Contents
What is response spectrum give its significance and construction?
The typical earthquake ground motion response spectrum represents an envelope of the peak responses of many single-degree-of-freedom (SDOF) systems with different periods. Hence, the construction of a response spectrum involves the analysis of many different sdof systems.
What is meant by response spectrum analysis?
Response spectrum analysis is a method to estimate the structural response to short, nondeterministic, transient dynamic events. Examples of such events are earthquakes and shocks. Generation of a response spectrum from a given time history. The use of a given response spectrum in a structural analysis.
How is pushover analysis done?
Pushover analysis is a static procedure that uses a simplified nonlinear technique to estimate seismic structural deformations. The structure is “pushed” again until the second weak link is discovered. This process continues until a yield pattern for the whole structure under seismic loading is identified.
Why is response spectrum used in earthquake engineering?
Response spectrum method is favoured by earthquake engineering community because of: It provides a technique for performing an equivalent static lateral load analysis. It allows a clear understanding of the contributions of different modes of vibration.
How are response spectrum curves used in structural engineering?
Structural engineers that use a response spectrum curve must understand the time the maximum peak value y(ω) MAXoccurs has been lost in the creation of the curve and can be significantly different for each value of ω. Therefore, combining responses from different modes will always be approximate.
Which is equivalent lateral force for an earthquake?
Equivalent lateral force for an earthquake is defined as a set of lateral force which will produce the same peak response as that obtained by dynamic analysis of structures . The equivalence is restricted to a single mode of vibration. The response spectrum method of analysis is developed using the following steps.
Which is the first step in response spectrum analysis?
The first step is the dynamic analysis while , the step is a static analysis. The first two steps do not have approximations, while the third step has some approximations. As a result, response spectrum analysis is called an approximate analysis; but applications show that it provides mostly a good estimate of peak responses.