For a symmetrical two hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust
- Ais increased
- Bis decreasedCorrect
- Cremains unchanged
- Dbecomes zero
Solution
Concept
Support movement in arches
Step-by-step solution
1. A horizontal spread of the support reduces the thrust.
Explanation
A horizontal spread of the support reduces the thrust.
Shortcut
Spread → H decreases.
Correct answer: B) is decreased