Experimental Study on Static Performance of Precast Bridge Crash Barrier Connected by Bolts
The full-size experimental study is carried out for the static performance of a 4 m long precast fabricated bridge barrier connected by the bolts to verify its construction feasibility.And the load-defor-mation curves and failure modes are obtained.Based on the experimental result,the bearing capacity of a single-section barrier cannot meet the requirement of horizontal crash load in the current specifications.Due to the barrier segment too short,the force on the deck cantilever plate connected with it is more concentrated,which will cause the yield and local torsion failure of deck slab.The barrier itself is still perfect.The failure mode is different from that of the specification.In addition,the finite element software is used to carry out the simulation and parameter analysis on the stress performance of the barrier.The result shows that the bearing capacity of the barrier increases with the increment of segment length.When the barrier length reaches more than 12 m,the barrier can be plastic damaged and the deck slab will not be damaged.
fabricated barrierstatic performancefield testfinite element modeling
NETL
NSTL
万方数据
