This paper presents a systematic approach for estimating material performance and designing the mix proportion of concrete based on an application of a Bayesian method in the form of satisfaction curves. The one-parameter satisfaction curve represents a satisfaction probability for a concrete performance criterion as a function of the concrete material parameters. An analysis method for combining multiple satisfaction curves to form one unique satisfaction curve that can reduce the performance of concrete to a single evaluating value, the goodness value, is proposed as an evaluation tool for the performance-based mixture design procedure. The proposed performancebased mixture design procedure is applied to test cases to obtain a target-oriented concrete mix proportion design and to verify the validity of the proposed method. Finally, the expected performance results of a concrete mix proportion designed using performance-based mixture design are compared with results calculated using the American Concrete Institute estimation equation to check whether the method is applicable to actual construction.
Accurate computational blast analysis can be an effective replacement for costly blast field test. HFPB (high fidelity physics based) blast analysis method including high strain rate dependent material models and appropriate blast wave models is a representative precise blast analysis method. HFPB blast analysis method can be used for various analyses such as structural analysis, retrofitting design analysis, fragmentation analysis, and energy absorbing analysis. When analyzing the behaviour of structure under blast loading by HFPB finite element methods, load gradient differences occurs dependent on the mesh size. This causes gaps between the explosive energy and internal energy of structures and the results of analysis become mesh-size-dependent. In this study, the analytical considerations were presented for mesh sensitivity due to non-uniform pressure load distribution on the structure subjected to blast wave of high explosive with relatively close stand-off. Through the analysis results, the maximum element size which ensures the mesh-size independent analysis results is suggested. Keywords: HFPB (high fidelity physics based) blast analysis method, load gradient, mesh-size-dependent, mesh sensitivity, nonuniform pressure, the maximum element size ···································································································································································································································
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