(DETAIL 1)
(DETAIL 2)
Figure 9.2: Typical details of tie connections
9.3 Resistance of unstiffened vertical walls
(1) The resistance of vertical walls should be evaluated in accordance with EN 1993-1-7.
Alt
ernatively, the provisions set out in 9.4 may be deemed to satisfy the provisions of that Standard.
(2) The resistance of vertical walls should be evaluated considering both the membrane and plate
bending actions.
(3) The actions on the unstiffened plate may be divided into the following categories:
− bending as a 2D plate from the stored material;
− stresses resulting from diaphragm action;
− local bending action from the stored material and/or equipment.
9.4 Resistance of silo walls composed of stiffened and corrugated plates
9.4.1 General
(1) The resistance of unstiffened parts of vertical walls should be evaluated in accordance with the
pro
visions set out in 9.4. The resistance evaluation should consider both membrane and plate bending
actions.
(2) Horizontally corrugated plates should be designed for:
− general bending action from pressures due to the stored material;
− stresses resulting from their diaphragm action;
− local bending action from the stored material and/or equipment.
(3) Effective bending properties and bending resistance of the stiffened plates should be derived in
accordance with the provisions for trapezoidal sheeting with intermediate stiffeners in EN 1993-1-3.
(4) The design of the stiffeners should be made in accordance with member design given in
EN1993-1-1 and EN1993-1-3, taking into account the compatibility of the stiffeners with the wall
elements, the effect of the eccentricity of the sheeting in relation to the stiffener-axes, and the flexural
continuities of wall elements and intersection horizontal and vertical stiffeners. Stresses normal to the
longitudinal axis arising in stiffeners, which intersect structurally continuous wall-elements, should be
taken into account additionally in the member design.
(5) The load transfer of vertical stiffeners to base boundary elements should be designed in
accordance with the specific element and the given foundation resistance.