| Title |
Load Distribution of Sub-beam considering Slab Stiffness and Boundary Conditions |
| DOI |
https://doi.org/10.5659/JAIK.2021.37.2.173 |
| Keywords |
sub-beam; load distribution; one-way slab; slab stiffness; boundary condition |
| Abstract |
A new floor load distribution method for slabs with sub-beam was proposed, taking into account slab stiffness. In the current 45
degree-based load distribution method, the load distribution ratio of sub-beam and girder (RB:RG) is the same (50:50). However, when
considering the composite action with slab and boundary conditions, the ratio of sub-beam would be smaller than that of girder. In this
study, floor load distribution ratio according to the relative stiffness of slab and sub-beam and boundary conditions was evaluated by finite
element analysis including slabs. The load distribution of the slab was greater when increasing the relative stiffness of slab and sub-beam,
and that of sub-beam decreased as greater as that of the slab. For conservative design approach, the reduced portion from the sub-beam due
to would add the load distribution of girder rather than subtraction from total floor load. In practical modules- span length, beam geometry,
etc., the ratio (RB:RG) can be adjusted up to 40:60 by reducing the stiffness of sub-beam obtained by performance based design. |