Mixed and Composite Structures (250475) – Course 2024/25 PDF
Contents
Introduction to the subject. Concept of structure and composite construction. Presentation of the agenda. Evaluation method. Bibliography. Advantages and disadvantages of building in steel and concrete. Advantages and characteristics of composite construction. Possibilities in design and construction: construction process relevance. Materiales: Structural steel, steel reinforcement, concrete
Dedication
3h Large group + 4h 11m Self StudyQualitative structural behavior of composite structures. Differential equation of the interaction. Full interaction: Method of the reduced cross-section. Longitudinal shear force. Transverse reinforcement of the concrete slab. Effective width: Statement of the effective width according to EC3 and EC4. Time dependent effects: Shrinkage: Structural effects in isostatic and indeterminate structures. Analysis considering cracking: Non-linearity of the problem. Creep: The nature of the phenomenon. Approaching the problem with the ageing coefficient. The method j. Analysis of continuous composite beams considering creep. Thermal effects in composite structures and composite bridges. Design temperature distributions. Generalized deformations. Calculation of a composite structure subjected to a differential action type as shrinkage.
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyThe prestressed composite structures: Prestressed pre-connection and post-connection. Instantaneous and delayed study. Efforts flush of localized nature. Resolution of exercise for determining the ultimate moment of a section subjected to bending mixed positive and negative, considering linear elastic and plastic theory.
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyUltimate limit states. Classification of composite sections. Ultimate strength of the cross sections of a composite beam. Ultimate bending moment: Bases. Plastic bending moment of a section with total connection. Plastic bending moment of a section with partial connection. Ultimate bending moments response in classes 1, 2, 3 and 4 to positive and negative bending. Resistance of the composite section to shear in sections class 1 and 2. Bending-shear interaction. Exercise
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyServiceability limit states: General. Limit state deformations: effects of the construction process, the shear lag, incomplete interaction of shrinkage and creep, cracking of concrete and structural steel lamination. Limit state of cracking: Approach to EN 1992-1-1 and Instruction EHE. Simplified method of EN 1994-1-1. Resolution of exercise of verification of the limit state of cracking in an intermediate support cross-section of a continuous composite beam.
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyConstruction process. Influence of the construction process. Influence of preloads. Sequences isostatic concrete beams. Influence of the construction process in continuous composite beams: Sequences of concretecast and bearing systems. Metal piece fully assembled or not, before executing the concrete slab. Resolution of an exercise related to the construction process of a steel-concrete composite structures
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyConnectors. Connection concept. Vs. total connection. partial connection. Justification for the partial connection. Vs ductile connectors. rigid connectors. Strain capacity of the connectors. Connections tested with push tests. Flush effort calculation: Beams with past efforts and calculated according to elastic theory under plastic theory. Total and partial connection connection with connectors dúctiles.Capacidad resistant ductile or last of the connectors: Pin connectors. Other types of connectors. Distribution connectors along the element. Limitations. Construction layout. Transverse reinforcement in the connection area. Resolution of exercise related to the design of connection in composite beam
Dedication
3h Large group + 3h Medium group + 8h 23m Self StudyComposite columns. Overview. Structural types. General and simplified method. Assumptions for the simplified method. Resistance of the cross-section. Flexure-compression strength in straight sections. NM interaction diagram. Influence of shear. Resistance to instability of pillars under biaxial bending in the general case. Influence of second-order effects. Study of the area of load introduction area. Shear at the intreface and connection in the steel-concrete interface. Resolution of exercise of the verification of a composite column under axial load and biaxial bending
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyComposite bridges. Introduction. About composite bridges. Common types of cross sections. Design conditions of composite bridges. Presentation of structural types of composite bridges. Some aspects of their calculation.
Dedication
3h Large group + 4h 11m Self StudyComposite slabs with profiled sheet. Introduction. Behaviour of the composite slab. Basis of calculation. Structural analysis. Checking sections. Checking the serviceability limit states. Resolution of exercise of composite slab with profiled sheet
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyTime dependent effects. Longitudinal shear force. Shear-friction model. Exercise
Dedication
2h Large group + 1h Medium group + 4h 11m Self StudyDedication
3h Laboratory classes + 4h 11m Self Study