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1. MD. SHOFIKUR RAHMAN ID# 071055046
2. MD. SHAMIM HOSSAIN ID# 071054046
3. ALI AHSAN HABIB ID# 071053046
4. M. AMINUL ISLAM HOWLADER ID# 071097046
Finite Element Modeling of Reinforced Concrete Beam Column Joint.
Presented By
Outline of The Presentation
Introduction Objectives Literature Review Finite Element Modeling Results Conclusion
Beam-Column joint should be proportioned to resists forces at critical sections.
Introduction
Objective
Exterior RCC Column and Beam Joint Modeling by Finite Element.
Effect of beam depth on moment of the beam-column joint.
Study of Moment-Rotation (M-Φ) Relation.
Literature Review
Bond-slip of reinforcement in joints- Russo, Zingone and Romano (1990)
Effect of inelastic cycle loading on high-strength RC connections –Alameddine and Ehsani (1991)
RC frames subjected to lateral loads-Qi and Pantazopopulou (1991)
FE Modeling
Solid Geometry
a) Beam length from column 10 ft.
b) Column length from beam bottom 10 ft.
c) Column length from beam top 10 ft.
d) Beam depth 10,12 and 14 inch.
Modeling of concrete
a) Use element Plane 42 2-D.
b) Four nodded.
c) Two degrees of freedoms
at each node (Ux & Uy).
Modeling of concrete area.
area
a) Use element Link-1 2D spar.
b) two degrees of freedom at each
node (Ux & Uy).
Modeling of Reinforcements
Modeling of Reinforcement.
Modeling of Bond Slip
a) Use Combined 14 to model bonding between concrete and reinforcement.
Modeling of Mesh
a) Mesh Beam Column. b) 12” Mesh.
Materials Properties
MaterialsElement
typesModulus of Elasticity
Poisson’s Ratio
Concrete Plane 423000X10³ psi
0.17
ReinforcementLink1,
30000X10³psi 0.30
Load and Boundary Condition
Columns end condition considered fixed.Ux=0 and
Uy=o for both ends of column
Load and Boundary Condition
Use Coupling between reinforcement and concrete nodes of beams top and bottom by one dof Fy.
Apply 5000 lb upwards from beams free end.
Result
Deformed shape of FE Model.
Beam depth(in)
Load (lb)
Horizontal reaction at end (lb)
10 5000 7843.3012 5000 7843.9014 5000 7855.00
Beam Depth VS Reaction
Table:Finite element analysis results
Table: RESULTS FROM FE ANALYSIS
Rotation Deg.
(Φ)
Beam 10
Reaction (lb)
length (in)
Moment (k-in)
2 16944 120 2033
4 33928 120 4071
6 50993 120 6119
8 68180 120 8182
10 85569 120 10268
Table: RESULTS FROM FE ANALYSIS
Rotation Deg.
(Φ)
Beam 12
Reaction (lb)
length (in)
Moment (k-in)
2 25809 120 3097
4 51680 120 6202
6 77674 120 9321
8 103850 120 12462
10 130340 120 15641
Table: RESULTS FROM FE ANALYSIS
Rotation Deg.
(Φ)
Beam 14
Reaction (lb)
length (in)
Moment (k-in)
2 35376 120 4245
4 70836 120 8500
6 106470 120 12776
8 142350 120 17082
10 178650 120 21438
Conclusion
With The Increase of Beam Depth The Moment of The Joint Increases.
Questions ?
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