Bolted connections Connections in steel structures
Course overview 1. Introduction to bolts 2. Advantages and disadvantages 3. Types of bolts 4. Terms involved 5. Types of connections 6. Modes of failure 7. Solve problems (for GATE and other competitive exams)
What is a bolf? . A metal pin with a head formed at one side & shank threaded at the other in order to receive a nut > Join metal pieces together by inserting them through holes and tightening the nut.
BOLT WITH NORD-LOCK WASHER RIVETS
Advantages Making joints- noiseless No need of skilled labour Quicker process Structure put to use immediately Alterations Very less working area
Disadvantages . Area of member reduced- for bolt holes Vibrations- loosen the bolts
Types of bolts
Grip length Assembly package thickness Bolt length
Black bolts Unfinished/ ordinary/rough Mild steel . When structure not subjected to reversal of stresses Preferred for static loads, not dynamic Bearing type of failure Grip length (a) not more than 80; if else, bending due to eccentricity bolts fail in tension
High strength friction grip (HSFG)bolts High strength steel (like HYSD) Development of clamping and frictional forces When structure subjected to reversal of stresses Clamsing foce dsvelaped Bolt pre-load producas by gmenng of hut Cisaranco holes in plates Fricsional ferces at mateg sutaces resst ertonel load Hsrdened washer Heary nut
Lives by the saying "Learning never stops". A student pursuing her bachelor's in civil engineering.