Flexure design procedures

Structural element strength Structural section flexural and shear capacities should be designed in accordance with common strength factors of safety and design procedures. 

The reliability of this real life experience is corroborated by the results of laboratory research. American Society for Testing and Materials (ASTM) C581 [6] is designed to reflect the resin deterioration when a laminate is totally immersed in a corrosive medium. Central to the procedure is the strict specification of a standard laminate and of standard conditions for exposing samples to corrosive liquids. The method specifies determining the hardness and flexural properties of the laminates at 1, 3, 6 and 12 months. 

The most popular simplified analysis procedure shall assume the face slab as independent one-way slab system in each direction. Considering the un-uniform soil pressure distribution behind face slab, the adjustment factors Cj and Cj shall be used for the flexure and shear cases, respectively. Most design... 

Designing for plastic products usually starts with the classic approach of using the tensile, compressive, or flexural strength characteristics of the plastics. Quickly, however, the designer must depart from conventional engineering procedures, as the viscoelastic and heat-resistance properties of the material begin to take precedence in evaluating load performance. 

In designing an FRC slab, the appropriate equations mentioned in [1] above are used, but modified for the toughness, or the residual (post-cracking) tensile or flexural strength of the FRC. It should be noted that this modification depends on the specific test procedure used to characterize the FRC (see Chapter 6), and again may not be easy to generalize. 

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