Cracking of a Tilt-Up Structure Due to Dynamic Loads

by M. Saiidi, Univ of Nevada, Reno, NV, USA,
P. A. Ferrari, Univ of Nevada, Reno, NV, USA,



Document Type: Proceeding Paper

Part of: Dynamics of Structures

Abstract:

The extensive cracking of a tilt-up reinforced concrete structure is discussed. The site investigation revealed horizontal cracks at two feet to seven feet above a mezzanine level which is practically supported by the wall panels. The cracks extended through the wall thickness. The most likely cause of the cracks was identified as the vibration of the mezzanine floor caused by a compressor which had been in operation and removed prior to the investigation. No information on the compressor was available. Two analytical models of the wall structure were developed, a static and a dynamic model. The static model failed to explain the cracking. Based on the dynamic analysis, however, a plausible range of input frequency and input amplitude could be identified which would cause cracks at the locations of the actual cracks.

Subject Headings: Dynamic loads | Cracking | Structural dynamics | Dynamic models | Concrete structures | Walls | Structural models

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