Temperature-Based Design Method for Concrete Cone Failure Under Fire Conditions

Area of Science:

• Structural Engineering
• Fire Safety Engineering
• Materials Science

Background:

• Current Eurocode 2 methods for anchor tensile capacity under fire rely on embedment depth and fire duration.
• Existing methods lack precision for diverse fire scenarios and structural configurations.

Purpose of the Study:

• To develop and validate a temperature-based design method for anchor tensile concrete cone capacity under fire exposure.
• To provide a more accurate and flexible alternative to prescriptive design approaches.

Main Methods:

• Experimental investigation of anchor behavior under fire conditions.
• Parametric analysis considering concrete strength, edge effects, cracking, anchor type, and heating orientation.
• Correlation of anchor capacity with measured temperature profiles at effective embedment depth.

Main Results:

• Anchor capacity under fire exposure is conservatively described by the temperature at the effective embedment depth.
• The proposed temperature-based method shows strong correlation with experimental data across various conditions.
• The method offers optimized design possibilities compared to existing prescriptive approaches.

Conclusions:

• A temperature-based design method provides a more precise and flexible approach for determining anchor tensile capacity in fire conditions.
• This method enhances structural safety and design efficiency for anchors exposed to fire.
• Further research can refine the scope and application of this temperature-dependent design approach.