This question was previously asked in

BPSC AE: Paper 5 (Civil Engineering) 2018 Official Paper

Option 3 : compressive

ST 1: Structural Analysis

1581

20 Questions
60 Marks
25 Mins

__Concept:__

Domes are self-supporting structures they take the form of an arch distributing external loads around the sides and down to the foundations. They are tightly compacted by gravity and any external loads are carried by the compressive forces that develop internally.

Meridional forces act in a longitudinal direction of a dome and increase from crown to base in magnitude. Meridional forces are due to the weight of the masonry and applied loads.

Hoop forces act in a latitudinal direction of a dome on the lateral faces of the voussoirs, and contribute significantly to the stability of domes and their construction. For a dome with uniform axisymmetric loading, hoop forces from adjacent slices are equal in magnitude and act on the same plane.

In a spherical dome subjected to concentrated lead at crown or uniformly distributed load, the **meridional force is always compressive**.