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Design of Steel Structures- 1

ASSIGNMENT NO : 1
1. a) Explain in briefly the different types of failures of riveted joints with suitable
         sketches.
    b) A double riveted double cover butt joint is used to connect plates 12mm thick.
          Determine the diameters of the rivet, rivet value,pitch and efficiency of the joint.
         Adopt the permissible stress in plate for axial tension  may be taken as 0.6 fy,
          fy =250N/mm2and power driven shop rivets.
2. a) State the assumptions in the theory of riveted joints.
    b) The truss members meeting at  a bottom joint as shown
          in figure. Design the riveted Joint connection by 10mm
          thick gusset plate. Sketch also the joint details.Using the
          Power driven field rivets.
3. a) What are the advantages of welded joints over riveted joints?
    b) Design a suitable longitudinal fillet weld to connect 150x8mm plate to150x10mm
         Plate to transmit a pull, equal strength of small plate. Assume welding is to be made
         in the field.
4. a)  What is a plug and slot welds? 
    b) a tie in a truss consists of a pair of angles ISA 90x60x10mm welded on either side of
         a  gusset plate of 12mm  thick  through the longer legs. Design the welded joint if the
         Permissible stresses in angles and fillet welds are 150 MPa and 108 MPa respectively.
5. a) Why the fillet weld is preferred over a butt welds?
    b) An ISLC 350 @ 380.6 N/m is connected to a gusset plate 10mm thick. Desig a fillet
          weld if the over lap is limited to 350mm. Use slot welds if required.
6. a) Explain briefly the different types of bolts.
    b) Design a lap joint to connect to plates of 16mm thickness by using high strength                         
         friction Grip bolts. The joint shall be transmit a pull equal to full strength of the plat       
         (fy=   260MPa)
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Comments

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