【单选题】77 / 86双摩擦面nf=2n_f=2nf=2,μ=0.45\mu=0.45μ=0.45,P=155 kNP=155\,\mathrm{kN}P=155kN,单栓摩擦型抗剪承载力约为?A126 kN126\,\mathrm{kN}126kN正确B70 kN70\,\mathrm{kN}70kNC155 kN155\,\mathrm{kN}155kND310 kN310\,\mathrm{kN}310kN参考答案A参考解析Nvb=0.9×2×0.45×155=125.55 kNN_v^b=0.9\times2\times0.45\times155=125.55\,\mathrm{kN}Nvb=0.9×2×0.45×155=125.55kN