||Failure simulation using LS-DYNA of precast reinforced concrete beam-to-column connection under monotonic and cyclic shear loading is proposed. The experiment data to be simulated was taken from Psycaris and Mouzakis (2012). Two dowel bar as a device to resist shear loading is placed across joint. A rubber is also placed between the column and beam concrete. Influence of pull out resistance in shear resistance is explained by theory. The validation of material properties and contact parameter had been conducted by simulation compression test of concrete, a tensile test of steel, pull out test between steel and concrete, and validation of contact surface which the result is acceptable to be used in the simulation. Nonlinear material models of the concrete and steel such as MAT_CONCRETE_DEMAGE_REL3 and MAT_PLASTIC_KINEMATIC are considered. The rubber is considered using the elastic material. Solids element with eight-node element is used to build the beam, column, and rubber. Frame element is to simulate nonlinear responses of the dowel, reinforced steel, and stirrup. The contact surface between rubber and concrete is simulated by CONTACT_AUTOMATIC_SURFACE_TO_SURFACE. Contact element between concrete and dowel is constructed by CONTACT_1D as bond slip model of solid and frame element at LS-DYNA. Two specimens simulation with different coefficient of pull out resistance is simulated under monotonic loading which one of both specimens that have the closest shear-displacement relationship with experiment result is chosen to conduct under cyclic loading. Force control is used in monotonic loading and displacement control is used in cyclic loading. The behavior of connection under monotonic and cyclic loading is investigated by shear-displacement result, dowel action, stress at concrete and dowel and crack propagation which match with theory and experiment result. Based on analysis and discussion, the behavior of connection under shear loading can be investigated by the numerical method using LS-DYNA finite element program.|
Keyword: Shear- loading. LS-DYNA. Connection
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