原來當學術運用到現實應用時,最難唔係d算式點計,而係搵返題目原本設定既數值先頭痕。
例如
(1) Design for girder depth span/10
Take the overall depth of the grider as 1200 mm and assume that the flange plates are over 40mm thick. Then the design strength from BS 5950: Part1, Table 6, for plates is py=245N/mm^2.
The flanges resist all the moment by a couple with lever arm of, say, 1140mm, as shown in Figure 6.16(a). The flange area is:=5232 x 10^6 / (1140 x 245) = 18733mm^2
我要計既,唔止係 18733mm^2咁簡單,仲要搵返現實上 1200mm, 40mm, table py值,及1140mm等數值。
計唔難,搵呢d數值先頭痕。
不過...能學以致用,沒有浪費大學三年所讀,可謂人生既滿足又充實的一刻。