Ultimate-Strength Design

Definition

Ultimate-strength design is a method of structural analysis of continuous concrete structures based on calculating the loadings which will cause actual failure of sections, rather than the loadings which will cause stresses to reach allowable, safe values.

Purpose

The purpose of ultimate-strength design is to ensure that structures are designed to withstand the highest possible loads they may encounter, providing a higher level of safety by considering potential failure scenarios.

Examples of Use

1. Concrete Buildings: Using ultimate-strength design to ensure the safety and durability of high-rise concrete buildings.
2. Bridges: Designing bridges with ultimate-strength design to ensure they can handle maximum loads and prevent collapse.
3. Industrial Structures: Applying ultimate-strength design principles to ensure the safety of large industrial structures under extreme loads.

Related Terms

• Load and Resistance Factor Design (LRFD): A design methodology that incorporates factors for both loads and material resistances.
• Factor of Safety: A safety factor used in design to account for uncertainties in load assumptions and material properties.
• Structural Analysis: The process of determining the effects of loads on physical structures and their components.

Notes

• Methodology: Ultimate-strength design involves calculating the maximum loads and the corresponding failure points of structural elements.
• Safety: This design approach provides a more realistic assessment of a structure's capacity to withstand extreme loads.