Structural Analysis: Collapse of the WTC Twin Towers
Credits: 2 PDH
PDH Course Description:
This course presents a technical investigation of the structural failure and progressive collapse of the World Trade Center Twin Towers (WTC 1 and WTC 2) on September 11, 2001. Designed for professional engineers, this course examines the complex interaction of structural loading, material behavior, fire dynamics, and failure progression that led to the total collapse of two of the most iconic high-rise structures in history. Emphasis is placed on forensic structural engineering principles, finite element modeling, and the role of national investigations, with a critical review of findings from the National Institute of Standards and Technology (NIST).The course integrates concepts in fire-resistant design, energy absorption, and failure criteria within a performance-based engineering context, providing engineers with valuable insight into large-scale structural failures and their implications for design practice.
Topics:
- Describe the original architectural and structural design features of the World Trade Center Twin Towers.
- Analyze the structural effects of aircraft impact and fuel-induced fires on steel framed high-rise structures.
- Evaluate the material and thermal behavior of structural steel under fire-induced loading conditions.
- Explain the mechanisms of local failure, load redistribution, and vertical progression leading to global collapse.
- Assess the methodologies and conclusions of the NIST investigation into the WTC collapse.
- Identify critical lessons for structural engineers concerning robustness, redundancy, and design under extreme loading.
- Apply forensic engineering principles to real-world structural failures and integrate findings into modern design practice.
To take this course:
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3.) Test: Once you've thoroughly read the course materials, please click below to take the final examination.
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4.) Certificate: A passing grade of 70% or higher on the exam, is required to receive the certificate of completion for this PDH course.
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Intended Audience: This course is intended for civil, construction, structural, architectural, and other engineering professionals whose job description may require a general knowledge of structural failure mechanisms within mid and high rise structures.
Publication Source: Cadistics Courseware
Donald Parnell, PE