Steel part 3 slide 1-25 set 2

To reduce self-weight of plate girder, the web thickness should be

• Increased

• Made minimum

• Equal to flange thickness

• None of these

Web buckling

• Determines ultimate strength of girder

• Is the main failure mode

• Does not determine ultimate strength

• Is caused by flanges

When plate elements in girders buckle, they

• Immediately collapse

• Lose all capacity

• Possess post-buckling strength

• Are removed

Plate girders are used in

• Floor girders

• Bridge girders

• Crane girders

• All of these

Assertion (A): Web plate provides distance between the two flange plates. Reason (R): Web plate is the horizontal element in plate girders.

• Both A and R are true, and R is the correct explanation

• A is true, R is false

• Both A and R are false

• A is false, R is true

Assertion (A): Flange plates are provided at top and bottom of plate girders. Reason (R): They resist horizontal shear only.

• Both A and R are true, and R is the correct explanation

• A is true, R is false

• Both A and R are false

• A is false, R is true

Assertion (A): Stiffeners help prevent local buckling failures in plate girders. Reason (R): They distribute applied loads into the beam.

• Both A and R are true, and R is the correct explanation

• Both A and R are true, but R is not the correct explanation

• A is true, R is false

• Both A and R are false

Match the following

• Top and bottom

• Flanges

• Along web

• Web

• Center vertical

• Stiffeners