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    CIVIL NX Webinar
    Engineering Case Study   •   Design Challenges   •   Practical Insights
     
     
    From Concept to Analysis:
    Structural Behavior of Long-Span Prestressed Portal Frame Bridge Piers Using MIDAS CIVIL NX
    📅 31st August, 2026 (Monday)    |    🕒 3:00 PM – 4:30 PM (IST)    |    📍 Live on GoToWebinar
    Register Now →
       
    📝 Overview
    Long-span prestressed portal frame piers are increasingly adopted where conventional bridge substructures become impractical due to roadway geometry, clearance requirements, or architectural considerations.

    This webinar presents a real-world engineering case study demonstrating the complete structural analysis workflow using CIVIL NX. Participants will explore how portal frame bridge piers behave under gravity, prestressing, temperature, wind, and construction stages, along with practical modelling techniques and interpretation of analysis results.

    The session emphasizes engineering judgement rather than software operation alone, enabling designers to develop a deeper understanding of the behaviour of complex bridge substructures and make informed engineering decisions.
    01
    Structural Behaviour
    Understand the load path and structural response of long-span prestressed portal frame bridge piers under gravity, prestressing, temperature, wind, and other critical actions.
    02
    Analysis Workflow
    Explore a complete structural analysis workflow in CIVIL NX, from model development and loading to construction stages, analysis execution, and interpretation of results.
    03
    Engineering Insights
    Focus on result interpretation, model verification, and engineering judgement to better assess the behaviour and performance of complex bridge substructures.
    What You Will Explore
    ✓ Why long-span portal frame piers are adopted
    ✓ Structural load path and frame action
    ✓ Prestressing behaviour and critical considerations
    ✓ Effects of gravity, temperature, and wind loads
    ✓ Construction stage behaviour and analysis
    ✓ Practical modelling techniques in CIVIL NX
    ✓ Interpretation of moments, forces, stresses, and deflections
    ✓ Model verification and practical engineering lessons
    📌 Agenda
     
    00:00 – 00:10
    Welcome & Introduction
    Speaker background, objectives, and tools overview.
    00:10 – 00:20
    Why Portal Frame Piers?
    Challenges, alternatives, advantages, and applications.
    00:20 – 00:30
    Structural Behavior
    Load path, frame action, prestressing, and design considerations.
    00:30 – 01:00
    MIDAS CIVIL NX Modelling LIVE DEMO
    Geometry, materials, boundaries, tendons, construction stages, moving loads, and combinations.
    01:00 – 01:15
    Results Interpretation
    Stresses, moments, deflections, stability, serviceability, and strength.
    01:15 – 01:25
    Practical Lessons
    Common mistakes, verification, recommendations, and quality checks.
    01:25 – 01:30
    Q&A and Close
    Open floor for attendee questions and discussion.
     
    By the End of This Webinar You Will Be Able To
    ✓  Understand when portal frame piers become the preferred structural solution.
    ✓  Understand the structural behaviour of long-span prestressed portal frames.
    ✓  Apply practical modelling techniques using CIVIL NX.
    ✓  Perform construction stage analysis and understand prestressing sequences.
    ✓  Evaluate time-dependent effects including creep, shrinkage, and relaxation.
    ✓  Understand load combinations in accordance with the BS 5400 design code.
    ✓  Interpret bending moments, axial forces, deflections, and support reactions.
    ✓  Identify common modelling mistakes and improve analysis reliability.
    🎙️ Meet the Speaker
    Er. Ranil Sampath
    Er. Ranil Sampath
    Chartered Engineer (CEng)
    Institution of Engineers, Sri Lanka
    Education
    M.Sc. in Structural Engineering
    University of Moratuwa, Sri Lanka
    Ranil Sampath is a Chartered Civil Engineer with over 15 years of professional experience in the analysis, design, construction, and assessment of major bridge structures in Sri Lanka. His work spans prestressed concrete bridges, extradosed bridges, steel bridges, portal frame structures, and complex highway infrastructure projects.

    He currently serves as a Bridge Design Engineer, where he has been involved in the structural design and technical review of numerous national highway and expressway bridge projects. His expertise includes finite element modelling, construction stage analysis, prestressed concrete design, and advanced bridge analysis using MIDAS CIVIL and other commercial software.

    Ranil also actively contributes to the engineering profession through technical presentations and knowledge-sharing sessions, with a focus on translating complex structural engineering concepts into practical design solutions.
    Technical Skills
    MIDAS CIVIL NX · Post-Tensioned Bridge Design · Finite Element Analysis · Extradosed Bridge Design