N tt P tt M .y x max M tt .x max (3.25) i max n y i n c n c min c y 2 i 1 x 2 i 1 In which: N tt ; M tt x ; M tt y ; Q tt x ; Q tt y : Total force system about the center of gravity of the foundation bottom: + N tt N tt nF .h . 0 mm tb M M + tt tt x 0x M ...
In there: + Select concrete for column neck and foundation of durability level B22.5 (grade 300) with R b = 130 kg/cm 2 ; R bt = 10 kg/cm 2 . + = (0.7÷0.9), is the longitudinal bending coefficient, approximated by = 0.9 => Choose b c = 200; l c = 300 N tt 0 Q tt 0 M tt 0 L p tt min min ...
0 - Subsidence stress at the bottom of element layers: i oh gl k In there: . gl + Ratio: L qu /B qu = 4.69/3.39 =1.4 0 + gl =24.62T/m2 : is the settlement stress at the bottom of the conventional foundation; + k 0i : is the stress coefficient at the center of the rectangle (L qu ...
