What is time history analysis?
Time history analysis is a step-by- step analysis of the dynamic response of a structure to a specified loading that may vary with time. Time history analysis is used to determine the seismic response of a structure under dynamic loading of representative earthquake (Wilkinson and Hiley, 2006) (Tables 1 and 2)..
How do you calculate time in ETABS?
As per the formula provided in IS code (IS 1893(part1):2002), the time period value obtained, . = 0.7475 sec Where h=height of the building in the model provided h=21.45m The above calculation is done manually just considering the overall height of the building.
What is time history analysis in Etabs?
Time-history analysis provides for linear or nonlinear evaluation of dynamic structural response under loading which may vary according to the specified time function. Dynamic equilibrium equations, given by K u(t) + C d/dt u(t) + M d2/dt u(t) = r(t), are solved using either modal or direct-integration methods.
What are time histories?
The time history is the sequence of values of any time-varying quantity (such as a ground motion measurement) measured at a set of fixed times. Also termed time series.
What is time period of a building?
Period of building and its relation with frequency: The natural period of a building is simply a time taken by it to undergo one complete cycle of oscillation. The natural period is one of the properties or building which is controlled by mass and stiffness.
What is time period in earthquake analysis?
Answer and Explanation: In seismic analysis, time period refers to the time a building or structure takes to complete one oscillation, which means the building moves as the wave passes and returns to its starting position in a single oscillation.
What is nonlinear time history analysis?
Nonlinear time history analysis is known for simulating a structure behavior under severe earthquake more proper than other methods.
What is time history load?
The time history load function is applied to the node specified. For seismic time history analysis, the node should be identified as ALL to indicate that the acceleration load is applied to the entire model.
How do you create a response spectrum from time history?
For a certain given time history, , a response spectrum is created in the following way:
- Select a frequency range for which the spectrum should be generated.
- Select a frequency step that determines how many points on the response spectrum should be computed.
- Select a certain damping ratio,
What is pushover analysis?
Pushover analysis is a static procedure that uses a simplified nonlinear technique to estimate seismic structural deformations. Structures redesign themselves during earthquakes. As individual components of a structure yield or fail, the dynamic forces on the building are shifted to other components.