Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment
Zhao-Jun Zhang1, Wen-Wei Wang1,2,*, Jing-Shui Zhen1, Bo-Cheng Li1, De-Cheng Cai1, Yang-Yang Du1, Hui Huang2
1 Offshore Oil Engineering Co. Ltd., Tianjin, 300461, China
2 Department of Bridge Engineering, School of Transportation, Southeast University, Nanjing, 211189, China
* Corresponding Author: Wen-Wei Wang. Email: 
(This article belongs to the Special Issue: Advanced Data Mining in Bridge Structural Health Monitoring)
Structural Durability & Health Monitoring https://doi.org/10.32604/sdhm.2024.052506
Received 03 April 2024; Accepted 14 June 2024; Published online 19 September 2024
Abstract
This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer (GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment zone. An experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs, and a calculation method based on the conjugate beam method was proposed. The composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab specimens. Two methods, epoxy resin bonding, and stud connection, were used to connect the composite slabs with the steel beams. The experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process: concrete cracking and steel bar yielding at the internal support. In contrast, the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading process. As the concrete at the internal support cracked, the bending moment decreased in the internal support section and increased in the mid-span section. When the steel bars yielded, the bending moment further decreased in the internal support section and increased in the mid-span section. Since GFRP profiles do not experience cracking, there was no significant decrease in the bending moment of the mid-span section. All test specimens experienced compressive failure of concrete at the mid-span section. Calculation results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support section. The proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.
Keywords
Moment redistribution; GFRP-concrete composite slabs; bending moment; experimental study; analysis model
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