Residual Strength of Heated Reinforced Cement Concrete Columns

Journal of Structural Engineering, Vol. 3, No. 1, pp. 54-69, January 2010

Posted: 1 Feb 2010

See all articles by T. Srinivas

T. Srinivas

GITAM, Visakhapatnam

K. Srinivasa Rao

Andhra University

M. Potha Raju

Professor, Department of Civil Engineering

Date Written: January 31, 2010

Abstract

Concrete elements exposed to fire undergo temperature gradients and, as a result, undergo physical changes or spalling, thereby exposing the steel reinforcement. The structural property of concrete that has been most widely studied as a function of temperature exposure is compressive strength. This study was carried out to generate experimental data on residual strength of heated Reinforced Cement Concrete (RCC) columns. A total of 24 RCC columns were cast with similar cross-sectional details, length, grade of concrete, reinforcement and clear cover provided to reinforcement. Two columns were kept at each temperature for 3 h, starting from a lower temperature of 100 °C and ending at a high temperature of 1,000 °C with increments of 100 °C. Thereafter, these test specimens were tested for ultimate failure loads, thermal crack widths, Ultrasonic Pulse Velocity (UPV) and rebound hammer values after cooling them to room temperature.

Keywords: Residual Strength, Temperature Exposure, Thermal Crack Width, Ultrasonic Pulse Velocity

Suggested Citation

Srinivas, T. and Srinivasa Rao, K. and Potha Raju, M., Residual Strength of Heated Reinforced Cement Concrete Columns (January 31, 2010). Journal of Structural Engineering, Vol. 3, No. 1, pp. 54-69, January 2010, Available at SSRN: https://ssrn.com/abstract=1545586

T. Srinivas

GITAM, Visakhapatnam ( email )

Rushikonda
Gandhi Nagar
Visakhapatnam, Andhra Pradesh 530045
India

K. Srinivasa Rao (Contact Author)

Andhra University ( email )

Visakhapatnam
India

M. Potha Raju

Professor, Department of Civil Engineering ( email )

Rushikonda
Gandhi Nagar
Visakhapatnam, Andhra Pradesh 530045
India

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