>> P.279
7-62第7章断面の形状断面積A中立軸より最遠部までの距離e慣性モーメントI断面係数eIZ=回転半径AI=ρashtbs++saA2-(d[s-bd(-tt-)]t)s2d÷+)(+22]-)se)()((())([b313333edttabsaeed------+-eIAIhtbs+)-bs(2s+t)(2+2htbtdd-]))((b)([te)(31+]))((b)([te31333333sedtedbhtbseIZsedtedbI-----+==-----+=ρ+2)(Tthbs+ThA(63[-h)]ht)(+3+s3d(+bst-s)d÷+2233)(A)]3(t4[121-sedThbs--++eIAI)(tbat-+)a+(2d)a+2(2d+dtb-]))(()([)(3t1+]))(()([31333333tebtaebatetbaeIZtebtaebateI-----+-==-----+=ρ)(tbat-+))b+b+(2c2(2c+cta-]))((b)([te)(3t1+]))((b)([te31333333tebteabtbaeIZteateabI-----+-==-----+=ρ)](2[tbta-+2b12(cb)2t33ab--bc6(bt2ab)33--2))]tt-(2(bb12[abt-33a-c+)](2[tbta-+2a-2t)]6a(22c12[tb)c+()td-2(6-62a)(122c6)(233233233t--adcdabcdac-cabZcdadcabI+-=+=--+=ρ)(24π2dhbd-+2h])16(3hπ)(121b3334ddhbd-+⎢⎣⎡-+])16(3hπ)(1bh63334ddhbd-+⎢⎣⎡-+AI
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