Damage and Distortion Criteria for Residential Slab-on-Grade Structures

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Abstract
Various criteria have been suggested throughout the geotechnical and construction community for maximum allowable differential movement for foundation systems. However, the writers have found very few papers pertaining just to slab-on-grade systems. Furthermore, our literature review indicates that most of these criteria have been developed through studies of soil settlement, irrespective of other modes of soil movement, and do not necessarily pertain to residential slab-on-grade structures. There are many different soil/geologic processes that can operate at a given site, each of which can affect the performance of an overlying structure in a different manner. For example, at the same development a house founded on fill of varying depths (differential fill) may settle somewhat uniformly, producing little distortion, whereas a house founded on expansive bedrock may experience “heave” or “edge curl,” resulting in higher levels of foundation distortion. The house settling uniformly may experience an overall...
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