科研之友
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摘要
A novel technique was developed for reinforcing H-shaped steel columns with bonded steel plates and bolts (BSPBs) without welding. Static tests were performed on seven full-scale reinforced columns and two full-scale unreinforced columns. The failure characteristics, strain, and displacement of the nine full-scale specimens were experimentally obtained under a static compressive load. The BSPB-reinforced H-shaped steel columns mainly failed because of local yielding and peeling of the steel plates. The reinforced specimens did not exhibit sub-stantial instability, and the column deformation was effectively controlled. The reinforcements clearly increased the bearing capacity and stiffness of the specimens, and the anchoring bolts for symmetrically bonding the steel plates to the flange of the H-shaped steel columns without welding increased the axial bearing capacity. The influences of the steel plate thickness, anchor bolt spacing, and eccentricity on the reinforcement performance were investigated. A cohesive zone model (CZM) was used to determine the interfacial stress distribution in the adhesive layer. The corresponding theoretical predictions of the compression bearing capacity agreed well with the experimental results.
