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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

 

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