Two-Way Slab Deflection Fundamentals
A two-way slab is a structural element that bends significantly in two directions when subjected to loads. Its deflection pattern is complex, influenced by both its spans.
Primary Factor in Slab Deflection
The deflection of a two-way slab is primarily governed by its short span. Here's why:
- Slabs bend more easily along shorter distances.
- The shorter span dictates the primary bending direction and magnitude.
- While the long span influences the overall behavior, the maximum deflection is more sensitive to the shorter dimension.
Therefore, calculations and design considerations for two-way slab deflection predominantly focus on the properties and dimensions related to the short span.
Important Questions from Design of Structural Elements
- The slenderness ratio of a circular column of diameter $300 \text{ mm}$ and effective height $3 \text{ m}$ is _________ [in integer]
- Match the structural system in Group I with their potential causes of failure in Group II
Group I Group II (P) Flat Slab (1) Thrust (Q) Long Column (2) Flutter (R) Arch (3) Punching Shear (S) Tensile Fabric (4) Buckling (5) Moment A basement wall resists lateral pressure exerted by soil and water. The soil pressure amounts to $4.5 \text{ kN/m}^2$ for every metre of depth below Ground Level (GL). The sub-soil water level is $1.0 \text{ m}$ below GL and hydrostatic pressure of water is $9.8 \text{ kN/m}^2$ for every metre of depth below GL. The total lateral pressure (in $kN/m^2$, rounded off to one decimal place) exerted on the wall $2 \text{ m}$ below GL is______
- Slenderness ratio of a column is represented as:
For a symmetrical two dimensional truss as shown in the above figure, vertical force in kN acting on the member PQ is ________
