Nonlinear analysis of moderately thick reinforced concrete slabs at elevated temperatures using a rectangular layered plate element with Timoshenko beam functions

摘要: Abstract A simple displacement-based 4-node, 24-DOF rectangular layered plate element for nonlinear finite analysis of thin-to-moderately-thick reinforced concrete slabs subjected to combined external and thermal loading is developed in this paper. Timoshenko’s composite beam functions are extended form the basis bending strain herein, so that proposed model approach not only provide a unified formulation thin moderately thick plates, but also avoid shear locking naturally. In addition temperature-dependent material nonlinearity, geometric nonlinearity accounted include tension membrane effect, which has been identified as major contributor load carrying capacity RC at elevated temperatures. Based on model, updated Lagrangian employed formulate solution procedures under constant Comparison results from previous literatures numerical ambient temperatures have demonstrated effectiveness procedures.