>> P.276
7-597-4-4.断面の慣性モーメント、断面係数、回転半径その他断面の形状断面積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=ρ2aa21124a63aa12a289.0=2aa34a33aaa3577.0=2aaa2707.0=124a33118.026aa=aa12289.06=22ba-a2112-44baa6-ba442222289.012+baba+=22ba-aa2707.0=12-44baa-baa-ba124444118.0)(2=2222289.012+baaba+=bdd2112bd36bd2dd12289.0=bdd3bd33bd2dd3577.0=hkbd-d2112-33hkbdd6-hkbd33hkhkbdbdhk(bdbd12-hk--=-3333289.0)bd22dbbd+)(62233dbbd+22226dbdb+2222408.0)bd(6dbdbbd+=+bd)αsincos(21αbd+)αsincos(12dbd2222αb+×⎟⎞α⎟⎠⎜⎛⎜⎝++×αααsincossincosd6dbd2222bbαααα22222222sincos289.012+sincosbdbd+×=bd21d3236bd324bd2dd18236.0=bd21d12bd312bd2dd6408.0=
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