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Performance-Based Seismic Design utilizing nonlinear time history analysis Seismic design and Evalaution of Air Traffic Control Towers(ATCT).

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AI Summary

 This session examines the engineering challenge of managing deep excavation in a constrained urban site, where strict deformation control, soft ground conditions, nearby existing structures, and high groundwater level must all be considered within a realistic construction sequence. We present a 3D deep excavation case study for a major development in Jakarta, Indonesia, highlighting the island method, its comparison with the strut method, and the foundation modeling approach used to evaluate secant pile behavior and staged construction under SNI 8640:2017. Participants will gain practical insight into how MIDAS GTS NX supports safe and realistic deep excavation analysis for complex basement and foundation projects. 

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Description

  • In this session, we will explore the seismic design and evaluation of Air Traffic Control Towers, focusing on why these structures require a different approach from conventional buildings. ATC towers often have complex structural systems, elevated control rooms, varying lateral stiffness along their height, and critical operational requirements that must remain functional after earthquakes.
  • The session presents key seismic damage observations from past ATC tower cases and introduces a detailed case study of the Urmia International Airport ATC Tower in Iran. Through linear analysis, response spectrum analysis, nonlinear time-history analysis, and performance-based evaluation, the presentation highlights how conventional force-based design methods can underestimate seismic demand in ATC towers.
  • Attendees will gain practical insight into higher-mode effects, drift concentration at upper levels, load sharing between steel moment-resisting frames and reinforced concrete cores, and the importance of Performance-Based Seismic Design for critical airport infrastructure.

Key Points

Linear Analysis VS Non-linear Time History Analaysis(NTHA)

Higher-Mode Effects and Drift Concentration at Upper Levels

Performance-Based Seismic Design(PBSD) for Critical Infrastructure

Speaker

Muhammadreza Vafaei Associate Professor, Universiti Teknologi Malaysia Universiti Teknologi Malaysia
Mohammadreza Vafaei (PhD, CEng, P.Eng., TS., M.ASCE, M.EERI, M.IET) is currently an associate professor in the faculty of civil engineering, Universiti Teknologi Malaysia (UTM), Johor, Malaysia. Before joining UTM, he has served many consulting companies and has led the seismic design of many structures. He is the ASCE 41-29 and ACF AICE Technical Committee member. His expertise includes seismic design and retrofitting of structures, vibration control through passive dampers, and structural health monitoring. 
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