Structures - JSS1 Basic technology Past Questions and Answers - page 2

The three main types of structures introduced are frame, shell, and composite. Frames consist of interconnected beams and columns, providing support and stability. Shells rely on their shape to distribute loads efficiently, while composites combine multiple materials to create structures with enhanced properties.

Shells rely on their shape to distribute loads efficiently. Their curved or flat surfaces are designed to withstand external forces by distributing them evenly across their surface area. This allows shells to support heavy loads without the need for additional internal support structures.

The primary forces acting on structures are compression and shear. Compression forces push or squeeze materials together, while shear forces cause materials to slide past each other horizontally. These forces are essential considerations in structural design and play a crucial role in determining the stability and integrity of a structure.

Compression forces push or squeeze materials together. This force is exerted uniformly across the surface of an object, causing it to compress or deform. Compression is a common phenomenon in structural engineering, where materials must withstand the weight and pressure exerted upon them.

Concrete is valued for its compressive strength and versatility in construction. It is capable of withstanding significant compression forces, making it ideal for supporting heavy loads in structures such as buildings, bridges, and dams. Additionally, concrete can be moulded into various shapes and sizes, offering flexibility in design and construction.