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Title |
Failure Strength Analysis of Simply Supported Sandwich Slab Bridges made by Composite Materials
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Keywords |
Sandwich slab bridges; Composite materials; Specially orthotropic theory; Finite difference method; Failure strength analysis; form-core; 샌드위치 슬래브 교량; 복합재료; 특별직교이방성이론; 유한차분법; 파괴강도해석; 폼코아 |
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Abstract |
In this paper presented, a design method of sandwich slab bridge of simple supported made by composite materials. Many of the bridge systems, including the girders and cross-beams, and concrete decks behave as the special orthotropic plates. Such systems with sections, boundary conditions other than Navier or Levy solution types, or with irregular cross sections. analytical solution is very difficult to obtain. Thus. Finite Difference Method is used for analysis of the pertinent problem. For the design of bridge made by the composite material, cross-section is used the form-core shape because of this shape is economical and profitable, and for output of the stress value used F.D.M. Based the experimental of a composite specialist, an equation expressing the rate of decrease of tensile strength of glass fibers based on increase of mass was obtained. From these equations, one can estimate the rate of tensile strength reduction due to increased size. Tasi-Wu failure criterion for stress space is used. Strength-failure analysis procedure, using these reduced tensile strength, is presented.
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