基数级跨中弯距Mka:
Mka= (Md+Mf) × VZ/VJ+ΔMs/VJ -Ms
Mka= (Md+Mf)×1.017/1.0319+△Ms/1.0319-Ms
=(17364.38+0)×1.017/1.0319+4468.475/1.0319-164.25 = 21279.736(kN·m)
计算各加载级下跨中弯距:
Mk= (k(Mz+Md+Mh+Mf) -Mz) × VZ/VJ+ΔMs/VJ -Ms
Mk=(k(Mz+Md+Mh+Mf) -Mz)×1.017/1.0319 +△Ms/1.0319―Ms
=(k (31459.38+17364.38+24164.75+0)-31459.38)×1.017/1.0319+4468.475/1.0319-164.25
=71934.601×k-26839.0389(kN·m)
计算静活载级系数:
Kb = [Mh/(1+μ) +Mz+Md+Mf]/(Mh+Mz+Md+Mf)
Kb= [24164.75/1.127+31459.38+17364.38+0]/ (24164.75+31459.38+17364.38+0)
=0.963
计算基数级荷载值:
Pka=Mka/α=21279.736/54.75=388.671(kN)
计算各荷载下理论挠度值:
f = 2 P [ L+2 (L/2-Χ1)(3L-4(L/2-Χ1)) +2 (L/2-Χ2)(3L-4(L/2-Χ2)) ] / 48EI/1000
=0.01156P
基数级跨中弯距Mka:
Mka= (Md+Mf) × VZ/VJ+ΔMs/VJ -Ms
Mka= (Md+Mf)×1.017/1.0319+△Ms/1.0319-Ms
=(17364.38+0)×1.017/1.0319+4468.475/1.0319-164.25 = 21279.736(kN·m)
计算各加载级下跨中弯距:
Mk= (k(Mz+Md+Mh+Mf) -Mz) × VZ/VJ+ΔMs/VJ -Ms
Mk=(k(Mz+Md+Mh+Mf) -Mz)×1.017/1.0319 +△Ms/1.0319―Ms
=(k (31459.38+17364.38+24164.75+0)-31459.38)×1.017/1.0319+4468.475/1.0319-164.25
=71934.601×k-26839.0389(kN·m)
计算静活载级系数:
Kb = [Mh/(1+μ) +Mz+Md+Mf]/(Mh+Mz+Md+Mf)
Kb= [24164.75/1.127+31459.38+17364.38+0]/ (24164.75+31459.38+17364.38+0)
=0.963
计算基数级荷载值:
Pka=Mka/α=21279.736/54.75=388.671(kN)
计算各荷载下理论挠度值:
f = 2 P [ L+2 (L/2-Χ1)(3L-4(L/2-Χ1)) +2 (L/2-Χ2)(3L-4(L/2-Χ2)) ] / 48EI/1000
=0.01156P