钢绞线分段 L(m)修正 L(m) Δ x 切线角(度) θ(rad) k u kl+u θ e-(kl+u θ ) 控制应力Mpa 截面积mm2 AB 6.3859 6.3859 0 0 0.0015 0.25 0.00957885 0.99047 1395 140 BC 2.8798 2.8798 5.5 0.0959 0.0015 0.25 0.02830581 0.97209 1395 140 CD 0.537 0.537 0 0 0.0015 0.25 0.0008055 0.99919 1395 140 AB 4.925 4.925 0 0 0.0015 0.25 0.0073875 0.99264 1395 140 BC 2.8798 2.8798 5.5 0.0959 0.0015 0.25 0.02830581 0.97209 1395 140 CD 2.015 2.01