What is a pseudo static analysis?
In their most common form, pseudostatic analyses represent the effects of earthquake shaking by pseudostatic accelerations that produce inertial forces which act through the centroid of the failure mass. The results of pseudostatic analyses are critically dependent on the value of the seismic coefficient.
What is static seismic analysis?
Static Analysis The peak acceleration from the response spectrum is applied as a lateral force distributed along the pipe and bending stresses and support reactions are calculated. The seismic static coefficients are usually obtained from the seismic “zone”, which is corresponding to a level of seismic acceleration.
What is pseudo dynamic analysis?
Pseudo-dynamic method of analysis, considering the effect of earthquake loading, shear and primary waves, results in more realistic values of earth pressures than the commonly used pseudo-static method.
What is Pseudostatic?
1. In earthquake engineering to analyze the seismic response of soil embankments and slopes simply adding a permanent body force representing the earthquake shaking to a static limit-equilibrium analysis.
Is 1893 a zone factor?
For seismic zone V, the zone factor Z is 0.36 (Table 2 of IS: 1893). Being an office building, the importance factor, I, is 1.0 (Table 6 of IS: 1893). Building is required to be provided with moment resisting frames detailed as per IS: 13920-1993. Hence, the response reduction factor, R, is 5.
What is pseudo-static loading?
In the pseudo-static analysis, the peak ground acceleration is converted into a pseudo-static inertia force and applied as a horizontal incremental gravity load. Good agreement is obtained between the pseudo-static analysis and analytical methods for the calculation of the active coefficient of earth pressure.
Is 875 a standard?
This Standard gives wind forces and their effects (static and dynamic) that should be taken into account while designing buildings, structures and components thereof. This Code provides information on wind effects for buildings and structures, and their components.
Is 1893 an RSM?
It is to serve this purpose that IS 1893 : 1962 ‘Recommendations for earthquake resistant design of structures’ was published and revised first time in 1966. In the clauses for design of multi-storeyed buildings, the coefficient of flexibility was given in the form of a curve with respect to period of buildings.
Is earthquake a code?
Seismic requirements for Design, Detailing and Construction are covered in other codes, e.g., IS:4326, IS:13920, 3. For an Earthquake Resistant Structure, one has to follow IS:1893 (Part-1) together with Seismic Design and Detailing Codes. What does IS:1893 Cover?
What is the formula for seismic coefficient?
Generally, the horizontal seismic coefficient H K is 0.2 – 0.3 for road and railway bridges, around 0.15 for dams, 0.15 – 0.25 for port and harbor facilities and 0.6 for nuclear power plant buildings. following formula as a product of the total mass of the structure M and the acceleration α .
How is pseudostatic analysis used in earthquake engineering?
Pseudostatic analysis is one of the simplest approaches used in earthquake engineering to analyze the seismic response of soil embankments and slopes. However, the choice of seismic coefficients used in the analysis
Why is finite element pseudo static analysis important?
Due to its simplicity and relative inexpensiveness, finite element pseudo-static analysis may provide a reliable tool, at least for the preliminary assessment of the stability of geotechnical structures (such as embankments, retaining walls and tunnels) against earthquake-induced failure.
When to consider undrained response in pseudo static analysis?
SLOPE/W has the option to consider an undrained response when doing a pseudo-static analysis. Two methods are available for computing the undrained strengths at the base of each slice. The strengths are calculated in the first stage of the analysis when the seismic forces are excluded.
Which is better pseudo static Fe or time domain Fe?
The pseudo-static FE approach can accurately model the in-situ stresses prior to seismic loading (when it follows a static analysis simulating the construction sequence) is relatively simple and not as computationally expensive as the time domain approach.
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