Match list 1 (column base) with list 2 (its application) and select correct answers using the code given below List 1 List 2 A) Grillage foundation 1) Lightly axial loaded steel column B) Gusseted base 2) Heavy loaded steel column to be rested on weak soils C) Slab base 3) Eccentric loaded steel column
Understanding Steel Column Base Foundations
Selecting the appropriate base foundation for a steel column is crucial in structural engineering. It ensures the stable transfer of loads from the column to the underlying soil. Different base types are designed for specific loading conditions and soil characteristics. This section explains the matching between common base types (List 1) and their applications (List 2).
Grillage Foundation Application
A Grillage foundation typically consists of steel beams arranged in layers and embedded in concrete. This type of foundation is specifically designed to handle heavy axial loads. It's particularly effective when the column needs to be supported on weak soils, as the grillage beams distribute the load over a larger area, reducing the pressure on the soil. Therefore, the grillage foundation is correctly matched with the application of supporting a heavy loaded steel column on weak soils.
Match: A - 2 (Grillage foundation matches Heavy loaded steel column to be rested on weak soils)
Gusseted Base Application
A Gusseted base is used for steel columns that experience not only axial loads but also significant bending moments due to eccentric loading conditions. The base includes gusset plates that connect the column flanges and web to the base plate, providing rigidity and the capacity to resist these moments. This makes it suitable for columns under eccentric loads.
Match: B - 3 (Gusseted base matches Eccentric loaded steel column)
Slab Base Application
A Slab base (also known as a rectangular base plate) is a common type of foundation used for steel columns. It consists of a flat steel plate placed under the column. This type is generally employed when the column carries axial loads that are not excessively heavy and when the bending moments are minimal. The slab base effectively distributes the load to the concrete foundation.
Match: C - 1 (Slab base matches Lightly axial loaded steel column)
Summary of Matches
Based on the explanations above, the correct pairings are:
- Grillage foundation (A) is used for heavy loaded columns on weak soils (2).
- Gusseted base (B) is used for eccentric loaded columns (3).
- Slab base (C) is used for lightly axially loaded columns (1).
The correct option combining these matches is A - 2, B - 3, C - 1.
Important Questions from Column Base
Under what situation will a gusseted base be provided in a column?
A column splice is used to increase
In a structure, why are the cables and wires are generally used?
Which of the following is a type of base of steel structure?
The slenderness of bracing members shall not exceed:
