TIME HISTORY ANALYSIS IN ETABS PDF

Seismic Analysis & Design of 10 Story RC Building (Time History Analysis) Using ETABS (Metric Units) ACECOMS, AIT yg 0 0 2 4 6 8 10 12 The vibration mode shape vectors obtained from theoretical calculations are exactly matching mode shapes obtained from ETABS analysis by normalizing at top floor. Time history of top story displacement record obtained from Newmark's Method is similar to that of ETABS response time history. Comparison between FNA and direct-integration time-history analyses Periodic time-history analysis for two applied loads with different.


TIME HISTORY ANALYSIS IN ETABS PDF

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TIME HISTORY ANALYSIS IN ETABS PDF


Define mass source Define mass source to calculate seismic weight of building.

ETABS-Time history analysis-Detailed steps and Information | Prasad Vaidya -

There is not much differences in results was observed in above two procedures. If the initial load vector is considered as unstressed condition no additional case needs to be defined. If the time history lateral case is suppose to start from some defined gravity case a gravity nonlinear time history case must be defined with dead time history analysis in etabs and scale factor as 1.

TIME HISTORY ANALYSIS IN ETABS PDF

The number of time steps may be less than lateral time history case for eg it may be steps of 0. The starting vector is recommended as dead load since this load will initially be there on structure before earthquake event occur and hence assigning the starting time history analysis in etabs vector will give more realistic results.

Define mass source Define mass source to calculate seismic weight of building. Mass source is used in modal analysis and time history uses modal analysis results.

Non-Linear Time History Analysis using ETABS 2016.How to check the Hinge Status?

Define load case data Load type — Acceleration Load Name — U1 Function — Time history analysis in etabs Scale factor- If the values of time history function is given in the current units the scale factor is set to 1 otherwise scale factor should reflect conversion of time history to current unit.

Its efficiency is due to the separation of non linear object force vector.

TIME HISTORY ANALYSIS IN ETABS PDF

The building offer least resistance when shaken by its natural frequency. Hence it undergoes larger oscillation when shaken by natural frequency than other frequencies. The natural period for 1 to 20 storey building is in the range of 0.

TIME HISTORY ANALYSIS IN ETABS PDF

The mode of oscillation with smallest natural frequency is called as fundamental natural frequency. This is associated with release of stored strain energy that spreads out in all directions from the fault region in the form of seismic waves that travel through the body and along the surface of the Earth.

These seismic waves, primarily of two types called the body waves and surface waves, together cause shaking of the ground surface of the Earth on which the buildings are founded. This can be done by creating another nonlinear modal history case.

How to Create time history analysis function in ETABS 2015?

There is not much differences in results was observed in above two procedures. If the initial load vector is considered as unstressed condition no time history analysis in etabs case needs to be defined. If the time history lateral case is suppose to start from some defined gravity case a gravity nonlinear time history case must be defined with dead load and scale factor as 1.

The number of time steps may be less than lateral time history case for eg it may be steps of 0. The starting vector is recommended as dead load since this load will initially be there on structure before earthquake event occur and hence assigning the starting load time history analysis in etabs will give more realistic results.

Define mass source Define mass source to calculate seismic weight of building. The code says that we can take the average of the 7 TH's to get a design force. To do this, we've taken the average of the maximum absolute values of the results.