◽  
Detailed Knowledge ◽  
Extensive Literature ◽  
Theoretical Studies ◽  
Testing Program ◽  
Special Geometry ◽  
Custom Made

In many future subsea projects, there will be a requirement to cool various fluid streams, either multi-phase or single phase. To meet this need, FMC Kongsberg Subsea AS (FMC) has undertaken a project to develop a practical and robust subsea cooler. The cooler is passive in that heat is transferred to the surrounding sea water by natural convection only. Because of the subsea application, the cooler must have a special geometry to meet requirements for modularization and easy installation/removal. The passive nature of the cooler means that the flow rate of the seawater coolant is not an independent variable, but is directly linked to the cooler geometry. Developing a design method for such coolers requires detailed knowledge of the important heat transfer parameters, to an accuracy far in excess of that normally required for industrial cooler design. This problem has been approached on several levels, including an extensive literature search, theoretical studies, and model testing. One of the first observations was that little research had been done previously on this type of cooler. Much information is available for various pieces of the problem, but it became clear that designing the cooler would require significant development work. Based on the knowledge gained during the initial theoretical studies, a theory for calculating cooler performance presuming one dimensional external coolant flow has been developed. While it is clear that the actual external flow is three-dimensional, the simplified theory gives important insights into how the various design parameters affect cooler performance. To fill in the gaps in theoretical knowledge, a series of model tests designed to quantify internal and external heat transfer coefficients for the special geometry is being proposed. The testing program covers several technical areas and has required the utilization of a number of advanced measurement techniques. For the next phase of the testing program, a complete new test facility has been constructed capable of testing coolers with cross-flows typical of ocean bottom currents. The cooler development program has provided new technology which will be used to construct robust and compact subsea coolers. Because of the emphasis on basic research, fundamental knowledge and insight of the heat transfer mechanisms governing the performance of this type of cooler are acquired. This knowledge gives FMC the capability to design and manufacture subsea coolers which are custom-made to match the exact requirements of a given application.

Plastic Analysis on the Semi-Rigid Steel Frame-Composite Steel Plate Shear Wall Structure

2013 ◽  
Vol 351-352 ◽  
pp. 219-222
Author(s):  
Xiao Tong Peng ◽  
Ying Ying Hou ◽  
Lei Xia
Keyword(s):  
Steel Plate ◽  
Design Method ◽  
Shear Wall ◽  
Steel Frame ◽  
Wall Structure ◽  
Nonlinear Fem ◽  
Steel Plate Shear Wall ◽  
Plastic Analysis ◽  
Rigid Joints ◽  
Composite Steel

The semi-rigid steel frame-composite steel plate shear wall structure (SCSW) effectively improves the lateral stiffness of shear wall, making it possible to use the semi-rigid joint. In order to study the plastic failure mechanism of SCSW, a plastic model is established, in which the effects of the rotations of semi-rigid joints and yield deformations of infill steel walls on the energy consumption are considered. Based on that, a design method for the lateral ultimate strength is put forward and a nonlinear FEM model is setup using ANSYS. Through the comparison between plastic analysis results with the finite element results, it is shown that the plastic analysis method is feasible and has a safe redundancy.

scholarly journals Fire design method for concrete filled tubular columns based on equivalent concrete core cross-section

2015 ◽  
Vol 78 ◽  
pp. 10-23 ◽  
Author(s):  
Carmen Ibañez ◽  
José V. Aguado ◽  
Manuel L. Romero ◽  
Ana Espinos ◽  
Antonio Hospitaler
Keyword(s):  
Cross Section ◽  
Design Method ◽  
Concrete Core ◽  
Tubular Columns ◽  
Fire Design
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