In 1961 the 60-story Chase Manhattan Bank Building, designed by Skidmore, Owings & Merrill, had a standard steel frame with rigid portal wind bracing, which required 275 kilograms of steel per square metre (55 pounds of steel per square foot), nearly the same as the Empire State Building of 30 years earlier.
The distribution variation and correlation of envelope interference factor (EIF) of the base torsion responses for principal building were studied by applying the rigid model wind tunnel test.
In formulating the model for predicting aircraft response at flight conditions using rigid model wind tunnel pressure measurements, the wing (fin) is divided into panels, and the load is computed from measured pressure fluctuations at the center of each panel.
Colored flags, frayed and sodden, held rigid by the wind, said, "Open" and "Welcome" and "Antiques" and "Donuts" and "Gallery" and "Sale" but attracted no customers.
Firstly, synchronous pressure measurement on the billboard of a rigid model in wind tunnel is carried out.
Not one so rigid that you wind up hamstrung, but more like a theme that allows for variation -- general ideas you can go back to again and again, varying them to fit your mood, the season and what seems best.
The system consists of an elastically mounted rigid wing on a rig fixed in a wind tunnel.
In this paper, experimental investigation of rigid heliostat model in wind tunnel under 3-dimensional wind loads was conducted.
Jenney's Manhattan Building (1891) had the first vertical truss bracing to resist wind forces; rigid frame or portal wind bracing was first used in the neighbouring Old Colony Building (1893) by the architects William Holabird and Martin Roche.
Wind tunnel tests for rigid body were performed to determine the wind loads distribution pattern on the surface of group tower under different four-tower arrangements.
