Design and Experimental Performance Evaluation of Lens-type Shear Panel Dampers for Highway Bridge Bearings

摘要

8 beam-flange reinforced connections are test at 1/2 scale to study hysteretic behavior of specimens. 8 specimens in clude 4 connections; 2 flange-plate reinforced connection,2 cover-plate reinforced connection,2 widen-flange connec tion and 2 side-plate reinforced connection. Failure patterns,capacity of energy dissipation,hysteretic behavior, skel eton curves and stiffness degradation are comparative studied. Results show: Connection type has a great effect on ductility and hysteretic behavior; compared with side-plate connection, hysteretic curves of other three connections were more full and energy dissipation of side-plate connection was inferior to the other three. Hysteretic behavior and energy dissipation capacity for rectangular plate-reinforced connection was superior to the trapezoidal plate rein forced connection; the smaller size of enlarged flange, the better of hysteretic performance and energy dissipation ca pacity with the relocation of plastic hinge. Flange-plate reinforced connection was the better one connection of above and was recommended to use in meizoseismal area because of easy making, low cost and good energy dissipation ca pacity. (1 empty line)