Effect of modulus of subgrade reaction on Deep beams

Abstract

Deep beams are one of the widest used members in construction due to their high rigidity and significant bending resistance. It used usually at high rise buildings, bridges, dick slabs and foundations. The beams may rest on soil in many cases like strap footing. Timoshenko beam theory and Fourier series were used for derivatizing the behavior of deep beams which rest on soil grade. Many parameters were investigated like modulus of subgrade reaction, beams dimensions and loading type. It was concluded that, the rigidity of deep beam is high in amounts that cancelling the effect of modulus of subgrade reaction. The beam width increases the bearing pressure of the soil and working on enhancing the stability of the beam and keeps it rest well on the soil so that increasing the width of beam led to minimizing sinking the beam into the soil so that reducing the deflection. Furthermore, increasing the height of the deep beam leads to minimizing the deflection of beam due to rising the shear resistance capacity of the beam which depends in the first degree on the beam thickness.