Simplified computational strategies for dynamic shear

Non-linear dynamic analysis of complex civil engineering structures based on a detailed finite element model requires large-scale computations and involves delicate solution techniques. In earthquake engineering, the necessity to perform parametric studies due to the stochastic characteristic of the input accelerations imposes simplified numerical modeling in order to reduce the computational cost. The purpose of this work is to propose two simplified numerical strategies to simulate dynamic shear. The first one is an enhanced multifiber Tim-oshenko beam element with higher order interpolation functions in order to avoid any shear locking phenomena. The second one is the Equivalent Reinforced Concrete model (ERC) using lattice meshes for concrete and reinforcement bars. For both strategies, advanced constitutive laws are used based on continuum damage mechanics and plasticity. Verification is provided using experimental results on reinforced concrete walls subjected to severe dynamic loading. Both methods are computationally efficient and easy to use for engineering purposes