Experimental study on mechanical behavior of new shear connectors for fabricated composite beams
To address the issues with the shear keys of prefabricated composite beams,a new design of shear key was proposed by embedding anchor bolts and steel plates in prefabricated concrete bridge decks and weld-ing them to the steel beam flanges.Push-out tests were conducted on the new anchor bolt shear key specimens to study their failure modes,load-slip curves,shear resistance,and stiffness.The results showed that the anchor bolts were sheared off during specimen failure,exhibiting a ductile failure mode.The load-slip curve of the specimens could be divided into three stages:elastic stage,elastic-plastic stage,and failure stage.The ultimate bearing capacity of the specimens reached a relative slip of around 2 mm,and the bearing capacity and shear stiffness of the anchor bolts decreased with an increase in the number of anchor bolts.Calculations showed that the bearing capacity of this new anchor bolt shear key design meets the requirements of engineering design.
万方数据
维普
