TY - JOUR
T1 - Flexural behavior of fire-damaged concrete beams repaired with strain-hardening cementitious composite
AU - Li, Xiuling
AU - Lu, Xi
AU - Qi, Jianan
AU - Bao, Yi
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/6/15
Y1 - 2022/6/15
N2 - This study proposes a method to repair fire-damaged concrete beams using strain-hardening cementitious composite (SHCC) and investigates their flexural behavior through full-scale tests. Eleven beams with different reinforcement ratios were fabricated. Eight beams were damaged in fire, and six of them were repaired using SHCC or basalt-fiber-reinforced polymer fabric. Three beams were used as control and not exposed to fire. All the beams were tested under four-point bending until failure. The results indicated that the proposed repairing method was capable of increasing the load-carrying capacity, stiffness, and crack resistance of fire-damaged beams. Repairing the side and bottom faces of the fire-damaged beams using SHCC increased the load-carrying capacity by 32%. To promote evaluation and repair of fire-damaged beams in engineering practices, a mechanical analysis was performed to derive engineer-friendly formulae for predicting the load-carrying capacity of repaired beams and validated against test data. This study will promote repair and evaluation of fire-damaged structures using SHCC.
AB - This study proposes a method to repair fire-damaged concrete beams using strain-hardening cementitious composite (SHCC) and investigates their flexural behavior through full-scale tests. Eleven beams with different reinforcement ratios were fabricated. Eight beams were damaged in fire, and six of them were repaired using SHCC or basalt-fiber-reinforced polymer fabric. Three beams were used as control and not exposed to fire. All the beams were tested under four-point bending until failure. The results indicated that the proposed repairing method was capable of increasing the load-carrying capacity, stiffness, and crack resistance of fire-damaged beams. Repairing the side and bottom faces of the fire-damaged beams using SHCC increased the load-carrying capacity by 32%. To promote evaluation and repair of fire-damaged beams in engineering practices, a mechanical analysis was performed to derive engineer-friendly formulae for predicting the load-carrying capacity of repaired beams and validated against test data. This study will promote repair and evaluation of fire-damaged structures using SHCC.
KW - Fire-damaged beam
KW - Flexural behavior
KW - Mechanical analysis
KW - Repairing
KW - Spalling resistance
KW - strain-hardening cementitious composite (SHCC)
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U2 - 10.1016/j.engstruct.2022.114305
DO - 10.1016/j.engstruct.2022.114305
M3 - Article
AN - SCOPUS:85129291505
SN - 0141-0296
VL - 261
JO - Engineering Structures
JF - Engineering Structures
M1 - 114305
ER -