Abstract
The experimental investigations for the flexural strength and composite behavior of a bridge deck with precast concrete panel form work called LB-DECK based on the height change of lattice bar from 135 mm to 70 mm to increase ultimate strength and construction ability. Two types of beams with LB-DECK were tested. Tested beams with 70 mm lattice bar have 17.1% average ultimate strength than 135 mm lattice bar due to the increase of moment arm. And the cracks are propagated from the bottom of LB-DECK to the bottom of plate with continuous pattern, and the upper part of LB-DECK is in tension. From the monitoring of crack patterns and neutral axis changes, a composite behavior is observed between LB-DECK and slab concrete.