Effect of Transient Creep on the Structural Performance of Reinforced Concrete Walls under Fire
Abstract
:1. Introduction
2. Modeling
3. Numerical Example
3.1. Effect on a RC Wall with Little Spalling
3.2. Effect on a RC Wall with Explosive Spalling
4. Model Validation
5. Parametric Studies
5.1. RC Walls with Little Spalling
5.1.1. Effect of Wall Thickness
5.1.2. Effect of Wall Height
5.1.3. Effect of Concrete Strength
5.1.4. Effect of Eccentricity of Load
5.2. RC Walls with Explosive Spalling
5.2.1. Effect of Wall Thickness
5.2.2. Effect of Wall Height
5.2.3. Effect of Intrinsic Permeability of Concrete
5.2.4. Effect of Eccentricity of Load
6. Conclusions
- The transient creep has a notable effect on the structural deformations of RC walls under fire even without load. The transient creep significantly reduces the fire resistance of RC walls with little spalling, and the effect increases with the increasing load level and/or the increasing eccentricity of load.
- The transient creep delays the occurrence, reduces the rate of explosive spalling, and increases the fire resistance of RC walls with explosive spalling. The stress relaxation effect of transient creep has a crucial role in determining the spalling manner, and it mitigates the variation in spalling along the wall height.
- The influence of the transient creep on the fire resistance of RC walls with little spalling increases with the decreasing wall thickness and/or the increasing wall height, while the effect decreases with the similar changes for RC walls with explosive spalling. The variation in the intrinsic permeability of concrete can have an effect on the influence of transient creep on the fire resistance of RC walls.
- The high thermal mass of concrete and the low permeability of high-strength concrete are the key factors leading to the transient creep’s significant influence on the fire resistance of RC walls.
Funding
Data Availability Statement
Conflicts of Interest
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Chen, J. Effect of Transient Creep on the Structural Performance of Reinforced Concrete Walls under Fire. Buildings 2024, 14, 406. https://doi.org/10.3390/buildings14020406
Chen J. Effect of Transient Creep on the Structural Performance of Reinforced Concrete Walls under Fire. Buildings. 2024; 14(2):406. https://doi.org/10.3390/buildings14020406
Chicago/Turabian StyleChen, Jun. 2024. "Effect of Transient Creep on the Structural Performance of Reinforced Concrete Walls under Fire" Buildings 14, no. 2: 406. https://doi.org/10.3390/buildings14020406