Admissible Sectional Dimensions of R/C Floor Elements to be Designed without Deflection Check Part 1: Transverse Beams

By use of our proposed modified method, a parametric deflection analysis is attempted for transverse beam models with their dimensions varied within a major practical range in typical cases of their end condition depending on whether or not they have, at one end and/or both, adjoining beams in a slab-beam-girder floor system; the analysis being interested to result in necessary criteria for beam section sizes admissible in floor design without intricacy of deflection check. Some other design criteria needed for maintained serviceability are derived at the same time

A Procedure for the Analysis of Long-Team Deflection of Reinforced Concrete Members and Its Adaptability

For deformation analysis of partially cracked floor members of reinforced concrete, a procedure with some modifications to our earlier system is proposed. Instead of its having relied on that concept of average for the oft-cited effective member stiffness long used thus far at least in ancillary form by the ACI Code, the present system can afford to account for the detail of steel arrangement along a member by treating all its sections assumed attendant on finite difference subdivision for beam analysis. In a consistent attempt, the whole lengthwise sectional variation is considered as well in the long-time case of analysis. Then, a long standing notion of increased modular ratio is adopted, alternatively to the ACI\u27s time-dependent multiplier which is given also in average form by way of direct inclusion of the effect of the creep resistant compression steel. Relative adequacy of the proposed procedure is discussed in comparison of many cases of earlier test results in the literature with deflection estimates by our method and commonly available code methods