Skyscraper design was once governed almost entirely by strength — could the frame carry gravity, wind and seismic loads with adequate margin? For the new generation of ultra-slender “pencil towers,” the governing requirement has shifted to something more subtle: occupant comfort. A building can be… Read more
Measuring the Eiffel Tower’s Natural Frequencies with a Smartphone | VibrationData VibrationData · Field MeasurementT. Irvine · Paris · 11 Jul 2026 Measuring the Eiffel Tower’s Natural Frequencies with a Smartphone Two short accelerometer records on the summit deck captured five of the tower’s first… Read more
Incident Summary On the morning of July 7, 2026, construction workers on the 21st floor of 235 East 42nd Street in Midtown Manhattan discovered structural steel columns buckling before their eyes, along with bending box beams, cracks, and sagging floors. The 37-story tower — the… Read more
The Transamerica Pyramind has a Fundamental Frequency of 0.3 Hz * * * Here are some papers which give natural frequencies and damping values for sample tall buildings: Damping in Tall Buildings and Towers: tall_building_damping.pdf The Damping Characteristics of Bolted and Welded Joints: bolted_joint_damping.pdf Transamerica… Read more