Science, asked by ujjawalsharma7795, 1 year ago

Methods of seismic analysis of structures

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Answered by arinder
1
Structural analysis methods can be divided into the following five categories.

☆Equivalent static analysis : This approach defines a series of forces acting on a building to represent the effect of earthquake ground motion, typically defined by a seismic design response spectrum. It assumes that the building responds in its fundamental mode.


☆Response spectrum analysis : This approach permits the multiple modes of response of a building to be taken into account (in the frequency domain). This is required in many building codes for all except very simple or very complex structures.


☆Linear dynamic analysis :
Static procedures are appropriate when higher mode effects are not significant. This is generally true for short, regular buildings. Therefore, for tall buildings, buildings with torsional irregularities, or non-orthogonal systems, a dynamic procedure is required.


☆Nonlinear static analysis :
In general, linear procedures are applicable when the structure is expected to remain nearly elastic for the level of ground motion or when the design results in nearly uniform distribution of nonlinear response throughout the structure.

☆Nonlinear dynamic analysis :
Nonlinear dynamic analysis utilizes the combination of ground motion records with a detailed structural model, therefore is capable of producing results with relatively low uncertainty.

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