Plastic Design of Portal Frames

analysis angle of pitch apex axial load B₁ behaviour C₁ calculated centre bay chart for stanchion chions collapse loads collapse mechanism corresponding crane D₁ D₂ dead plus superimposed deflexions Design chart design example E₁ eaves end bays end moments end spans Engrs equations fixed base fixed-ended beam frame spacing free bending free bending-moment diagram full plastic full plastic moment give h₁ h₂ haunch HEYMAN hinges are formed HORNE Hunstanton School in.³ Instn Civ internal bays internal spans internal stanchions joist left-hand bay load factor M₁ M₂ major axis Mean axial stress mode of collapse multi-bay frame pinned base frame pinned foot pitched-roof portal plastic design plastic hinges plastic theory portal frame rafter section ratio of end reactant diagram reactant line redundancies reference FE sheeting rails shown in fig single-bay frame sketched in fig statically determinate superimposed loading tons per sq.in Weld wind loading