.png){kind=icon}
.png){kind=icon}
Return
Experimental investigation of the static behavior of continuous concrete beams strengthened with externally prestressed CFRP tendons
.png){kind=icon}
PRE
AI
J
J
X
X
DOI：10.1016/j.istruc.2026.112308.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Externally prestressed CFRP tendons provide an effective strengthening technique for continuous concrete beams; however, the influence of loading pattern on their structural response and moment redistribution behavior remains insufficiently understood. This study experimentally investigates the static behavior of two-span continuous concrete beams strengthened with externally prestressed CFRP tendons under asymmetric loading and symmetric loading. The ultimate load capacity, load–deflection response, strain development of internal reinforcement and concrete, stress evolution of CFRP tendons, and moment redistribution behavior were systematically examined. The results show that the symmetric loading condition produced a higher ultimate load capacity than the asymmetric loading condition, increasing the ultimate load from 114 kN to 127 kN. Under symmetric loading, yielding first occurred at the middle support section and was followed by yielding at the in-span sections, resulting in a longer plastic development stage and a larger stress increment in the CFRP tendons. At the ultimate state, the CFRP tendon stress increment under symmetric loading was approximately 35% greater than that under asymmetric loading. Moreover, the moment redistribution coefficient at the middle support reached 39.9% under symmetric loading, compared with only 3.7% under asymmetric loading. A characteristic “plastic triangle” was identified from the load–strain response at the middle support section, providing a graphical indicator of plastic development and moment redistribution. These findings demonstrate that loading pattern significantly affects the static behavior and redistribution capacity of continuous concrete beams strengthened with externally prestressed CFRP tendons, and should therefore be carefully considered in design.
Journal
IF:
4.3
Papers:
1.2W
Citations:
2.7W
Organization
Cited Papers