PUNCHING CAPACITY OF DECK SLABS IN GIRDER-SLAB BRIDGES

Static tests were conducted on a series of simulated deck panels of gi rder-slab bridges to determine the punching resistance of the reinforc ed slabs, with the aim to generate reliable test data from representat ive large-size models. Variables included in this rest were the differ ent load areas and the amount of the reinforcement in the slab. A comp arative study of the relative accuracy of three analytical methods for computation of punching resistance of slabs under a patch load has be en presented by comparing results with tile experimental values. Based on the observed failure modes, a modification to the of ten-used ACl formula for two-way shear resistance has been proposed.