2×3.5×(0.5×3.5+1.5+3.64)+(93.73-42)×3.5×0.5×(1/3×3.5+5.14)] +[90.27×1.5×(0.5×1.5+3.64)+(111.15-90.27)×0.5×1.5×(1/3×1.5+3.64)]+[81.39×3×(0.5×3+0.64)+10.5×3×0.5×(2/3×3+0.64)] =2807.12kN•m/m
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