Quick Answer: What Is Seismic Coefficient?

How do you calculate earthquake load?

An equation for the seismic load distribution, Ai =1/ αi , was obtained based on the assumption that the velocity spectrum of the ground motion is independent of the period.

Further, it is obtained from the maximum shear response using the elastic shear bar with both uniform stiffness and mass distributions..

Is code for seismic load?

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.

How do you calculate the load of a building?

Different Load Calculation on Column, Beam, Wall & Slab Column = Self Weight x Number of floors. Beams = Self Weight per running meter. Wall Load Per Running Meter. Total Load on Slab (Dead Load + Live Load +Wind Load + Self-Weight)

What does seismic mean?

1 : of, subject to, or caused by an earthquake also : of or relating to an earth vibration caused by something else (such as an explosion or the impact of a meteorite) 2 : of or relating to a vibration on a celestial body (such as the moon) comparable to a seismic event on earth.

What is seismic focus?

The hypocenter is the point within the earth where an earthquake rupture starts. Also commonly termed the focus. … See also epicenter.

What is seismic coefficient method?

The seismic coefficient method is one of the static procedures for earthquake resistant design of structures. Horizontal and/or vertical forces, which are calculated as products of the seismic coefficients H K , V K and the weight of the structures are applied to the structures as shown in Figure 1.

How are seismic coefficients calculated?

After earthquake zone has been identified, the following steps are followed:Calculate design horizontal seismic coefficient, Ah, which is given by (cl. … Calculate design seismic base shear for the structure (VB). … Now calculate the distribution of design forces on the structure.More items…

What is the other name of seismic coefficient method?

This approach is also known as “pushover” analysis. A pattern of forces is applied to a structural model that includes non-linear properties (such as steel yield), and the total force is plotted against a reference displacement to define a capacity curve.

How is accelerator coefficient calculated?

Accelerator Coefficient. This is the level of induced investment as a proportion of a rise in National income accelerator coefficient = Investment/change in income.

What is acceleration coefficient?

The principle of acceleration coefficient shows the relationship between the demand for consumer goods and the demand for capital goods i.e. capital investment. … According to Kurilara, “The accelerator coefficient is the ratio between induced investment and an initial change in consumption expenditure.”

What is Zone factor in earthquake?

Zone factors are given on the basis of expected intensity of the earthquake in different zones. In IS Code, it is given based on the Maximum Considered Earthquake (MCE) and service life of the structure in a zone.

What is base shear in earthquake?

Base shear is an estimate of the maximum expected lateral force on the base of the structure due to seismic activity. It is calculated using the seismic zone, soil material, and building code lateral force equations (Figure 10.3). … Proximity to potential sources of seismic activity (such as geological faults)

Why seismic analysis is required?

Seismic analysis is a tool for the estimation of structural response in the process of designing earthquake resistant structures and/or retrofitting vulnerable existing structures. In principle, the problem is difficult because the structural response to strong earthquakes is dynamic, nonlinear and random.

How do you find acceleration from coefficient of friction?

The friction force depends on the mass of an object plus the coefficient of sliding friction between the object and the surface on which it slides. Subtract this force from the applied force to find the acceleration of the object.

What is SA G in earthquake?

Spectral acceleration (SA) is a unit measured in g (the acceleration due to Earth’s gravity, equivalent to g-force) that describes the maximum acceleration in an earthquake on an object – specifically a damped, harmonic oscillator moving in one physical dimension.

What is horizontal seismic coefficient?

The Seismic Coefficients are dimensionless coefficients which represent the (maximum) earthquake acceleration as a fraction of the acceleration due to gravity. … The HORIZONTAL seismic coefficient is always POSITIVE, and represents a horizontal seismic force directed OUT OF the slope (i.e. in the direction of failure).

What is seismic load structure?

Seismic loading is one of the basic concepts of earthquake engineering which means application of an earthquake-generated agitation to a structure. It happens at contact surfaces of a structure either with the ground, or with adjacent structures, or with gravity waves from tsunami.