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connections in steel structure

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connections in steel structure

  1. 1. Connections in steel structure Presentation by: Abid Qayum Reg. no: SU-13-01-079-008 Sarhad University of Science and Information Technology (Peshawar)
  2. 2.  It always seems impossible until its done.  We have two ears and one mouth so that we can listen twice as much as we speak. Nelson Mandela Epictetus
  3. 3. Introduction  Connections are structural elements used for joining different members in steel framed structures.  Steel structure is assemblage of different members such as “beams, columns” which are connected to each other usually at member ends that shows one composite unit.
  4. 4. Components of connections  Bolt  Weld
  5. 5.  Connecting plates  Connecting angles
  6. 6. Classifications of connections  Riveted connections  Bolted connections
  7. 7.  Welded connections
  8. 8. Riveted connections  Used for very long time.  Made up of: Round ductile steel bar called shank having head at one end.  The length of the rivet should be sufficient to form the second head.
  9. 9. Installation  Heating of the rivet.  Insert the rivet from one end.  Squeezing the plain end by pneumatic driver round head.
  10. 10. Bolted connection  Fastened together primarily by bolts.  Bolts may be loaded in: Tension Shear Both Tension and Shear
  11. 11.  The bolting operation is very silent.  Bolting is cold process hence there is no risk of fire.  Bolting operation is more quicker than riveting.  Less man power is required in making the connections.  If subjected to vibratory loads, results in reduction in strength get loosened.  Unfinished bolts have lesser strength because of non uniform diameter. Advantages Disadvantages
  12. 12. Welded connection  Whose composite are primarily joined by weld.  Welding Notations were developed by American Welding Society AWS.
  13. 13. Types of weld  Groove weld(more reliable than others).  Fillet weld(mostly use weaker than groove and others).  Plug(expensive-poor transmission of tensile forces).  Slot (expensive-poor transmission of tensile forces).
  14. 14.  It’s economical.  Provide rigid joints.  Efficiency is 100 % as compared to rivets.  No provision for expansion and contraction therefore greater chances of cracking.  Uneven heating and cooling- member may distort –may result in additional stresses. Advantages Disadvantages
  15. 15. Henry petroski • Science is about knowing; engineering is about doing.
  16. 16. THANK YOU

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