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U TR BLOCK, INC. <br />SEISMIC CALCULATIONS <br />The loads considered under seismic loading are primarily inertial loadings. The wave passes the structure <br />putting the mass into motion and then the mass will try to continue in the direction of the initial wave. In the <br />calculations you see the one dynamic earth pressure from the wedge of the soil behind the reinforced mass, and then <br />all the other forces come from inertia calculations of the face put into motion and then trying to be held in place. <br />Design Ground Acceleration <br />Horizontal Acceleration [kh = A/2] <br />Vertical Acceleration <br />INERTIA FORCES OF THE STRUCTURE <br />Face (Pif) = (W1)"kh(ext) = 2115.19 *0.075 <br />SEISMIC THRUST <br />Kae <br />D_Kae = Kae - Ka = (0.286 - 0.000) <br />Pae = 0.5" gamma"(H)^2"D_Kae <br />Pae_h = Pae"cos(6) <br />Pae_v = Pae" sin(6) <br />TABLE OF RESULTS FOR SEISMIC REACTIONS <br />Name Force (V) Force (H) X-len Y-len <br />Face Blocks(WI) 2115.191 -- 1.229 -- <br />Soil Block( <br />Pa h <br />Pif <br />Pae_h <br />Pae v <br />A =0.150 <br />kh =0.075 <br />kv =0.000 <br />Pif=111.02 ppf <br />Kae =0.286 <br />D_Kae =0.032 <br />Pae =51.65 ppf <br />Pae_h =47.66 ppf <br />Pae_v =19.91 ppf <br />Mo &t <br />-- 2599.92 <br />0.0 <br />W2) <br />0.0 <br />-- <br />_0.0 -- - <br />-- 1.667 634.15 <br />-- 3.0 333.07 <br />-- 3.0 142.99 <br />-- <br />380.492 <br />-- <br />111.024 <br />- <br />47.663 <br />19.905 <br />-- <br />2.458 <br />--- I- - <br />48.93 <br />UltraWall 4.0.16287.0 Page 11 <br />