Examples of Non-Linear Analysis of Reinforced Concrete Structures with DIANA

摘要

The basic principle of the concrete mechanics project, is to analyze structural behavior of reinforced concrete members by adding up effects from cracking, bond-slip behavior and aggregate interlock into a numerical scheme which accounts for the geometry of the structure under consideration. Emphasis is placed on off-shore applications (cyclic and sustained loading). Three numerical models have been developed: DIANA, a general-purpose finite element code for the analysis of three-dimensional structures taking into account physical nonlinear material behavior, MICRO, a numerical model suitable for analyzing two-dimensional and axi-symmetrical structures, MACRO, a two-dimensional beam model. In the present report, eight examples of non-linear numerical analysis of reinforced concrete structures with DIANA are shown. The examples include the simulation of three construction details (tooth structure of the metro viaduct in Rotterdam, a corbel and a beam-column connection), three global structures (a reinforced concrete panel subdivided in two variants, a single-span deep beam and a panel on three supports), a numerical simulation of a tunnel section, and an analysis of an LNG tank subjected to a fire load, and two dynamic analyses (viz. a beam falling on a shock-absorbing element, and a numerical simulation of an explosion in a tunnel). All simulations are two-dimensional except for the simulation of the LNG tank, which is treated as an axisymmetric problem. Several types of loads are considered, i.e. static loading, fire loading, and dynamic loading. A general introduction on modeling with DIANA is given in the chapter. Typical problems encountered in the analysis for a certain problem are discussed separately for that particular example.