Principles Of Concrete-Filled Steel Tube (Cfst) – Applications And Developments Of Cfst – Researches On Cfst – Connections In Cfst Structures – Through-Beam Joint And Through-Column Joint – Exterior Stiffening Ring Joint (External Diaphragm – Joint) – Diaphragm-Through Joint – Vertical Stiffener Joint – Welded Haunch Joint – Anchored T-Plate Joint – Bolted Joint – Reinforced Cfsts – I: Cfst Reinforced By Inner Steel Tube (Including – Cfdst) – Ii: Cfst Reinforced By Inner Section Steel – Iii: Cfrp-Confined Cfst – Iv: Hollow Cfdst – Applications Of Cfdst – Monograph Organization – References – Analysis Of Axial Bearing Capacity – Tests And Phenomena – Calculation By Limit Equilibrium Method – Limit Equilibrium Method – Unified Strength Theory – Elastoplastic Limit Analysis – Calculation By Unified Theory Of Cfst – Method Of Unified Theory Of Cfst – Equivalent Confinement Coefficient – Calculation Formulas – Validation And Analysis – Parametric Study For Cfdst Column – Influence Of Inner Tube – A Simple Model Used In Optimum Design – Contribution Of Inner Tube – Summary – References – Compressive Stiffness Of Cfdst Columns – Compressive Stiffness Of Cfst – Simple Superposition Method .