Abstract
This paper investigates effects of the seismic load to a structure. The article describes main methods of the definition and practical application of the seismic load based on the Standard Eurocode 8. There was made a comparison of all methods using the same structure. A simple two-storeyed concrete 2D-frame with fixed joints was chosen. A one another model with rigid beams for some calculations was defined. The second model can be used for hand-calculations as a cantilever with two masses. The paper describes main dynamic properties of the chosen structure. Seismic load was defined by lateral force method, modal response spectrum, non-linear time-history analysis and pushover analysis. The time-history analysis is represented by accelerograms. There were made linear and non-linear calculations.
Highlights
For a calculation of the seismic response, the linear state of stress is commonly used
Pushover analysis is the last method of the Eurocode 8 (EC8) [1] for the calculation of the seismic response
Hand calculations of dynamical characteristics were made. These values were used for the hand calculation of the response from the spectrum
Summary
For a calculation of the seismic response, the linear state of stress is commonly used. A two-storeyed concrete frame with a uniformly distributed load was used This simple structure was chosen because of the possibility to applicate all methods. Lateral force method is a static and linear (linear behaviour of the material) calculation using horizontal forces as a seismic load. By this method a high frequency cannot have the decisive influence. Non-linear static (pushover) analysis is the last type of the seismic calculations from the EC8 [1]. In this standard, the most used version – N2 method – is used. For example [6,7,8,9] are dealing with this issue as well
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