Improvement of Concrete Compressive Strength Evaluation Method for Safety Assessment of Existing Structures

Key Points

• This research aims to analyze the limitations of existing concrete compressive strength evaluation criteria and propose improvements for precise safety assessments of structures.
• Proposed three evaluation methods based on field conditions: regression model with core and non-destructive tests, minimum value statistical correction for limited core samples, and applying conservative multipliers in non-core situations.
• Developed guidelines aligning with international standards like EN and JCI regarding the acceptance of small core specimens and test location selection.
• Utilized case studies with actual structural data to validate the proposed evaluation methods.
• The proposed methods addressed the underestimation issues in existing KDS standards, achieving more reliable evaluation inputs.
• Demonstrated better handling of data uncertainty in concrete strength assessments.
• Confirmed the applicability and effectiveness of the improved evaluation criteria in real-world scenarios.

Abstract