Orthogonal experimental study on mechanical properties of CFRP-bolted timber joints with slotted-in corrugated steel plates
In order to visualize the effect of shaped sections on the joints,and to provide some experience for the safety design of bolted timber joints with slotted-in shaped steel plates,a CFRP-bolted timber joints with slotted-in corrugated steel plates was proposed,and uniaxial paralleling tensile tests were carried out under orthogonal parametric design conditions.The tests reveal that the joints have multiple force characteristics,which mainly include the forms of timber shear damage,transverse to tension-type fracture(TL fracture),end compression crush,CFRP fracture and bolt bending.The joints have no obvious yielding stage,and mainly undergo the elastic stage,the fracture failure transition stage and the fracture failure stage.Based on the orthogonal parametric analysis,the degree and the pattern of different factors on the proposed joint were obtained.Results show that the ultimate strength and ductility are more significantly influenced by each factor than the elastic stiffness,and the wave angle and the wave height are the main factors.The ultimate strength fluctuates with the increase of the wave height and is negatively correlated with the wave angle,while the ductility is negatively correlated with the wave angle and the wave height.
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