Earthquake Resistant Concrete Structures by Andreas Kappos, G.G. Penelis

By Andreas Kappos, G.G. Penelis

An English version of a profitable Greek textbook on earthquake resistant concrete buildings, this paintings offers an advent to the topic for pro engineers, researchers and complex students.

summary: An English version of a profitable Greek textbook on earthquake resistant concrete buildings, this paintings presents an creation to the topic for pro engineers, researchers and complicated scholars

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However, the designer should not overlook the high degree of uncertainty not only in the maximum acceleration but also in other earthquake characteristics, which are not included in the maps, such as the prevailing period of strong motions, the duration of strong motions and so on. 11 Maximum accelerations in gal (1000 gal=g) with 90% probability not to be exceeded in 25 years. 5 CONCLUDING REMARKS Summarizing the material presented above, we should focus on the following points: 1. An earthquake as an independent natural phenomenon in very few cases poses a threat to humans; it becomes a hazardous phenomenon primarily when it is considered in relation with structures.

The conclusion of the above discussion is that the number of normal modes of a structure equals the number of its degrees of freedom. Every normal mode is related to a natural frequency or a period of oscillation, known as the natural period. For plane systems the normal mode with the longest natural period is by definition the first or fundamental normal mode, while for pseudospatial ones the fundamental period is replaced by the set of three longest periods corresponding to two translational and one rotational mode of vibration.

17 An alternative quantitative relation between elastic and elastoplastic response of an SDOF system. 33), as well as the results of an inelastic analysis of several SDOF systems for the 1940 EI Centro earthquake, N–S component (Wiegel, 1970). At this point, it might be useful to explain in more detail what the term ‘ability to behave in an elastoplastic manner’ means for reinforced concrete. 19 which is loaded with a horizontal force V. By increasing V, the cantilever reaches the failure limit state.

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