m2)Р125Р主梁截面抵抗矩W(cm3)Р5.08Р主梁弹性模量E(N/mm2)Р206000Р主梁自重标准值Nz(kN/m)Р0.038Р主梁验算方式Р三等跨连续梁Р 横向支撑钢管按照均布荷载和集中荷载作用下三等跨连续梁计算,集中荷载P取板底支撑钢管传递最大支座力。Р 满堂支撑架平台上无集中力Р q=1.2×Nz=1.2×0.038=0.046kN/mР q'=Nz=0.038kN/mР p=Rmax/2=3.508/2=1.754kNР p'=R'max/2=2.539/2=1.27kNР 计算简图Р 弯矩图(kN·m)Р Mmax=0.568kN·m Р σ=Mmax/W=0.568×106/(5.08×103)=111.811N/mm2≤[f]=205N/mm2Р 满足要求!Р 剪力图(kN)Р Rmaxf=4.036kNР Vmaxf=2.255kNР τmax=2Vmax/A=2×2.255×1000/489=9.223N/mm2≤[τ]=125N/mm2Р 满足要求!Р 变形图(mm)Р νmax=1.692 mm≤min{1200/150,10}=8mmР 满足要求!Р 满堂支撑架平台上增加集中力最不利计算Р q=1.2×Nz=1.2×0.038=0.046kN/mР q'=Nz=0.038kN/mР p=Rmax/2=3.508/2=1.754kNР p'=R'max/2=2.539/2=1.27kNР p2=Rmaxf/2=5.269/2=2.635kNР p2'=R'maxf/2=3.797/2=1.899kNР 计算简图Р 弯矩图(kN·m)Р Mmax=0.726kN·m Р σ=Mmax/W=0.726×106/(5.08×103)=142.913N/mm2≤[f]=205N/mm2Р 满足要求!Р 剪力图(kN)Р Rmaxf=4.715kN