| Summary: | 碩士 === 淡江大學 === 土木工程學系 === 87 === The research is related to the protective design of aboveground reinforced structure constructed against the attack of traditional weapons, with planning, analysis and design conducted according to simulation references and codes, focussing on arch structure of the same depth to mesh two different concrete arch structures. Namely, Model A being a single-layer concrete structure, while Model B being a double-layer concrete structure having a sand layer wedged between, with analysis and comparison conducted based on the embodiments of four different impact or blasts loading.
The structure uses constitutive models in simulation in which concrete, steel, and sand necessary for shielding the structure against the external reaction of explosion or direct impact made by projected object are adopted to test the effects thus produced. The analysis of overall structure of dynamics response tested by loading- time function, and local effect by experience formula corresponding to the concrete structure are conducted respectively. Overall effects are first analyzed and designed by the theory of elastic-plastic in single degree dynamics systems, and ABAQUS of finite element program is subsequently used in simulation to find out the difference by comparison.
The result of analysis of embodiments indicated that besides segregation can be made to the destruction caused to the bottom layer of the structure by impact and explosion, the double-layer structure is also found featured for easy repair and maintenance because of the integral forming of its external structure.
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