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Presentation final

  1. 1. 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
  2. 2. Outline of The Presentation <ul><li>Introduction </li></ul><ul><li>Objectives </li></ul><ul><li>Literature Review </li></ul><ul><li>Finite Element Modeling </li></ul><ul><li>Results </li></ul><ul><li>Conclusion </li></ul>
  3. 3. Beam-Column joint should be proportioned to resists forces at critical sections. Introduction
  4. 4. Objective <ul><li>Exterior RCC Column and Beam Joint Modeling by Finite Element. </li></ul><ul><li>Effect of beam depth on moment of the beam-column joint. </li></ul><ul><li>Study of Moment-Rotation (M-Φ) Relation. </li></ul>
  5. 5. Literature Review <ul><li>Bond-slip of reinforcement in joints- Russo, Zingone and Romano (1990) </li></ul><ul><li>Effect of inelastic cycle loading on high-strength RC connections –Alameddine and Ehsani (1991) </li></ul><ul><li>RC frames subjected to lateral loads-Qi and Pantazopopulou (1991) </li></ul>
  6. 6. FE Modeling <ul><li>Solid Geometry </li></ul><ul><li>a) Beam length from column 10 ft. </li></ul><ul><li>b) Column length from beam bottom 10 ft. </li></ul><ul><li>c) Column length from beam top 10 ft. </li></ul><ul><li>d) Beam depth 10,12 and 14 inch. </li></ul>
  7. 7. <ul><li>Modeling of concrete </li></ul><ul><li>a) Use element Plane 42 2-D. </li></ul><ul><li>b) Four nodded. </li></ul><ul><li>c) Two degrees of freedoms </li></ul><ul><li>at each node (Ux & Uy). </li></ul>
  8. 8. Modeling of concrete area. area
  9. 9. <ul><li> a) Use element Link-1 2D spar. </li></ul><ul><li>b) two degrees of freedom at each node (Ux & Uy). </li></ul><ul><li>Modeling of Reinforcements </li></ul>
  10. 10. Modeling of Reinforcement .
  11. 11. <ul><li>Modeling of Bond Slip </li></ul><ul><li>a) Use Combined 14 to model bonding between concrete and reinforcement. </li></ul>
  12. 12. <ul><li>Modeling of Mesh </li></ul><ul><li> a) Mesh Beam Column. </li></ul><ul><li> b) 12” Mesh. </li></ul>
  13. 13. Materials Properties   Materials Element types Modulus of Elasticity Poisson’s Ratio Concrete Plane 42 3000X10³ psi 0.17 Reinforcement Link1, 30000X10³psi 0.30
  14. 14. Load and Boundary Condition <ul><li>Columns end condition </li></ul><ul><li>considered fixed.Ux=0 and Uy=o </li></ul><ul><li>for both ends of column </li></ul>
  15. 15. Load and Boundary Condition <ul><li>Use Coupling between reinforcement and concrete nodes of beams top and bottom by one dof Fy. </li></ul><ul><li>Apply 5000 lb upwards from beams free end. </li></ul>
  16. 16. Result <ul><li>Deformed shape of FE Model. </li></ul>
  17. 17. Beam Depth VS Reaction Table:Finite element analysis results Beam depth (in) Load (lb) Horizontal reaction at end (lb) 10 5000 7843.30 12 5000 7843.90 14 5000 7855.00
  18. 18. 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
  19. 19. 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
  20. 20. 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
  21. 22. Conclusion <ul><li>With The Increase of Beam Depth The Moment of The Joint Increases. </li></ul>
  22. 23. Questions ?

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