ETABS Seismic Tip: Reduce Structural Torsion, Why Your Structure Has Torsional Irregularity? #ETABS

In this ETABS structural engineering tutorial, we discuss a practical method to reduce torsional irregularity by modifying the stiffness distribution of lateral load resisting elements. Many engineers face torsional irregularity problems during seismic analysis and design, especially in buildings with irregular geometry, asymmetric stiffness distribution, or nonuniform plan layouts. In this video, we analyze: ✔ Why torsional irregularity occurs ✔ How to identify soft and stiff sides of a structure ✔ The relationship between Center of Mass and Center of Rigidity ✔ How beam stiffness affects torsional response ✔ How changing member dimensions can improve structural behavior ✔ Why exterior frames contribute more to torsional stiffness ✔ How to reduce Max/Avg diaphragm drift ratio in ETABS This tutorial includes: • ETABS modeling tips • Drift visualization techniques • Practical seismic engineering concepts • Structural stiffness balancing methods • Torsional response interpretation Engineering Concepts Covered: Torsional Irregularity Seismic Structural Behavior Center of Rigidity Center of Mass Lateral Load Resisting Systems Structural Stiffness Distribution Drift Control Diaphragm Behavior Flexural Stiffness Torsional Stiffness Codes & References Mentioned: • ASCE 7 • ACI 318 • ETABS Documentation • Seismic Design Principles • Structural Dynamics Concepts Software Used: ETABS If you enjoy professional structural engineering tutorials, subscribe for more ETABS, SAFE, SAP2000, seismic design, and reinforced concrete engineering content. #ETABS #StructuralEngineering #CivilEngineering #EarthquakeEngineering #SeismicDesign #TorsionalIrregularity #ETABStutorial #StructuralAnalysis #BuildingDesign #ConcreteDesign #ACI318 #ASCE7 #Engineering #DriftControl #StructuralDynamics