The omnia reinforcement truss concrete plank is a special concrete composite slab which has been used for the construction of bridges and buildings. Because of its complicated reinforcement layout, it is commonly analysed and designed by simplified methods which neglect the contributions of the reinforcement truss actions and the design is usually over-conservative. In this paper, a non-linear optimum design model considering the reinforcement truss action is proposed. Significant saving in reinforcement is achieved through such an optimum analysis.
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