2、立桿穩(wěn)定性驗算根據(jù)《建筑施工承插型盤扣式鋼管腳手架安全技術(shù)標(biāo)準(zhǔn)》JGJ/T 231-2021公式5.3.1-2,考慮風(fēng)荷載時,可變荷載需考慮0.9組合系數(shù):小梁驗算q1=γ0×[1.3×(G1k+(G2k+G3k)×h)+1.5×0.9×Q1k]×s=1.1×[1.3×(0.3+(24+1.1)×0.42)+1.5×0.9×4]×0.25 = 5.361kN/m同上四~六步計算過程,可得:R1=6.174kN,R2=7.446kN,R3=7.446kN,R4=6.174kNRmax=Max[R1,R2,R3,R4]/0.5=7.446/0.5=14.893kN頂部立桿段:λ1=l01/i=1485.000/15.9=93.396查表得,φ=0.527不考慮風(fēng)荷載:N1=Rmax=15.345kNf=N1/(ΦA(chǔ))=15345.016/(0.527×424)=68.674N/mm2≤[f]/γR=300/1=300N/mm2滿足要求!考慮風(fēng)荷載:Mw=γ0×γQφcωk×la×h2/10=1.1×1.5×0.9×0.25×0.6×1.52/10=0.05kN·mN1w=Rmax+Mw/lb=14.893+0.05/0.9=14.948kNf=N1w/(φA)+Mw/W=14948/(0.527×424)+0.05×106/4490=78.033N/mm2≤[f]/γR=300/1...閱讀全文