Fire Behavior and Modeling of Short RC Columns in Pure Axial Compression: Role of Volume, Configuration, and Spacing of Lateral Reinforcement

Chinthapalli, Hemanth Kumar and Sharma, Shivam and Agarwal, Anil (2022) Fire Behavior and Modeling of Short RC Columns in Pure Axial Compression: Role of Volume, Configuration, and Spacing of Lateral Reinforcement. Journal of Structural Engineering, 148 (1). pp. 1-17. ISSN 0733-9445

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Abstract

This paper studies the role of volume, spacing, and configuration of lateral reinforcement on the axial load resisting capacity of reinforced concrete (RC) columns at elevated temperatures. Short RC columns were tested under combined thermal and compressive loading conditions. Columns with different confinement reinforcement volumes, two different lateral reinforcement configurations, and three different lateral reinforcement spacing values were tested as a part of this study. The test results indicate that lateral reinforcement passing through the core of the column is more effective than rectangular lateral reinforcement placed at the perimeter in improving the fire performance of RC columns. Two different numerical approaches, namely, finite element-based approach in combination with a concrete plasticity model and fiber-based sectional analysis approach along with concrete confinement models available in the literature were used to simulate the axial compression behavior of RC columns at elevated temperatures. It was established that some of the popular confinement models developed for ambient temperature conditions could also be used to model the confinement effect at elevated temperatures. Further, a parametric study was conducted to study the role of lateral reinforcement on a broader set of column parameters. It was established that the confinement effect is generally more pronounced at elevated temperatures than at room temperature. © 2021 American Society of Civil Engineers.

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IITH Creators:

IITH Creators	ORCiD
Agarwal, Anil	https://orcid.org/0000-0002-3902-4304

Item Type:

Article

Additional Information:

Experimental tests were conducted at the Department of Civil Engineering Research Laboratories at the Indian Institute of Technology Hyderabad. The research presented in this paper was partially funded by the Ministry of Education, Government of India.

Uncontrolled Keywords:

Confinement reinforcement; Elevated temperatures; Fire; Spacing of lateral reinforcement; Thermal effects on RC columns

Subjects:

Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

29 Jul 2022 03:55

Last Modified:

29 Jul 2022 03:55