Box section is very efficient in the resistance against torsion. Therefore, it is mainly used for the beams under eccentric load, but the analysis of Box section have many difficults in the process of the calculation
In order to simplify this calcul...
Box section is very efficient in the resistance against torsion. Therefore, it is mainly used for the beams under eccentric load, but the analysis of Box section have many difficults in the process of the calculation
In order to simplify this calculation, analysis of Box Girder section can be solved by analogy of Beam on Elastic Foundation. Deflection and bending moment in BEF correspond to distortion stress and warping stress in Box Girder section.
Beam on Elastic Foundation consistes of a beam of moment of inertia I supported by an Elastic Foundation of modulus k, as well as by regularly or irregularly spaced elastic spring supports of stiffness Q_1, Q… Q_m.
Spring support stiffness Q and elastic foundation modulus k have influence with deflection and bending moment in BEF. especially deflection is greatly influenced with spring support stiffness Q.
Influence line analysis for distortion and warping stress in Box Girder was possible with this analysis of BEf with spring supports.