Nonlinear Dynamic Analysis of the Progressive Collapse on Multi-core Computers

The method of analysis of structures for progressive collapse, based on the integration of nonlinear equations of motion, is considered. A finite element library has been developed that includes both bar and flat shell finite elements that take into account transverse shear deformations. For reinforced concrete structural elements, discrete placement of reinforcement is taken into account. The behavior of concrete is described by the plastic flow theory when using the yield surface in the form of a non-circular paraboloid, and the behavior of reinforcement is described by von Mises’s plastic flow theory with the use of kinematic hardening. The destruction of concrete and the rupture of reinforcement are simulated using the damage parameter. Geometric nonlinearity is taken into account. The method is focused on shared memory multi-core computers.