Mechanical Analysis of Prefabricated Assembly Unbonded Prestressed Bolt-Connected Composite Beams
By refining the local coordinates to accurately simulate the relative slip between unbonded prestressed tendons and reinforced concrete beams using the Coupling method,and based on ABAQUS finite element software,the study investigates the mechanical performance of prefabricated assembly unbonded prestressed bolt-connected composite beams under bending loads.The results showed that the bolt connection has high strength,and under bending loads,only the concrete at the mid-span of the beam without bolt connections is crushed,while the interface between the beam and the slab undergoes damage.The ultimate load-bearing and deformation capacities of the beam are related to the shear connection strength of the bolts,but the ultimate load-bearing capacity and bolt connection strength are not simply linearly related.The most significant factor influencing the beam's ultimate load-bearing capacity is the strength of the concrete slab.The strength of the concrete beam does not have a significant impact on the ultimate load-bearing capacity,primarily because the failure mode of the beam occurs when the interface between the beam and the slab fails,with minimal damage to the beam itself.
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维普
