Advanced Structural Behaviour of Composite Steel and Concrete Systems

Composite steel and concrete systems are widely used in modern buildings because they combine the strength, stiffness, and efficiency of both materials. While design codes provide established approaches for composite members and floor systems, the real behaviour of composite structures is often governed by factors that extend beyond routine design calculations. Structural engineers must understand how forces are transferred between materials, how stiffness evolves throughout construction and operation, and how long-term effects influence structural performance.

As buildings become taller, spans become longer, and structural systems become increasingly complex, advanced behavioural considerations become critical to achieving safe, efficient, and economical designs. Differential shortening, creep, shrinkage, connection behaviour, diaphragm action, vibration performance, stability effects, and construction-stage loading can significantly influence both structural response and serviceability. In many projects, these considerations govern design outcomes as much as ultimate strength requirements.

This session examines the advanced structural behaviour of composite steel and concrete systems, focusing on the mechanisms that influence strength, stability, serviceability, and long-term performance. Participants will gain practical insight into load transfer, structural interaction, construction-stage behaviour, and detailing considerations, while exploring lessons learned from high-rise, long-span, and complex building structures. The course provides a deeper understanding of the engineering principles that underpin successful composite structural design.

Key Topics Discussed:

• Composite action and force transfer mechanisms
• Load sharing between steel and concrete elements
• Shear connection behaviour and performance
• Global stability and second-order effects
• Diaphragm action and structural interaction
• Creep, shrinkage, and differential shortening
• Construction-stage loading and temporary conditions
• Serviceability, deflection, and vibration performance
• Composite floor systems and long-span structures
• Transfer structures and complex load paths
• Connection detailing and robustness considerations
• Lessons from high-rise and major infrastructure projects