Static Pushover Method for the Seismic Analysis of Structures


During the last twenty years the use of a static pushover analysis of many different types of structures has increased significantly. The maximum static displacement from such an analysis is referred to as the Displacement Capacity of the structure. The Demand Displacement is then estimated from a linear elastic time history earthquake analysis of the structure. (In the case of a design earthquake spectrum input, the CQC method of modal combination is used to combine the modal responses to estimate the Demand Displacement). The Demand/Capacity ratios calculated by this approach must be less than 1.0 to prevent collapse.

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