满堂支架荷载计算钢管立杆、横杆容许荷载立杆横杆步距m允许荷载KN横杆长度(KN)允许集中荷载KN允许均布荷载KN0.6400.96.7714.811.2301.25.0811.111.4251.54.068.81.8201.83.397.2验算荷载组合及计算q1:顶板自重荷载新浇混凝土取2600KN/m³q2:顶板底模荷载取1.0=q2KPaq3:施工人员机具按均布荷载取1.0KPaq4:振捣混凝土产生的荷载底板2.0KPaq5:新浇混凝土对侧模的压力q6:倾倒混凝土产生水平荷载取2.0KPaq7:支架自重立杆横向间距、纵向间距、横杆步距支架自重q760cm×60cm×60(或)903.3860cm×60cm×1202.9460×90×1202.2190×90×1201.84q1=26×0.8=20.8取1.2的安全系数2.08×1.2=24.96q5新浇混凝土对侧模压力q5=krh=1×26×0.8=20.8q6倾倒混凝土产生水平荷载2.0KPa支架结构验算钢管支架采用60×60×120立杆N=1.2(NG1K+NG2K)+0.85×1.4∑NQKNG1K支架自重产生轴向力NG2K构配件自重∑QK施工荷载NG1K=0.6×0.6×q1=0.36×20.8=7.48NG2K=0.6×0.6×1=0.36∑QK=0.6×0.6×(q3+q4+q7)=0.36×(1.0+2.0+2.21)=1.87N=1.2×(7.48+0.36)=0.85×1.4×1.87=9.40+2.22=11.62≤40KN立杆稳定性Φ48×3.5i=1.58mm长度附加系数1.55步距1.2L=1.2×1.55=1.86λ=L/i=117Φ=0.32N/ΦA=11.62÷489÷0.32=75有风时产生弯矩Mw=0.85×1.4×Wk×L2×h²/10Wk=0.7U2×Us×W0=0.7×1.38×1.2×0.8=0.927L=0.6h=1.2Mw=0.85×1.4×0.92×0.6×1.2²/10=0.0953W=5.08×10³mmMw/w=0.095×1000000/5.08×10³=1975+19<205支架稳定