60x
001845
2025-02-11

开裂状态下虚拟重心的有效惯性矩

III=bxII312+bxII(zII-xII2)2+αe,II(As,def,-z,(bottom)((def,-z,(bottom)-zII)2+As,def,-z,(top)(zII-def,-z,(top))2)

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